Keyboard ribbon connector on main board - MDA III, XDA III, PDA2k, 9090 General

I recently dismantled my BA to work on the LCD. I originally thought it would be necessary to disconnect the keyboard ribbon from the main board, so I removed the tape and black clip from the surface mount connector. However, it turned out I could leave the ribbon in place, so I didn't remove it.
After reassembly, only a few of the keyboard keys now work, and the blue LEDs no longer work at all.
I was careful not to force or twist the ribbon at all as I worked, so I don't think it's damaged, but I haven't been able to make the black clip go back on properly. I suspect this is the problem. I have tried to reseat the clip but without success and the keyboard is still the same.
Can someone please explain the role of this black clip and tape, and their relevance to the electrical connection. And can anyone direct me to a 1000x magnified picture of how the clip is supposed to fit!
Thanks in advance...

Hi there,
I had a similar problem when dissasembling one of my PPC6600 phones. The ribbon is quite dellicate, and I wound up ripping the outer conductor (it is the thicker one, and it happens to power the backlight LED's). Needless to say, I had to use a very fine tip soldering iron and some hair-fine wire to fix the mess. When I got my hands on a scrap one from EBAY (for like, 75 bucks because the ESN was locked out), I pulled the keyboard from it and replaced my hack.
Also, I have added to the WIKI a procedure to take apart the BA. I think you can find that HERE -> http://wiki.xda-developers.com/index.php?pagename=DIS_BA_PICS
Check out the one pic that is big that shows you how to flip up the clip.
The connector you are talking about has a little black (brown?) clip that flips up 90 degrees to allow the ribbon to come out. If you didn't flip it up, you might have been able to remove the ribbon, but tough luck getting it back in. You can stick your fingernail in there where the ribbon goes, and lift up on the clip. It should pop up ad remain connected quite easily. Also, when you re-insert the ribbon, you want to make sure that the two protruding tabs on the ribbon 'seat' fully against the connector before you push the clip back down onto the ribbon.
Have fun!

When I did the work I had already seen your exellent pics (thanks ) and my black clip came right off when I lifted it. So my problem is getting the black clip back on, so that it can be flipped up and down normally again. At no time did I try to remove the ribbon so I don't think it's damaged - but I'm wondering if the black clip needs to go back properly before the electrical connection is good again.
PS to anyone dismantling BA - remember to remove both the SIM and the SD card/blank, as these both jam the cover and prevent removal - shame if someone missed this and snapped something . (I tried to add this info to the page with pics but the Edit button wouldn't let me do it - gives a "page not found" error.)

Hi again,
My phone doesn't have a SIM card (is this a European thing or are there some carriers in USA that use SIM cards?)
Anyhow, I think I remember dealing with connectors like these before and having that clip pop off. There are two little tabs on the clip that have little round buttons on each side of the clip tabs, and these buttons prodtrude off the sides of the clip. They match a slot on the connector part that is surface mounted to your mainboard. So, you have to align the clip properly so that these protruding bumps 'pop' back into the white housing on both sides. Now, if these tabs broke off.... then I guess you're outa luck, unless I guess you find some very thin plastic that you can shove in on-top of the ribbon (underneath the part of the housing where the clip SHOULD have gone), so that it pushes the exposed conductors of the ribbon down onto the connector.
Hope this helps!

Many thanks, this helps a lot by confirming (a) how the clip fits and (b) its role in the electrical connection. This information is much appreciated as it gives me a fighting chance when I next have a go at fixing the thing!
How do you get by without SIMs? Does that mean a phone is forever tied to the one provider and phone number?

yodafreak said:
My phone doesn't have a SIM card (is this a European thing or are there some carriers in USA that use SIM cards?)
Click to expand...
Click to collapse
It's a GSM thing. GSM phones (like the PDA2K or SX66) use SIM cards, CDMA phones (like the PPC6600) don't.

Related

M2000 Dismantling/Housing Replacement

I dropped my SPV M2000 a few weeks ago and it has sustained a few battle scars.
I bought a dummy model on eBay which is identical to the original and am planning to use it to give my phone a new housing. Problem is I have got half way through but am a bit nervous about the keyboard/screen as these have ribbon type connectors that need to be disconnected from the main board and then reconnected.
Has anybody attempted this? I've managed to replace the back part of the case successfully as it doesn't involve interferring with any connectors...
its pretty straight forward.
when you get the back cover off (six screws, 3 short and 3 long - two on the outside top and 4 under the battery) you'll see the rest button and the vibrate motor, just gently lever them out of theire respective recesses and leave them attaced to the system board.
Then with the phone held right way up, back facing you you'll see a ribbon cable just above where the vibrator motor was. Its taped down with yellow tape.
Gently peel the tape off (keep it safe to put back later)
then the black part of the connector that the ribbon slides into lifts up be very gentle and it will pop up. Once you've popped it up, the cable will come out easily.
Once you have that cable out, slide the keyboard down without turning the phone over, then put the phone on its side and separate the system board from the keyboard/screen by a couple of inches look at the back (as you see it it actually the front of course) of the sys board, you'll see two more ribbon cables that plug on to the sys board. Gently lift the edge of each connector and they'll pop off the board easliy.
take the sys board right out of the screen/keyboard, then undo the 4 remaining torx screws (you haveto have the keyboard fully extended to see the bottom screws) and the screen/keyboard can then be gently parted from the front screen surround.
assembly is the reverse of removal. The key is to extend the keyboard when you reassemble/reinstall the system board initially.
hope that helps!
cheers
-Griz
Griz,
Thanks - I will give it a try
Cian
Please include pictures maybe you can give a tutorial.
I've followed this and changed the screen surround on my M2000 without any problems.
The only thing not mentioned in the instructions is that there are 3 small screws that secure the system board to the housing that have to be removed before the system board can be separated away.
I bought a "dummy" M2000 from eBay and most of the casing from one of these can be swapped over. The only thing that can't is the centre section that contains the keyboard as the keyboard is embedded in this and can't be removed (the keyboard on the dummy ones isn't a working one).

Just replaced the touchscreen... but...

Hi all.
I've just replaced the touchscreen on my IIs with a new one.
http://cgi.ebay.co.uk/ws/eBayISAPI....MEWN:IT&viewitem=&item=300104652377&rd=1&rd=1
Now, it 'kind' of works, but doesn't... but I think I know why.
I was unsure how to connect it to the LCD on the back, so just taped it in place as good as I can. The old copper tape which was there has long gone now, and I know it was a better thing to use, but I just ran out.
Now, do I need to solder it ideally? Warm up/connect? or is it just taped into place and thats it?
It does work, kind of, it registers the contact, but not precisely, and I cant get past the 'Alignment' process. Also it only seems to work if the slider is open, and sometimes registers a click all by itself, so I would imagine it is related to the connection.
Any tips/methods on how I should go about properly attaching it?
Also, would it make any difference the touch screen being about 1mm more to the left on the lcd itself? Just if I put it on smack-bang in the middle, the connector is out by 1mm, and not true.
Cheers
me
It needs to be soldered. My method was to use some 30 AWG magnet wire to extend the solder pads on the new touchscreen to meet the contacts on the back of the LCD. This makes it easy to solder them into place with only a dab of solder on the end of each piece of wire. This has held steady for nearly a year now. I reused the copper tape but put some electrical tape over it for good measure.

[Q] loose spring

The spring has come loose from one of the portions of the slider mechanism. I can't really tell but it looks like it's still attached to the screen. It doesn't look broken, at the loose end it looks like a screw should go there. How hard would it be to put back into place? I've been looking for a good teardown video of this model but I can't find it. Samsung wants to charge me $70 for what seems like a fairly simple repair since the pieces aren't even broken. Any help?
the good news is I was right, the unit is easy to disassemble, and the spring is easy to put back on the slide plate. Unfortunately I managed to rip out the video cable in the process ;p I'm hoping it's easy to replace and I won't need a whole new screen
$36.95 for a new cable http://cellphone-repair-shop.com/att-captivate-glide-main-flex-cable/
Well this could be helpful, for my slide up has some problems and this is probably what's about to come out on mine.
sent from my captivate glide
I didn't take any pictures but it's pretty easy to put the spring back on the slide mechanism. There are two little silver posts and all you have to do is compress the spring and pop it back into place. However, you can't get to the slider mechanism that easily. Once you get the phone apart, the screen will be tied to the back by a video cable. To avoid ripping it out like I did, I recommend taking the screen apart and unplugging it, since you need to take the slider off the screen anyway to fix it.
You can also try feeding the cable back from the motherboard. If you look at the picture I linked to you can see at the very top a gold square and a little cable off to the side of that. The little flex cable attaches to the motherboard, and the gold square is glued to a plastic spacer in the housing. You can peel it off the spacer. When you replace it there's no need to glue it back on. It's held on by tiny notches and pressure from the assembled phone keeps it on.

My experience fixing Xperia PLAY phones.

In addition to the constant influx of iPods and iPhones friends, family, and coworkers bring me to fix, I've taken apart a few different Xperia PLAY phones more times than I can count, so I thought I'd give a few "pro tips" to people who need to know the ins and outs of it. This isn't a disassembly, assembly, or even a repair guide, it's just the stuff I think those guys missed.
First, don't use a heat gun to loosen the adhesive on the front glass + digitizer. The plastic frame wrinkles and melts readily, particularly right under the face buttons.
Second, make sure you transfer as much as possible when you replace the frame. Replacement frames usually do not include the rubber shroud for the proximity sensor and it will not work right without it. I had one phone that seemingly worked fine until the screen protector peeled off while inserting in a pocket and then no amount of clear tape, screen protectors, or Sharpie-marking would fix it. A salvaged rubber shroud fixed it right up. Some replacement frames have a film-backed adhesive for holding it there and some don't. It probably depends on when they were yanked from the manufacturing line, assuming that they are original parts and not replica parts. You also want to make sure you transfer are the inner dust gasket that goes underneath the frame/glass or else things will be filling up with dust quickly. There is no speaker grill and the foam around it does not stop intrusion. A salvaged frame/glass adhesive is likely to allow dust in unless you didn't have to pick much out of it when swapping (usually glass shards). There are also little metallic grounding foam rectangles crammed in the corners that only one replacement frame I've seen has ever included (was probably salvage though listed as "new"). They probably aren't necessary and I've gone long periods without them, but why wonder if a static charge build up is responsible for your erratic touch screen?
Next, be extremely careful separating the glass from the frame. I've managed to crack good ones even going slowly and leaving gaps filled with picks and pry tools. Heat didn't seem to help much and, as mentioned earlier, is discouraged. Cleaning the screen after man-handling it isn't always easy, but don't avoid touching the back side because you will probably need the area to spread the pressure and avoid a crack. I use a levered "mini suction cup" from Harbor Freight on the top side and as many fingers as spread out as I can on the bottom, but the suction cup is near useless on a cracked screen (even tape-coated). I do suggest covering a shattered screen with tape to hold all the bits together but you are still going to have a hard time cleaning the adhesive up. You can always buy a frame with digitizer pre-installed but I know a lot of you want to buy complete replacement housings instead and it's kind of a waste, but at least you don't need to worry about that adhesive (still: don't forget to transfer the other bits!).
The digitizer parts I've salvaged from phones had higher version numbers than the ones I've seen sold as replacement parts and seemed to be more erratic so I prefer salvaged ones. There can be other problems as well. The flat flex cable from the digitizer is supposed to have an adhesive backing that holds it still where it connects to the tiny cable from the earpiece. Replacements often do not have it, which is yet ANOTHER reason to prefer salvage parts. It may not seem like such a big deal considering that there is a black plastic piece screwed down over it to protect it from getting caught in the mechanism, but the connector does not hold on very well and the phone will not boot if it is slightly out of alignment. If you reassemble it and just get a buzz from the vibration motor with no display and no other sign of booting, check this connection (same thing if the digitizer suddenly stops registering touch). Even a small drop/impact will cause it to happen again, so I recommend securing it with precisely cut tape or hot glue (stay clear of the sliding rails).
Now, keep it clean while you work or you will be staring at that contaminate or thumbprint for a long time. I usually wear fresh latex gloves when working on the glass but it doesn't do much good if you keep transferring oils from the rest of the phone. Wash your hands right before you start and clean the outside of the phone. Before you begin, try just touch a used dish soap dispenser with a damp thumb and run all along to screen except the buttons and earpiece. Do it again with just the damp thumb (dilutes the soap that remained from the first pass) and wipe it with a clean lint-free cloth. Your own clean and dry fingertips/palm should readily absorb any remaining streaks/oils. Be sure to wipe down the rest of the phone too and don't transfer it back to the glass. Once inside I use layer after layer of clear tape to lift gunk from the earpiece (no mesh, remember?). Put on new gloves before you start handling the glass after disassembly, even if you were wearing some for disassembly. To clean the back of the glass I put the adhesive between wax paper while I clean using lint-free cloths, 90+% alcohol, and acetone. For the LCD, use tape to lift most contaminates and resort to alcohol + lint-free cloth if that doesn't work. It doesn't need to be too perfect, especially if scratched from cracked glass. Most imperfections only show when it's off.
Hot glue is great for removing adhesive screw covers without showing pick marks or other signs of tampering but you have to make sure to leave an edge exposed so that you aren't just picking it out of the glue instead. I've been getting mine off cleanly without any tricks like this but it came in handy when I was first disassembling one and there weren't any guides to tell me that there weren't screws under the large silver strip (just covers rivets or injections mold points, IIRC). It's also good for sealing off water sensors, like the one you see through a hole under the battery door. There's another one by the contacts on the battery itself, one by the microphone under the gamepad, and one in the opposite corner under the PS Certified logo. I had an AT&T rep tell me that a brand new phone had a tripped water sensor (LIES!) so I would look for ways to do this with most any new phone.
I can't count how many times I've left the power button out while reassembling. It's not usually that I forgot: It's that it falls out while snapping the back on. I've left the face buttons out a few times too.
My first one had the cable folded wrong after reassembly. It still worked fine for a couple years but did eventually require replacement. Once it folds wrong it'll probably stay that way even after correct reassembly (like mine did). Do not try to attach it to the main PCB using a spudger, butterknife, or whatever to awkwardly push the connector down with everything pulled apart. The only thing you need to do is to slide the cable into the phone's closed position, align the plastic posts on the connector with the corresponding holes on the PCB, and then push down on the PCB until it snaps. I'm sure I tried this first back then but chickened out because the connector didn't snap very easily but that is how you are supposed to do it.
Before I talk about the replacing the slide cable, I want to express my annoyance at all the eBay/YouTube/iFixIt.com people who call it a "flex cable." I don't like the term flex cable because generally ALL cables should be flexible and that doesn't distinguish what it is well enough for people looking for the part. Technically, it's a flat cable or a slide cable, though I wouldn't object to it being called a flex PCB (flex PCBs usually have components other than just connectors like a rigid printed circuit board would). "Flex cable" is silly, redundant, and does not describe anything more specific than just "cable." To complicate matters, there are several actual flex PCBs in this phone to distinguish from when ordering the part. Why did so many people start calling flex PCBs "flex cables" in the first place?! In our case the sliding portion is a *flat* cable, so I can see where "cable" was introduced from, but people say "flex cable" for any flat cable made like a flex PCB these days whether fixed or sliding. At least you know now that you are probably going to have to use the incorrect terminology to find what you want online and sift through many useless results.
*whew*
Now, slide cable replacement is easier than it would seem but intact removal isn't and brand new replacements can be defective. It was a troubleshooting nightmare when I encountered a defective one because I replaced the LCD and glass + digitizer at the same time and suspected/checked everything else first, even taking apart my personal phone multiple times to test parts. The plastic part of the connector on the PCB end must be transferred to the new cable and the old one will not reliably stick back down to it even if you did not contaminate the adhesive. I successfully transferred a cable from a water-damaged phone to my personal phone before fixing up the water-damaged donor phone with a new one, so the adhesive on the salvaged part was weak and I didn't realize how hard it was to remove intact until later. When separating the defective new one there was seemingly no place to pry on one end other than underneath the part where the earpiece/camera connector was located. This broke the side of the connector that holds the locking flap though I was still able to use/lock it. I claimed warranty on the defective part anyway because the connector was not needed for proving the cable was defective (a functional cable works with that connector populated or not). This new part was slightly different from those found originally installed in the phone (different colored plastic connectors and such). The second new one I ordered from elsewhere had double-sided adhesive down the middle, a foil quality control sticker, and the same odd connector colors. I didn't think there was a market for replica parts on this phone but it does seem like more than simple factory revisions. Anyway, removing it involves removing metallic tape then lifting a plate that is still adhered underneath with amber-colored Kapton tape. You can see it from the slide mechanism below. I pinch the plate from above and below with two fingers and lift, gradually peeling the tape which I then fold inside and secure to avoid contaminating the adhesive. The cable has a plastic band across it that fits between fingers on this plate. When secured, this isolates the end with multiple connectors from the movement of the sliding portion, so make sure this is in place when reinstalling. It may be best to avoid removing the adhesive backing paper until after the plate and cable are securely taped back down with both the Kapton and metallic tape while the fingers are holding it in position. If you stick it down first and then secure the plate you may find it slightly too long or short to position inside the plate when securing it all back down. To thread the main connector through the slide board opening it may seem that it will only fit by folding the cable but DON'T! Coil it. Without flattening it, bend the connector 90-degrees over from the cable path and then adjust the angle until you have a coil-shape that you can work through with the connector sideways.
I ordered a "no useable parts" dummy phone just for the heck of it and, other than the Sony Ericsson logo on the fake battery door and maybe the stickers that cover the screws, they really don't have any salvageable parts. You can't swap any buttons, keys, springs, covers, etc into a real phone. The closest would be the face buttons. They will fit in a real phone, but they are too tall and put constant pressure on the PCB switches causing unintended key-presses (especially back and search buttons). The extra height easily protrudes out the top and is not the issue so filing them down vertically won't fix anything. I snipped some excess rubber to more closely match the design of the original buttons but it didn't help. I unscrewed the screw in the corner under the search key and unsnapped the bottom edge of the frame from the back/slide board and they work great until the phone inevitably snaps back together. I'd say they felt better then the original with the extra height (I can't stand how close they are to the screen). It's tolerable with ICS/JB's Navigation Bar (on-screen key functions), but I would rather salvage real buttons or pay too much for the eBay ones ($10-$20; very uncommon part; always sold with crap you probably don't need).
I have yet to find a replacement battery door that includes the rubber trim around the speakers and the foam piece surrounding the rear/noise-canceling microphone. I've ordered a few auctions that show them in the pictures but they always arrive bare. You can transfer them with a razor but it likely won't be perfect. Without them the speaker audio will probably echo around inside the battery compartment and make its way into the mic, though people usually don't notice it. Painting on some Plasti-Dip might do the trick, so try that if it bothers you.
Unlike an iPhone with a million different screws, you don't have to keep track of what goes where and everything is easily accessible. Bare minimum to take it all apart: Some fingernails, a T5 or T6 (pick one) and a PH0, 00, or 000 Phillips (pick one). There don't seem to be any tamper/warranty seals and the only concealed screws are the two obvious ones underneath metallic cover stickers on the display/slide board. There are no screws under tape or labels and no water sensors covering them either. All 6 Phillips screws are the same size but you'll likely want to keep the two with adhesive in their original holes to re-use the covers (adhesive usually remains on the screw instead of the cover). There are only two different Torx screw types but it's obvious what goes where (6 stubby flat ones on the top and bottom, 7 long thin ones around the battery area).
There are bits and bobs taped to and embedded in the rear housing including antenna/RF stuff, some more obvious that others. I've compared and the R800x is very different from the R800at even though the plastic frame looks really similar (R800x has a blocked SIM slot, of course). IMO, any housing swap should be limited to the front frame, the gamepad, and the battery door (only colored parts anyway). If you nicked your chrome, hopefully it was on a button or something that can be swapped (springs are a pain). It may be possible to transfer everything but I wouldn't trust it after all the peeling and picking. The one report I've seen of someone transferring between a GSM/CDMA models seems blissfully unaware of the metal wire behind the volume keys on the CDMA model that isn't there on GSM (at least it's not there on my R800at GSM).
That's all my advice for now. If you are having any trouble, let me know.
Excellent guide, thank you for taking the time to type this up. I think a mod should sticky this.....
Awesome guide! Thanks much for it!
@ozzmanj1 Agree, so more people will notice it.
Thanks for help buddy!!!
As for the case of the digitizer, mine has some parts (lower left) that are not recognizing touch inputs. Will realigning the digitizer cable help? I' d really not want to buy a new one right now as I am quite on a tight budget. Please help. Totally in distress here with my very sickly Play.
So, first I want to say thanks for this post as it's been invaluable in my working on my own XP.
I'm in the process of changing out the LCD and slide cable and am wondering about versions of the phone and compatibility. On Ebay I'm finding lots of parts listed as being for R800i\R800x\R800a. Very few parts are listed for R800at (which is what I have)
In changing out parts (anything hardware related) what parts are interchangeable and what parts are not? Anyone able to help?
Right now I'm looking at LCD screen and slide cable, but in the future I would like to change out the digitizer (I read the other page about having to possibly roll back to a different kernel) and perhaps other inner workings of the phone as well. I would just like to know what I can use from other models of the XP and what are model specific.
Thanks!
Arevyn said:
So, first I want to say thanks for this post as it's been invaluable in my working on my own XP.
I'm in the process of changing out the LCD and slide cable and am wondering about versions of the phone and compatibility. On Ebay I'm finding lots of parts listed as being for R800i\R800x\R800a. Very few parts are listed for R800at (which is what I have)
In changing out parts (anything hardware related) what parts are interchangeable and what parts are not? Anyone able to help?
Right now I'm looking at LCD screen and slide cable, but in the future I would like to change out the digitizer (I read the other page about having to possibly roll back to a different kernel) and perhaps other inner workings of the phone as well. I would just like to know what I can use from other models of the XP and what are model specific.
Thanks!
Click to expand...
Click to collapse
Just about everything but the chrome back housing is a simple swap. LCD, slide cable, digitizer, camera/earpiece, face buttons, game pad, slide board, front frame, camera, headphone jack, etc. The only parts tied together for compatability are the motherboard and the chrome back housing and that is because it has all the antennas installed in it. It's probably possible to move all the components but I've never even had to take the speakers out and can't speak to the difficulty or possibility for certain. I'm worried that lifting the adhesive films would damiage the antennas inside. As I mentioned in the OP, there are other little parts to move when you compare the two and note the differences. Good luck!
Sent from my SM-N900T using Tapatalk
CZroe said:
Just about everything but the chrome back housing is a simple swap. LCD, slide cable, digitizer, camera/earpiece, face buttons, game pad, slide board, front frame, camera, headphone jack, etc. The only parts tied together for compatability are the motherboard and the chrome back housing and that is because it has all the antennas installed in it. It's probably possible to move all the components but I've never even had to take the speakers out and can't speak to the difficulty or possibility for certain. I'm worried that lifting the adhesive films would damiage the antennas inside. As I mentioned in the OP, there are other little parts to move when you compare the two and note the differences. Good luck!
Sent from my SM-N900T using Tapatalk
Click to expand...
Click to collapse
Awesome! Thanks so much.
---------- Post added at 06:55 PM ---------- Previous post was at 06:11 PM ----------
CZroe said:
Just about everything but the chrome back housing is a simple swap. LCD, slide cable, digitizer, camera/earpiece, face buttons, game pad, slide board, front frame, camera, headphone jack, etc. The only parts tied together for compatability are the motherboard and the chrome back housing and that is because it has all the antennas installed in it. It's probably possible to move all the components but I've never even had to take the speakers out and can't speak to the difficulty or possibility for certain. I'm worried that lifting the adhesive films would damiage the antennas inside. As I mentioned in the OP, there are other little parts to move when you compare the two and note the differences. Good luck!
Sent from my SM-N900T using Tapatalk
Click to expand...
Click to collapse
Have you noticed a difference in an LCD screen with a green cable vs one with an orange cable? I have an orange one in mine, and wasnt sure if its a different part, or just a different batch of screens
Arevyn said:
Awesome! Thanks so much.
---------- Post added at 06:55 PM ---------- Previous post was at 06:11 PM ----------
Have you noticed a difference in an LCD screen with a green cable vs one with an orange cable? I have an orange one in mine, and wasnt sure if its a different part, or just a different batch of screens
Click to expand...
Click to collapse
I am color blind and never took notice but I switched LCD between R800i, R800x, and R800at and they were all compatible. They have no reason to make anything in that half of the phone different, so they don't.
Sent from my SM-N900T using Tapatalk
narflynn619 said:
As for the case of the digitizer, mine has some parts (lower left) that are not recognizing touch inputs. Will realigning the digitizer cable help? I' d really not want to buy a new one right now as I am quite on a tight budget. Please help. Totally in distress here with my very sickly Play.
Click to expand...
Click to collapse
Hey, I've also experience same problems as yours... I just wonder is it the flex cable or digitizer....
matfai said:
Hey, I've also experience same problems as yours... I just wonder is it the flex cable or digitizer....
Click to expand...
Click to collapse
If only some areas are responsive then I'm pretty sure it's the digitizer. The IC likely encodes the output so that all the raw connections don't need to be extended over the slide cable. IOW, the pins that carry digitizer data probably carry encoded data so that it's fewer pins. This means it would work either all or not at all if the slide cable had anything to do with it.
Sent from my SM-N900T using Tapatalk
CZroe said:
If only some areas are responsive then I'm pretty sure it's the digitizer. The IC likely encodes the output so that all the raw connections don't need to be extended over the slide cable. IOW, the pins that carry digitizer data probably carry encoded data so that it's fewer pins. This means it would work either all or not at all if the slide cable had anything to do with it.
Sent from my SM-N900T using Tapatalk
Click to expand...
Click to collapse
Thanks for reply... So, do I have to replace the digitizer or just realigning the cable will help?
matfai said:
Thanks for reply... So, do I have to replace the digitizer or just realigning the cable will help?
Click to expand...
Click to collapse
In my experience, cable alignment has also been an all or nothing issue so you probably need to replace the digitizer. It couldn't hurt to realign the digitizer cable first just in case it can avoid an unnecessary expense. That fixed a Cubot C9+ I worked on Saturday (digitizer not working at all) but not the iPhone 4S I worked on yesterday (bottom row of digitizer not responding).
Sent from my SM-N900T using Tapatalk
stuck in safe mode after replace slider cable(flex)
Hi i'm writing here in hopes you can help me, i bought and replaced the "flex cable" and it kinda worked, somehow it can only boot in safe mode and back, home and menu buttons on the front is unresponsive (i can use joypad though) i've tried opening it up again to check for loose connectors and i even tried disconnect the cable to the front buttons but safe mode persists, i tried to flash several official ftf images and a custom rom to see if it helped, but also without any luck.
I hope that you can help me.
Thx for a nice indepth post
docsmiley said:
Hi i'm writing here in hopes you can help me, i bought and replaced the "flex cable" and it kinda worked, somehow it can only boot in safe mode and back, home and menu buttons on the front is unresponsive (i can use joypad though) i've tried opening it up again to check for loose connectors and i even tried disconnect the cable to the front buttons but safe mode persists, i tried to flash several official ftf images and a custom rom to see if it helped, but also without any luck.
I hope that you can help me.
Thx for a nice indepth post
Click to expand...
Click to collapse
If you are booting in safe mode, that "menu" button is always pressed. My guess is faulty/damaged flex cable. You can try your old flex cable and see can you enter flash/fastboot mode (test to see is back and search button is working)
Bakisha said:
If you are booting in safe mode, that "menu" button is always pressed. My guess is faulty/damaged flex cable. You can try your old flex cable and see can you enter flash/fastboot mode (test to see is back and search button is working)
Click to expand...
Click to collapse
Search button is working as intended (also when booted into safe mode) and i can enter flash mode with back button and flash ftf files, back button is just not functional when booted (only on joypad).
I also figured it had to be the flex cable but i thought i was so carefull when mounting it so i didn't thought i damaged it.
The old flex cable didn't give any picture at all, so can't see if it boots into safe mode with that.
docsmiley said:
Search button is working as intended (also when booted into safe mode) and i can enter flash mode with back button and flash ftf files, back button is just not functional when booted (only on joypad).
I also figured it had to be the flex cable but i thought i was so carefull when mounting it so i didn't thought i damaged it.
The old flex cable didn't give any picture at all, so can't see if it boots into safe mode with that.
Click to expand...
Click to collapse
I have received a defective flex cable before so it's possible you have also. In my case it didn't work at all (no picture).
Sent from my SM-N900T using Tapatalk
Thanks for your replies I'll see if I can get it replaced
Sendt fra min Galaxy S4 med Tapatalk
slide flex replacement
hi, its my second time replacing the slide flex cable of my r800i, however this time, my digitizer is unresponsive to the flex i bought, i bought it in the same store where i bought the first one which was perfectly fine before,
my question is does the slide flex cable of xperia play 4G differs to the slide flex cable of the old one xperia play r800i,
dashu31 said:
hi, its my second time replacing the slide flex cable of my r800i, however this time, my digitizer is unresponsive to the flex i bought, i bought it in the same store where i bought the first one which was perfectly fine before,
my question is does the slide flex cable of xperia play 4G differs to the slide flex cable of the old one xperia play r800i,
Click to expand...
Click to collapse
They are the same. I have also switched then between a "4G" R800at and a R800x. I have also received bad digitizer flex cables that were new. It really is luck of the draw. A lot of replacement parts on eBay are factory seconds, which may have been removed from the production line for good reason. That's why I always order parts in sets of two for anything I know I will need in the future and I always test both. For example, recently I got two iPhone 4S screens and one had the frame installed upside down. Before that I ordered two replacement iPhone 4 30-pin dock replacements and one had a defective microphone. Before that I ordered two iPod touch 2G digitizer/frame assemblies and one didn't work along the left side.
Here I am identifying a couple bad iPhone displays from a lot:
http://youtu.be/TbxzCiGhwPM
I didn't own an iPhone so I had to test them all with the phone the first customer provided.
Edit: Oh! And make sure the problem is not with the digitizer connection under the black plastic cover. Mine works it's way loose all the time and needs to be secured with tape. Even when inserted fully straight and locked, I put it together and find it not working or the display black until I take it back apart and reseat it. It will twist slightly and even the slightest angle affects the connection.

[Q] Help

I was trying to fix one problem and ended up making another.. Anyone know if the plastic piece that has the latch on the mother board (zif connector maybe?) that holds the ribbon for the charger can be replaced? The tablet still works but I can now no longer charge it or plug it into the computer. If its not possible to fix that then is wireless charging possible? I know I still wouldn't be able to sync with the computer but I would be good with that as long as I can charge it.
Below is a pic of what im talking about
Erm ouch, im no electrician but i think you may have ****ed it...
Right well best thing i can suggest is that a Samsung repair agent might have to look at it.
(Or you could find the pieces on the Interwebs for it)
I've done this a few times to laptop motherboards years ago. Just use some high quality tape to make sure the connection is complete. If it comes undone you'll just have to redo it, but if you use good tape you shouldn't have to. Definitely not the end of the world, they're just cheap plastic clips.
wbaner said:
I was trying to fix one problem and ended up making another.. Anyone know if the plastic piece that has the latch on the mother board (zif connector maybe?) that holds the ribbon for the charger can be replaced? The tablet still works but I can now no longer charge it or plug it into the computer. If its not possible to fix that then is wireless charging possible? I know I still wouldn't be able to sync with the computer but I would be good with that as long as I can charge it.
Below is a pic of what im talking about
Click to expand...
Click to collapse
Even u manage to wireless charge it and how is tablet suppose to get power from the battery?
The zif connector is cheap, but alot hasssle to remove the board and dont know if the EMI shield is soldered into the board or with screw like Note 10.1 had.
Hard to see from this disassemble video. (scroll to end)
If u got good soldering skills and can find the zif connector part. Then its worth a try.
https://www.youtube.com/watch?v=zOzrRu8PB2Y&list=WL&index=3
Backyard repairs
All you need to do is achieve 2 things.
1. Locate it so that the cable contacts line up with the pins in the connector.
2. Apply pressure on the cable so it has good contact.
Using your fingers put pressur on it and check that its charging when plugged into the usb.
Then tape it in position.
To get the pressure on it, cut a piece of plastic and tape it on the area where it contacts the pins.
Then cut some rubber so that its thick enough such that it puts pressure on that plastic bit when its put back together.
Tape that rubber in position and put cover back on.
Should last, but if not just redo it again and get the rubber thickness right.
warboat said:
All you need to do is achieve 2 things.
1. Locate it so that the cable contacts line up with the pins in the connector.
2. Apply pressure on the cable so it has good contact.
Using your fingers put pressur on it and check that its charging when plugged into the usb.
Then tape it in position.
To get the pressure on it, cut a piece of plastic and tape it on the area where it contacts the pins.
Then cut some rubber so that its thick enough such that it puts pressure on that plastic bit when its put back together.
Tape that rubber in position and put cover back on.
Should last, but if not just redo it again and get the rubber thickness right.
Click to expand...
Click to collapse
haha.. I was messing around and figured this out.. only I put a piece of cardboard box on it and taped it.. put the cover back on it and its charging again.
wbaner said:
haha.. I was messing around and figured this out.. only I put a piece of cardboard box on it and taped it.. put the cover back on it and its charging again.
Click to expand...
Click to collapse
Well it says charging but the percent is still going down?
Going to power off the tablet and see what happens.. ugh
Also watched the video that was posted and I cant really tell much from the video.. if you can just buy one of those sockets and have it put on the motherboard then I will go that route.

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