Develop Bugs

[Q] Replaced LCD twice, only backlight comes on... What to do, now!?

Hey Boys n Girls!
I made a mistake and bought off eBay a phone with a "not working LCD":
" This is a used HTC Desire Z smartphone. The item was dropped on water and immediately pulled out. The LCD screen doesn't work anymore as some cable inside is cracked. Everything works fine, touchscreen, menu and the device boots fine, you can hear the sound etc but no image. Anyone can fix this if you have an LCD spare for HTC Desire Z and the phone can be used and works fine, just the LCD needs replacing. Comes with original box, manuals and battery but no charger or data cable. I want to sell this fast so Happy Bidding!"
, also ordered already from two different seller LCD replacement screens neither of them worked. Backlight works on both but nothing else. Im quite puzzled what to do next...
Anyone got any idea?
Please let me know! THanks in advance!

Sounds like some cable is not working, rather than the two screens you've purchased! There is a guide somewhere here for all of that stuff. Best of luck mate!

captainreynolds said:
Sounds like some cable is not working, rather than the two screens you've purchased! There is a guide somewhere here for all of that stuff. Best of luck mate!
Click to expand...
Click to collapse
If you could kindly link that guide, it would be very much appreciated! Thanks!

try searching for ribbon cable. You should prob just take it to a cell phone store. Phone geeks in San Marcos did my repair for 70. I was texting gf while playing golf in pouring rain.
Sent from my SGH-T989 using xda premium

Here is the link to the teardown guide: http://forum.xda-developers.com/showthread.php?t=863919
The flex ribbon cables are not that expensive. If you were comfortable replacing the screen, I would say you have the ability to replace the flex ribbon cable without a problem.

beefynick said:
If you were comfortable replacing the screen, I would say you have the ability to replace the flex ribbon cable without a problem.
Click to expand...
Click to collapse
Im going to order it tonight and give an update as soon as I got the flex ribbon cable.... I assembled and disassembled so many times already soon will be able to do it blindfolded

Also while you have it apart clean the logic board with denatured or pure alcohol and a soft bristled brush. Let it dry completely! That way it won't corrode further from the water damage!

killj0y said:
Also while you have it apart clean the logic board with denatured or pure alcohol and a soft bristled brush. Let it dry completely! That way it won't corrode further from the water damage!
Click to expand...
Click to collapse
I will do that since it will probably take like 2 weeks to ship the flex ribbon from China Thanks Man!

modzsi said:
I will do that since it will probably take like 2 weeks to ship the flex ribbon from China Thanks Man!
Click to expand...
Click to collapse
No prob cheap insurance plus it could even since a current or future problem I do this work for people can you tell lol. Denatured is best otherwise I think 97 is as pure as you'll find. Most stores carry the latter.

Ps be gentle no need to go medieval on it

Replacing the Flex Ribbon Cable solved my problems.... Cheers Everyone!

[Q] Problem changing digitizer

Hi there.I don´t know if this post goes here.Sorry if it doesn´t.I didn´t know where to put it
I was changing the digitizer on my Desire HD and I realize that that I broke the ribbon on the picture.Can anyone help me about what to do?Thanks in advance.

Sadly been there and done that....Only 1 solution-buy another. This process is next to impossible without lots of experience-parts are very fragile! Your best bet is to buy an entire assembly with the digitizer and lcd already attached. Much much easier, but not easy by any means still. Good luck.

rootntootn said:
Sadly been there and done that....Only 1 solution-buy another. This process is next to impossible without lots of experience-parts are very fragile! Your best bet is to buy an entire assembly with the digitizer and lcd already attached. Much much easier, but not easy by any means still. Good luck.
Click to expand...
Click to collapse
Thanks.I´ll do that.

you can fix that.
google ribbon cable fix and follow the procedure
(can't post direct link)
btw.
this you can't fix because the lines are simply too small
(I'm waiting for new LCD)

yamFZ6 said:
you can fix that.
google ribbon cable fix and follow the procedure
(can't post direct link)
btw.
this you can't fix because the lines are simply too small
(I'm waiting for new LCD)
Click to expand...
Click to collapse
A bit complicated for me.I will buy another lcd.Thanks anyway.

Hi again.I change the screen but now the wifi won´t work.I can´t activate the wifi.It says error.It´s like i don´t have a wifi antenna.Any help?

wifi antenna
I think your problem is bigger than an antenna. The antenna is the same one as the gps antenna and is fitted in the panel around the flash leds. If you were to enable the wifi and just could not pick up any access points, then I would say it was your antenna, but if you are receiving an error, it is more likely that either the wifi module is damaged or somehow disconnected.
Do the rest of the radio parts work? i.e. GPS, Cell, bluetooth? Can you tell me exactly what the error is that you are receiving?
Tamagotono

tamagotono said:
I think your problem is bigger than an antenna. The antenna is the same one as the gps antenna and is fitted in the panel around the flash leds. If you were to enable the wifi and just could not pick up any access points, then I would say it was your antenna, but if you are receiving an error, it is more likely that either the wifi module is damaged or somehow disconnected.
Do the rest of the radio parts work? i.e. GPS, Cell, bluetooth? Can you tell me exactly what the error is that you are receiving?
Tamagotono
Click to expand...
Click to collapse
The cell,3g and gps are working fine.Bluetooh and wifi aren´t.When I activate the wifi I get an error message(it just shows "error").When I try to activate the bluetooth it just does nothing.
Thank you

bcm5 said:
The cell,3g and gps are working fine.Bluetooh and wifi aren´t.When I activate the wifi I get an error message(it just shows "error").When I try to activate the bluetooth it just does nothing.
Thank you
Click to expand...
Click to collapse
did you check flex ribbon connection and rips on flex.
(also check volume buttons)

yamFZ6 said:
did you check flex ribbon connection and rips on flex.
(also check volume buttons)
Click to expand...
Click to collapse
You are right.The volume button are not working!I didn´t try them before.What does it have to do with the wifi?I will open it again.

bcm5 said:
You are right.The volume button are not working!I didn´t try them before.What does it have to do with the wifi?I will open it again.
Click to expand...
Click to collapse
not much, but it is simple test for the flex ribbon.
open the phone and check the flex connection too motherboard
worst possible thing is that you ripped the flex ribbon during removal from middle chassis

2 areas worth checking-the reciever jack at the top of the phone CAN be put on in the wrong direction-red wire should be towards the top of the phone, black towards the bottom. The long, all black wire running by the camera is the bluetooth coaxial cable and maybe not on its connector properly-kind of pops on when right-check both ends. It also could be damaged/pinched running up through the phone. It could also just be a bad component on the upper board and that whole board needs replacing-a pain after what you've done already.

bluetooth/wifi and volume buttons not working
I think yamFZ6 is right. You likely have a cable not fully seated or a damaged cable. Both the Bluetooth and wifi are on the same chip so it makes sense that both of them would fail together, the volume buttons are a separate module, so they are likely all on a single cable that has issues.
One last thing to try before tearing it apart again, do a full wipe and see if it works properly. This is a long shot, but worth checking and can help with troubleshooting if you cannot find any cable issues.
Good luck,
Let us know what you find.
Tamagotono

Hi.Sorry for the delay.Been busy with work.I took some pictures of the phone.I don´t know if they will help.
http://img31.imageshack.us/img31/4475/dscf1491c.jpg
http://img837.imageshack.us/img837/4964/dscf1487b.jpg
http://imageshack.us/photo/my-images/163/dscf1488a.jpg/
http://img818.imageshack.us/img818/9624/dscf1483n.jpg

Looks like the black wire (blue tooth coaxial) near the camera is in toward the battery area too far...battery would be pushing in on it every time and could have broken it...admit that's a long shot...but. Starting to feel like a new "upper" circuit board is in order...hope this helps

rootntootn said:
Looks like the black wire (blue tooth coaxial) near the camera is in toward the battery area too far...battery would be pushing in on it every time and could have broken it...admit that's a long shot...but. Starting to feel like a new "upper" circuit board is in order...hope this helps
Click to expand...
Click to collapse
Do you know where to buy it?

I have seen it for sale somewhere out there but can't find out where that was now. I would look for a "parts" phone on ebay. usually you get more than a fair amount of usable other parts with it. I just did this for that exact issue plus I needed a 'mid frame'. I got just about everything else with it also as the lower, main board was the problem with that particular phone, Got a usable digitizer, lcd, case, extra wires, camera etc etc all for around $60. You also get the added luxury of more practice/expertise with assembly.

bcm5 said:
Do you know where to buy it?
Click to expand...
Click to collapse
ebay $38 free shipping

yamFZ6 said:
ebay $38 free shipping
Click to expand...
Click to collapse
Can you pass the link?Thank you.

bcm5 said:
Can you pass the link?Thank you.
Click to expand...
Click to collapse
http://www.ebay.com/itm/Original-Fl...782?pt=LH_DefaultDomain_0&hash=item3f149ef696

Disassemble and reassemble of galaxy nexus :)

I have a few pictures of my galaxy nexus broken down if anyone would like to ask me questions on how and where things go they can. I actually find this phone to be very easy to get apart and if careful can be reassembled in 15 minutes. I was actually replacing my speaker with some old parts I bought off a guy. No more crackling! Anyways in the process grabbed some pics
U can see the first three are the screen bottom speaker, main board, vibe, etc. The last pic she's all back together
Sent from my Galaxy Nexus using xda premium

Somehow I imagined a picture of me tearing down a smartphone where I was photoshopped out and replaced with a picture of a dog in a labcoat saying: "I have no idea what I'm doing"

Yep this phone is one of the easiest ive worked with. had to open mine to replace the earpiece. the only thing to take care of is the volume ribbon and vibrator wires, they can snap off really easily.

IINexusII said:
Yep this phone is one of the easiest ive worked with. had to open mine to replace the earpiece. the only thing to take care of is the volume ribbon and vibrator wires, they can snap off really easily.
Click to expand...
Click to collapse
is the imei sticker that is attached onto the black plastic removable from the main board?

IINexusII said:
Yep this phone is one of the easiest ive worked with. had to open mine to replace the earpiece. the only thing to take care of is the volume ribbon and vibrator wires, they can snap off really easily.
Click to expand...
Click to collapse
Yes sir....I just stuck a razor blade between them and the housing and they come right off connected to a gel like glue. This was good because sticking them back in place they actually stayed. U also have to remove the vibrator motor and the long black wire running down alongside the battery compartment (it has connectors on each end) then of course your two ribbon connectors for main board then one ribbon connector for bottom speaker. Didn't touch cams no need to.....very very easy job in fact it was to easy.

I have to replace my USB board (my USB port was damaged) and I am a newbie doing this kind of service myself. I bought it on ebay:
http://www.ebay.com/itm/OEM-Charger...ltDomain_0&hash=item35bc2f9280#ht_3392wt_1052
Do you think it is possible for someone with no experience to make it? I think I will try it myself, not in the mood to send it to some repair shop and wait 30 days..

juliano_q said:
I have to replace my USB board (my USB port was damaged) and I am a newbie doing this kind of service myself. I bought it on ebay:
http://www.ebay.com/itm/OEM-Charger...ltDomain_0&hash=item35bc2f9280#ht_3392wt_1052
Do you think it is possible for someone with no experience to make it? I think I will try it myself, not in the mood to send it to some repair shop and wait 30 days..
Click to expand...
Click to collapse
Yes for sure...but if u do not feel safe doing it then take it in. I know to get to the usb the whole speaker and housing comes off of the top of that. Which is one screw then a ribbon fairly easy....then u just work something thin in between that and housing like a guitar pic or Mac card. I would go with guitar pic tho so u don't mess the corners of your card up. I know that once the speaker portion is off u see in my first pic the USB I think has its on board. I truthfully did not take that portion of it out thought it was kind of pointless. If u need help I will assist u if u decide to do it yourself

sarni84 said:
Yes for sure...but if u do not feel safe doing it then take it in. I know to get to the usb the whole speaker and housing comes off of the top of that. Which is one screw then a ribbon fairly easy....then u just work something thin in between that and housing like a guitar pic or Mac card. I would go with guitar pic tho so u don't mess the corners of your card up. I know that once the speaker portion is off u see in my first pic the USB I think has its on board. I truthfully did not take that portion of it out thought it was kind of pointless. If u need help I will assist u if u decide to do it yourself
Click to expand...
Click to collapse
Thanks, I think I will try it myself, just have to wait for it to arrive.

juliano_q said:
Thanks, I think I will try it myself, just have to wait for it to arrive.
Click to expand...
Click to collapse
Yea dude pm me and I'll definitely help out

Thats pretty neat man, do you know where the GPS chip is?
I replaced my back cover and apparently I damaged the GPS chip cause I have NO gps lock, software side its ruled out (I flashed many diff ROMS, kernels and Radios and it used to work well before I opened up my Gnex)
Thank you.

where is the VZ LTE radio? maybe i can swap mine out for one that doesnt cause signal drops.

Sergio PC said:
Thats pretty neat man, do you know where the GPS chip is?
I replaced my back cover and apparently I damaged the GPS chip cause I have NO gps lock, software side its ruled out (I flashed many diff ROMS, kernels and Radios and it used to work well before I opened up my Gnex)
Thank you.
Click to expand...
Click to collapse
The battery cover? Hmmmm. I am pretty sure the GPS chip is on the opposite side of motherboard. Looking at ifixit photos it says right by rear camera on the opposite side of motherboard.
Edit...also if u look at first pic in my pictures look on right side of battery compartment . See the black wire with the connectors on each end? I wonder if the connector closest to bottom came loose or has something to do with it

10roller said:
where is the VZ LTE radio? maybe i can swap mine out for one that doesnt cause signal drops.
Click to expand...
Click to collapse
Not sure I have GSM model. And dude good luck with that unless u know how to solder chips on to motherboards that is nearly impossible and I think swapping a lte chip for another lte chip won't solve your problem

sarni84 said:
The battery cover? Hmmmm. I am pretty sure the GPS chip is on the opposite side of motherboard. Looking at ifixit photos it says right by rear camera on the opposite side of motherboard.
Edit...also if u look at first pic in my pictures look on right side of battery compartment . See the black wire with the connectors on each end? I wonder if the connector closest to bottom came loose or has something to do with it
Click to expand...
Click to collapse
Thanks, appreciate your time.
I checked out ifixit, thinking that in the process of removing the cover I could of hit the GPS chip or something, but since you pointed out that its on the opposite side of the motherboard that's not a possibility. Since I have not removed the mother board.
I have not opened it again, afraid of ruining something else.
But I guess I will have to in order to check the wire you speak about.
Salutations

I sent my phone in for repair to Samsung via Expansys for a bad external speaker. Back when it went bad, phone was too new to have all parts available as spares on the net plus the phone was still under warranty so I send it back to Samsung via Expansys-usa. But what I think happened is that Expansys didn't send it to Samsung and repaired it inhouse. I can say that because all screws inside the phone had chewed up heads and the repair didn't look good however the external speaker was working. First thing I found out that external volume rocker was not working anymore. So I send it back again to Expansys and I just received it back today with a note saying that the volume rocker ribbon pins have come away from the main board and taken the pin with them.
Bottom line is that they didn't repair the phone. Any ideas on how I can get this fixed? Do I have to change the ribbon? if I want to do it myself or this sort of damage requires a new board?
Any ideas comments are appreciated.
Edit: Link to photo showing the pins that are separated from the board

sarni84 said:
I have a few pictures of my galaxy nexus broken down if anyone would like to ask me questions on how and where things go they can. I actually find this phone to be very easy to get apart and if careful can be reassembled in 15 minutes. I was actually replacing my speaker with some old parts I bought off a guy. No more crackling! Anyways in the process grabbed some pics
U can see the first three are the screen bottom speaker, main board, vibe, etc. The last pic she's all back together
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
Hi Sarni,
I accidentally snapped the ribbon (refer to attached pic, circled in red), and now my speaker is not working anymore. I guess that ribbon was for connecting the speaker and headphone jack? . What do you think i should do now, replace the whole piece?
I also intend to replace my damaged charge port, but not sure how to proceed for that.
Thanks,
Dennis

Changing the charge port on SM-T800 is relatively easy....

... if you don't do something stupid like I did. If you pay attention, research, watch videos, etc, you won't do what I did. I found a charging port on amazon that came with the tools needed to get the job done for about $15. I opened the case and all went well up to the point that I needed to disconnect the old piece. I followed all directions up to disconnecting the wide connection. There are 2. One right next to the port and the other at the opposite end of the ribbon cable. Not paying a bit of attention to what I was doing, instead of popping up the little latch that holds the cable down, I pried up the ribbon cable. Thus breaking off the connector that is soldered to the board. Now, I have a tablet that works until the battery dies.
Moral to the story, pay attention. Replacing the port is easy. Just pay attention.
Now, does anyone know if the connector can be replaced? Can I get a new board? Or am I out $400+?!

Follow-up question. I am looking around and it looks like I can get a replacement motherboard. Before I spend the money on a new motherboard (and hopefully not break this one), how will it function? I am rooted. Will I be starting from scratch with a stock tablet? No OS at all? Just fine and still rooted?
Thanks.

Bdozier said:
Follow-up question. I am looking around and it looks like I can get a replacement motherboard. Before I spend the money on a new motherboard (and hopefully not break this one), how will it function? I am rooted. Will I be starting from scratch with a stock tablet? No OS at all? Just fine and still rooted?
Thanks.
Click to expand...
Click to collapse
Did you ever find a solution? I just did the same thing. I was trying to be careful - but that top piece just broke right off of the connector to the motherboard. Am I screwed?!

arl16 said:
Did you ever find a solution? I just did the same thing. I was trying to be careful - but that top piece just broke right off of the connector to the motherboard. Am I screwed?!
Click to expand...
Click to collapse
What piece broke off? You might be in luck cause i have 3 tab s's taken apart right now and can probably send you the part you need. Can you pm a picture of the part you broke? The charging port is connected to a cable and i just had it apart. What did you break on it?

mikep2323 said:
What piece broke off? You might be in luck cause i have 3 tab s's taken apart right now and can probably send you the part you need. Can you pm a picture of the part you broke? The charging port is connected to a cable and i just had it apart. What did you break on it?
Click to expand...
Click to collapse
Wow - that would be awesome. Truth be told, I'm doubting this is something I'll be able to do myself, but I'm about to have a dead/useless tablet, and nothing to lose. So I'm willing to try!
Thanks!

Here are the broken pieces. In case anyone is thinking about doing this - they're very fragile!
Again, not sure about my ability to take the piece off of the motherboard, and/or attach a replacement.
Anyone ever try it before? I'm hoping I wouldn't have to take the motherboard out and/or solder anything!

arl16 said:
Here are the broken pieces. In case anyone is thinking about doing this - they're very fragile!
Again, not sure about my ability to take the piece off of the motherboard, and/or attach a replacement.
Anyone ever try it before? I'm hoping I wouldn't have to take the motherboard out and/or solder anything!
Click to expand...
Click to collapse
Unfortunately the motherboard i have is broke and it doesnt start up. I thought it was the charging port so i cant help you out. You can buy a new board for 99 dollars though or just buy a used broke one off ebay and switch the board out. It is very easy to do and there are videos on you tube. People have used ones for cheap with broke lcds or screen burn. Buy one of those and switch out the top board cause that is all you need. I have all the other parts but my main board has something wrong with it. If you do that just make sure you get the same model number cause i just bought a verizon one and the motherboard wont work with my att one. I have 2 att ones that i was able to swap out.

arl16 said:
Here are the broken pieces. In case anyone is thinking about doing this - they're very fragile!
Again, not sure about my ability to take the piece off of the motherboard, and/or attach a replacement.
Anyone ever try it before? I'm hoping I wouldn't have to take the motherboard out and/or solder anything!
Click to expand...
Click to collapse
You know i might have got my 1 tablet working and if it is i can send you the board. I will let you know tomorrow.

mikep2323 said:
You know i might have got my 1 tablet working and if it is i can send you the board. I will let you know tomorrow.
Click to expand...
Click to collapse
Awesome - thanks!

Wireless Charging Hardware Mod?

Hi,
I received this phone a few days ago and I am still disappointed that is does not have wireless charging although the back is glass and not metal. I wonder if anyone has tried a hardware mod with something like this. I also saw that there are some external solutions utilising the charging port but I would very much prefer to have that uncovered and I imagine that the linked circuit is way smaller.
I would try it out if no one else did it before if there's a chance of success, so the main question is if there's enough room inside the case and if these three connectors are compatible in general, soldering is no problem if necessary.

you can buy nillkin case wireless charging enabler with tag on aliexpress.com

Brom2 said:
Hi,
I received this phone a few days ago...
Click to expand...
Click to collapse
Hi, were you successful in any way?

I didn't continue to investigate because I think there might not be enough room behind the battery for the coils. Also getting the connection to the battery/phone right could be really tricky because everything is so small.