Develop Bugs

[Q] Unglued cable digitizer Samsung Galaxy Note 2

Hello!
I just finish to "unglued" my digitizer cable on my note 2 ,
Please, just take a look at the picture, maybe can I do something to put it back.
Look like unglued..have you any idea if that flex cable it's glued or soldered ?
Thank you very much.

Wow.. I just did the exact same thing yesterday.. same spot on the cable and everything. I did it when I was replacing the glass.. I've tried taping it back.. and now I've tried gluing it , the touch kinda works but really inconsistent and annoying. I've spent way too much time trying to fix it and think I'm just gonna sell as parts now. What did you end up doing? Any luck getting it reattached? If you were successful please let me know what you did.

tri0xinn said:
Wow.. I just did the exact same thing yesterday.. same spot on the cable and everything. I did it when I was replacing the glass.. I've tried taping it back.. and now I've tried gluing it , the touch kinda works but really inconsistent and annoying. I've spent way too much time trying to fix it and think I'm just gonna sell as parts now. What did you end up doing? Any luck getting it reattached? If you were successful please let me know what you did.
Click to expand...
Click to collapse
For me, was no way to put back this flex cable... and I think its close to impossible to make something good with this display.
I just stored that display ....for don't throw it.
Good luck!

this is a usual ribbon cable. i teared mine replacing the screen... will try to replace it and report back.
maybe it will require light smd oven soldering and that will suck big time. maybe i can just pressure it down somehow. your cases are much better, you still have the original cable and half of it is already soldered making it much easier to solder the rest.

gcbxda said:
this is a usual ribbon cable. i teared mine replacing the screen... will try to replace it and report back.
maybe it will require light smd oven soldering and that will suck big time. maybe i can just pressure it down somehow. your cases are much better, you still have the original cable and half of it is already soldered making it much easier to solder the rest.
Click to expand...
Click to collapse
I have do the exact same thing,
Is this going to work?
cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=140945664484&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en
Thanks

Goathier said:
I have do the exact same thing,
Is this going to work?
cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=140945664484&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en
Thanks
Click to expand...
Click to collapse
probably. i hope you haven't glued the glass already
edit, actually that one probably have that ribon cable already attached. i can only see the plug that clips on the motherboard(?)... not sure that is what you want

Goathier said:
I have do the exact same thing,
Is this going to work?
cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=140945664484&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en
Thanks
Click to expand...
Click to collapse
thats not the same part, the part u listed on ebay is for the stylus. U can easily tell its not the same part as shown in the original post. Check out this youtube video at the 20:50 minute mark, it will show u the exact parts and u can tell. Youtube: https://www.youtube.com/watch?v=bxgZeb5QytM
Unfortunatly the part the original poster pictured is part of the digitizer and is near impossible to fix once ripped. all ive been able to find online is that ribbon cable being sold with the digitizer itself. If anyone else actually finds the part shown in the original post please do post back.

[Q] Please help! Strange problem with my HOX

Yesterday i dropped my device from one feet. It turned off and i turned it on.
Now lower part of screen and capacitative buttons dont work. i will attach a image(non-working area outlined in red)
My warranty has expired so i cant exchange it for a new one. What should i do? Can i fix it by myself?
Please help me

Fycola123 said:
Yesterday i dropped my device from one feet. It turned off and i turned it on.
Now lower part of screen and capacitative buttons dont work. i will attach a image(non-working area outlined in red)
My warranty has expired so i cant exchange it for a new one. What should i do? Can i fix it by myself?
Please help me
Click to expand...
Click to collapse
Hi,
Only thing I can think of is that somehow it has damaged the cable from the touchscreen or the tiny wires that feed into the cable without damaging the screen. I came across a brand new screen I was replacing once for someone that had a similar problem where the bottom left hand corner wouldn't respond to touch unless there was firm pressure on the screen to create contact, and this was a brand new screen. It could also be that the touchscreen connector needs to be pushed back onto the board if it's come a bit loose.
If this is the problem, you can fix it by yourself although I'd have a good look around youtube, there are heaps of DIY videos of how to replace screens. If you do go down this path I recommend you replace the touchscreen/LCD/LCD frame in one go, as it's generally already pre- assembled the only thing here is that there are 3 brands of LCD's HTC used with the phone and they aren't all compatible, and you can only tell by pulling down your phone and looking at the LCD flex cable colours, and the other thing is that the screens that are available aren't always the same quality as the original. If this sounds to hard your best bet is to take it somewhere and diagnose the problem just in case it's something else

[Q] Touch issue

Hello
I just replaced the screen on my nexus and now the touch won't work. It doesn't respond to anything, maybe you guys have some ideeas . Maybe you can see something wrong in the photos I've attached (sorry for potato quality).

Ohmanwhy said:
Hello
I just replaced the screen on my nexus and now the touch won't work. It doesn't respond to anything, maybe you guys have some ideeas . Maybe you can see something wrong in the photos I've attached (sorry for potato quality).
Click to expand...
Click to collapse
Did you replace the combo or just the touchscreen? Did you test it before when everything hooked up before taping it to the bezel? What kind of tape did you use? You may want to post a higher resolution thumb of the area where the ribbons connect to the board.

graphdarnell said:
Did you replace the combo or just the touchscreen? Did you test it before when everything hooked up before taping it to the bezel? What kind of tape did you use? You may want to post a higher resolution thumb of the area where the ribbons connect to the board.
Click to expand...
Click to collapse
Nope I didn't test it but I put some tape that is easy to remove so i just removed it checked all connections, nothing seems wrong. I attached some new photos (best quality i can get right now). Also I replaced the full combo lcd+touch. Thanks for the reply.

Ohmanwhy said:
Nope I didn't test it but I put some tape that is easy to remove so i just removed it checked all connections, nothing seems wrong. I attached some new photos (best quality i can get right now). Also I replaced the full combo lcd+touch. Thanks for the reply.
Click to expand...
Click to collapse
Nothing looks out of the ordinary in those pics, though I don't see how one can replace the combo without removing the boards. Can you explain that as some step in the procedure might cause this. Instead of guessing too much, let's take one thing at a time.

graphdarnell said:
Nothing looks out of the ordinary in those pics, though I don't see how one can replace the combo without removing the boards. Can you explain that as some step in the procedure might cause this. Instead of guessing too much, let's take one thing at a time.
Click to expand...
Click to collapse
I can't post links so you can search youtube for "Nexus 7 Screen Replacement 2013 model, replace the glass and fix the LCD - Repairs UK" and that's how I did it. And the thing I know I'm missing is the tape he takes off at min 2:43.

Ohmanwhy said:
I can't post links so you can search youtube for "Nexus 7 Screen Replacement 2013 model, replace the glass and fix the LCD - Repairs UK" and that's how I did it. And the thing I know I'm missing is the tape he takes off at min 2:43.
Click to expand...
Click to collapse
Any revision number on the digitizer? I know that there are different revisions of the daughter board and that if your tablet came with a 1.3 board and you replaced it with a 1.4 board the touch would not work, but I don't know if it is the same for the touch screen
Sent from my Nexus 7 using XDA Free mobile app

Ohmanwhy said:
I can't post links so you can search youtube for "Nexus 7 Screen Replacement 2013 model, replace the glass and fix the LCD - Repairs UK" and that's how I did it. And the thing I know I'm missing is the tape he takes off at min 2:43.
Click to expand...
Click to collapse
I looked at the clip, and it seems ok, except the emi tape hanging from the frame would not stick to the back of the lcd that way. I don't know that it should make a difference since yours is totally unresponsive to any touch. Same case with the missing one going on top of the touchscreen connectors.
There have been cases with other Asus models where you'd need to re-flash the touch firmware before it works. If the daughter board had been working before you replaced the screen, you can either (1) re-flash a stock rom (444 to be sure) using fastboot, or (2) if you're on custom Kitkat (I don't know about Lollipop), re-flash said firmware following the instructions HERE. Remember you have to have one of those kernels mentioned therein installed for the firmware to stick.
I don't know that the touchscreen version should make a difference since they all use the same rom wih the same touch firmware embedded. Unless the rom contains many versions that would automatically select one fitting your hardware version, in which case you should flash the official Kitkat.
Failing all the above, I'd conclude the touchscreen itself is bad. It's a rare occurrence, but has been known to happen. If you bought it from a reputable seller, you should be able to get a replacement. Don't hesitate to ask if something is unclear. Good luck.

I have the same problem. I bought two digitizers and lcd, and both times the problem is the same. I checked for a rev number on the digitizer, but with no luck. The tape I used was M3 300LSE. Already flashed 4.4.4 stock firmware on Flo kernel, but it didn't work.
I can't believe I bought TWO broken digitizers from two different sellers. I will retry the flash...

I tried to see if there is any recognizable serial number on digitizer, and I explain what I found here: http://forum.xda-developers.com/nex...xus-7-2013-touch-screen-unresponsive-t3035124
I'm sorry I'm posting about same issue in two different threads, i did open the other one cause I didn't see this one...

Black screen, only backlight works. Everything else is ok.

Hi
Sorry for my english, I'm hungarian, this is the best I can do.
So I bought a cheap (but not too cheap) SM-P905, but I can't get the screen to work properly.
The touch layer, the spen, the backlight works well, I managed to mirror the screen on my pc and everything else seems to be okay.
I got off the back cover, I tried to unplug and reattach every flex cable, even the battery. I tried to look everything under magnifying glass to see what could be the problem.
The lcd flex connector looks like this under my lens.
(Upload it in the next post, not working from the android app)
I tried to clean it with a needle, but it still looks like it is corroded or melted.
Is it possible that replacing this connector will get the screen back to normal? (I found flex connector replacement on the internet)
Or is it possible to repair it with some jumpers or something like this?
Is it melted because of some shorted circuit somewhere else, or because of a bad micro capacitor?
How and where can I locate and resolve this problem (s)? Maybe is it still the lcd that is simply dead and I can't bring it back to life?
I dont want to buy a screen, and a motherboard (neither only one of them )
Thank you for your help!

Okay the forum doesnt let me to insert links or photos, because I'm new here -.-
/s/53oab9sykbihn32/20151021_175009.jpg?dl=0 write dropbox dot com in front of link

https://www.dropbox.com/s/53oab9sykbihn32/20151021_175009.jpg?dl=0
In my opinion it died!!

I hoped for better opinions
I wanted to know how this thing can die?
It has to be caused by something.
Bad resistor/capacitor? Is it on the motherboard or on the lcd's circuitboard?? Or is it only the corroded flex connector??
I dont want to throw the whole tablet in the trash. Everything else is just operating fine.
If nobody can answer this, where should I write, where people can help with these very small components / resoldering / measuring what gone wrong here?

Alan-B said:
In my opinion it died!!
Click to expand...
Click to collapse
So today I measured the pins in worst condition. There are 2 pins that I tought can cause the problem and looks corroded. (Number 5 and 9 from the right) Both of them !are not used!. (There is a total of 3 pins that are not used on the connector/cable)
They are not lead through the flex cable, they have no function here.
So the problem comes from somewhere else, but I still don't know why they look like this.
Maybe I will try to seperate the screen from the body and look at it closer and its connectors/smaller circuit boards.
Sent from my SM-N9005 using XDA Free mobile app

Hmm, that pic does not make me think its a corrosion problem. At best, it can lead to a finicky connection, but there seems to be enough there for proper electrical contact. If this were a headphone jack, for example, I would say apply pressure near the cable to see if the headset works properly, and if it does, then I know its a cable problem. No idea if you can try to apply pressure to the cable and see if the LCD turns on.
If the screen mirrors on the TV successfully, then there are a bunch of Samsung Service Codes you can use to test the LCD. Unfortunately I do not know them for this model, but google should get you the service menu very easily. There is definitely a test in there for the LCD that should give you a better idea what to expect.
If the cable is pretty cheap, I would also just pick up one and try replacing. Nothing to lose! AND if you have access to another identical device, you can try to stick this LCD on that device to see if its the LCD thats the problem or the motherboard.
Lastly, I would want to know if the glass on that LCD has ever been replaced. If they did a glass only replacement, its possible they overheated the LCD ... OR used too much LOCA glue that shorted the connectors.
Many possibilities, so I wouldn't call it a day yet. First, look for the service menu, thats the best place to begin.

I will try the service codes.
Unfortunately I don't have more devices. The easiest way would be to test the identical parts on a working one, but I don't know anyone who would risk his/her tablet for this
The other thing I can do is to get another lcd-glass unit from ebay or from ifixit and try it. If the problem was the lcd, it should work, I'm happy, but if its black, I will have (maybe) 2 working lcd units for sale. Or I have to get a new motherboard (sounds expansive).
I don't think that they replaced the glass on this device, it looks very used and scratchy, so it was working before.
Thank you for taking your time for me and answering my dumb questions!!
Sent from my SM-N9005 using XDA Free mobile app

There are more good news than bad, so I'm very happy.
So 1-2 days ago I started to get off the screen to see if I can seperate the LCD from the receiver. Turned out its not that hard. The only hard thing is to get it off the body in one piece. Lots of heating with a hair drier, and a LOT OF PATIENCE. If you can get it off in one piece you are on your way.
Seperating the glass from the LCD is very easy, did it in 10 minutes, I don't think it needs heating...
So I did it, then I saw some water damage (white things) on the back side of the LCD. There is a small board here too, so I cleaned the white thing off with some alcohol.
Then I put the lcd back and voilá, Its WORKING!!!
The only problem is that I damaged the touch screen glass, so I need to order a new one, but its under 20$ so no problem.
Thank you all for your help, I hope that I finished here
Sent from my SM-N9005 using XDA Free mobile app

Good to know! Thank you for the update

Other solution is remove battery five minute and reconnect battery

Screen Problem

A friend of mine has a problem with his screen, see pics, it very strange and its somehow related to the SoM not the screen - I ve swapped the SoM for the one in my unit and the problem is cured on his unit but mine has it, I swapped them back and mine is fine but his has this problem.
It was on 5.1.1. and I ve tried several versions of 5.1.1. and several versions of 4.4.4. but I always get the same problem.
Any suggestions ?

Have I found the cause I wonder ? In the attached pic you can see a splodge of solder on what I m going to guess is the video output controller or something.

typos1 said:
Have I found the cause I wonder ? In the attached pic you can see a splodge of solder on what I m going to guess is the video output controller or something.
Click to expand...
Click to collapse
Who would carelessly drip solder into the unit? if it were to drip somewhere vital it would have fried or fry your car wires, even worse catch on fire.

alukarulz said:
Who would carelessly drip solder into the unit? if it were to drip somewhere vital it would have fried or fry your car wires, even worse catch on fire.
Click to expand...
Click to collapse
Theres no solder anywhere else and I dont think it dripped past the lid and the DVD player leaving no trace, I think someone was working on it for some reason or maybe bad quality control at the factory.

Did removing the solder splash resolve the issue?

marchnz said:
Did removing the solder splash resolve the issue?
Click to expand...
Click to collapse
Not done it yet, gonna try later . . .

I am interested too I've got the exact same problem. Pumpkin send me a new screen even though I've got no warranty anymore and the problem disappeared. Sadly this new screen is without a flex cable for the touchscreen so commands were not possible.

Draiden said:
I am interested too I've got the exact same problem. Pumpkin send me a new screen even though I've got no warranty anymore and the problem disappeared. Sadly this new screen is without a flex cable for the touchscreen so commands were not possible.
Click to expand...
Click to collapse
Yes, but the problem on my friend's unit is not screen related.
Why cant you use the cable from your old screen ?

typos1 said:
Yes, but the problem on my friend's unit is not screen related.
Why cant you use the cable from your old screen ?
Click to expand...
Click to collapse
Okay but screen issues are exactly the same.
The new screen has only one flex cable it's working but touch commands are not recognised. And the old screen has two flex cables.
Edit: I don't know if the new screen suffers the same problem because I had it running for only one minute and the screen issues are randomly.

marchnz said:
Did removing the solder splash resolve the issue?
Click to expand...
Click to collapse
Yes, it did !!
Half an hour of holding a soldering iron to a piece of copper braid and rubbing them over the solder/components covered in solder sorted it !
I used an iron that isnt quite hot enough to melt the solder used on these devices and it melted the solder splash easily, suggesting it was household solder or solder left by someone after the unit left the factory.
Still it was an excruciating half an hour - I thought all that heat my damage the SoM and maybe possibly remove components.

Draiden said:
Okay but screen issues are exactly the same.
The new screen has only one flex cable it's working but touch commands are not recognised. And the old screen has two flex cables.
Edit: I don't know if the new screen suffers the same problem because I had it running for only one minute and the screen issues are randomly.
Click to expand...
Click to collapse
Your old screen assembly is the screen + touchpanel. That is why there are two flexcables. One for the screen, one for the touchpanel. Your new screen assembly is the screen only.
You would have to move the touchpanel from the old to the new screen. However, that could be very difficult when the touchpanel surface is fully glued to the screen surface. If you're lucky the touchpanel is only attached along the edges. Then you might be able to remove it and stick it to the new screen.
Easiest way is to contact Pumpkin and ask them to send you the full assembly, so screen + attached touchpanel.

Mau2012sim said:
Your old screen assembly is the screen + touchpanel. That is why there are two flexcables. One for the screen, one for the touchpanel. Your new screen assembly is the screen only.
You would have to move the touchpanel from the old to the new screen. However, that could be very difficult when the touchpanel surface is fully glued to the screen surface. If you're lucky the touchpanel is only attached along the edges. Then you might be able to remove it and stick it to the new screen.
Easiest way is to contact Pumpkin and ask them to send you the full assembly, so screen + attached touchpanel.
Click to expand...
Click to collapse
Pumpkin are just sellers, it may be better to contact the factory direct, mighty be cheaper too.

Yes thanks for your answers