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.
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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.
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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
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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
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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]What went wrong?

I have a huge problem, basically I was sick and tired of my black housing for the phone, so I ordered the white one from ebay. I was so happy it came that I forgot to shut down the phone, well during half way of the work, while I was trying to pry it open I remembered and turned it on and it worked I opened it a bit more open and it suddenly went black and since then everything is working except the LCD.
I have no idea whats the problem is the LCD broke or what?
Also when it shut down and me trying to reconnect the LCD flat cable to see if thats the problem I was nervous and did that which you see in the picture. Now my issue is what if I buy a new screen connect it and it doesn't work because the FPC connector?

Silthrax said:
I have a huge problem, basically I was sick and tired of my black housing for the phone, so I ordered the white one from ebay. I was so happy it came that I forgot to shut down the phone, well during half way of the work, while I was trying to pry it open I remembered and turned it on and it worked I opened it a bit more open and it suddenly went black and since then everything is working except the LCD.
I have no idea whats the problem is the LCD broke or what?
Also when it shut down and me trying to reconnect the LCD flat cable to see if thats the problem I was nervous and did that which you see in the picture. Now my issue is what if I buy a new screen connect it and it doesn't work because the FPC connector?
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The connection pins themselves do not look damaged, on the plastic shroud. The socket should work fine.
It's a little hard to make out fine detail in the pic...take a magnifying glass to it and check for cracks or splits in the pins.

Tigerlight said:
The connection pins themselves do not look damaged, on the plastic shroud. The socket should work fine.
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Hmm it seems like it goes one small one then longer one, its hard to see from he picture but I think two of the longer ones are missing. And what should be the problem with the LCD because that happened before I damaged the socket.
Between thank you for the fast reply.

Silthrax said:
Hmm it seems like it goes one small one then longer one, its hard to see from he picture but I think two of the longer ones are missing. And what should be the problem with the LCD because that happened before I damaged the socket.
Between thank you for the fast reply.
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Well I don't see any missing pins, but you'll have a better view.
As for you LCD...no idea. Generally it's a good idea to turn everything off before you open electrical equipment. You could have caused a short in the process of opening it live.

Tigerlight said:
Well I don't see any missing pins, but you'll have a better view.
As for you LCD...no idea. Generally it's a good idea to turn everything off before you open electrical equipment. You could have caused a short in the process of opening it live.
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Would that be on the motherboard or the LCD, basically should I bother repairing it or just sell it for spare parts thats my issue right now.

Silthrax said:
Would that be on the motherboard or the LCD, basically should I bother repairing it or just sell it for spare parts thats my issue right now.
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If you try to power it on does the vibrate activate...basically does it do everything you'd expect EXCEPT the screen doesn't work or does it do nothing at all?

Tigerlight said:
If you try to power it on does the vibrate activate...basically does it do everything you'd expect EXCEPT the screen doesn't work or does it do nothing at all?
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Like I said earlier everything works, I can still receive SMS, phone calls (I can answer them since the digitizer works), e-mails, Facebook msgs, vibrations, sound, microphone... Everything works except the LCD.

Silthrax said:
Like I said earlier everything works, I can still receive SMS, phone calls (I can answer them since the digitizer works), e-mails, Facebook msgs, vibrations, sound, microphone... Everything works except the LCD.
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Click to collapse
You might try replacing the LCD and hope you haven't damaged the connector. If you have, a self-repair is unlikely given its size and that of the pins.
Or you dump it and buy a new phone.
Either way it's gonna cost you money. The first is cheaper but may not work.
I think that's your only options.

Yeah I knew from the start it was gonna cost me money, but I wanted the cheapest way out
Thanks a lot for the help I think I am gonna try to fix it. Get some experience while doing it too

Silthrax said:
Yeah I knew from the start it was gonna cost me money, but I wanted the cheapest way out
Thanks a lot for the help I think I am gonna try to fix it. Get some experience while doing it too
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Hey did you ever figure out the connector issue? Same problem

Replacing screen plus digitizer

Hello guys I have a tmobile s4 that the screen is scratched and it has a small hairline cracked on top. I was wondering if I can take the screen from my Verizon s4 (which I don't need anymore) and put that screen on my tmobile s4 and put the screen from the tmobile s4 to the Verizon s4. Basically can I swap screens with the whole digitizer and all ?

I've replaced my screen / digitizer and there is nothing specific between the two carriers regarding the screen / digitizer. So I would assume that it can be done. The screen / digitizer combo connects to the motherboard via. a ribbon cable which is easily removed. The harder part of the operation is going to be removing the working screen / digitizer from the housing. You may want to consider swapping the motherboards between the two. Either way good luck on the repair.

vinniej said:
I've replaced my screen / digitizer and there is nothing specific between the two carriers regarding the screen / digitizer. So I would assume that it can be done. The screen / digitizer combo connects to the motherboard via. a ribbon cable which is easily removed. The harder part of the operation is going to be removing the working screen / digitizer from the housing. You may want to consider swapping the motherboards between the two. Either way good luck on the repair.
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So what your saying is that I can keep the screen and the frame on my Verizon s4 and just move the motherboard from my tmobile one to it ? That's all I have to do ?

Jaimesco12 said:
So what your saying is that I can keep the screen and the frame on my Verizon s4 and just move the motherboard from my tmobile one to it ? That's all I have to do ?
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Yep. The hardware should all be the same (i.e. cameras {front/back}, prox sensor / earphone assembly, USB / home button / menu / back button assembly, etc.). Just be sure to gently lift all your connectors to the motherboard and swap them.

vinniej said:
Yep. The hardware should all be the same (i.e. cameras {front/back}, prox sensor / earphone assembly, USB / home button / menu / back button assembly, etc.). Just be sure to gently lift all your connectors to the motherboard and swap them.
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Okay so I'm looking at a video here on how to replace a motherboard. Basically the same procedure just switching it right ? Well I'm gonna give it a try then hopefully I don't ruin them [emoji28]

vinniej said:
Yep. The hardware should all be the same (i.e. cameras {front/back}, prox sensor / earphone assembly, USB / home button / menu / back button assembly, etc.). Just be sure to gently lift all your connectors to the motherboard and swap them.
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http://youtu.be/BGLD7Gpl0Uk just like this right ?

Jaimesco12 said:
http://youtu.be/BGLD7Gpl0Uk just like this right ?
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Yep...Right around the 3:40 mark it shows the removal of the mobo. Good luck!

vinniej said:
Yep...Right around the 3:40 mark it shows the removal of the mobo. Good luck!
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So just the motherboard and the radio ? How about the bottom part were the button keys are at should I leave that or switch it too?

Jaimesco12 said:
So just the motherboard and the radio ? How about the bottom part were the button keys are at should I leave that or switch it too?
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I'd leave it. just swap motherboards and you should be good to go.

vinniej said:
I'd leave it. just swap motherboards and you should be good to go.
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And the radio too right since I have the tmobile one and the other one is verizon

vinniej said:
I'd leave it. just swap motherboards and you should be good to go.
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Click to collapse
Didn't work the Verizon s4 and the tmo s4 don't match up. Ended up ruining the whole charge port flex. Maybe next time I'm gonna have to ask in multiple forums

There should be no differences between the charging ports on either phone. Sorry you had an issue.

vinniej said:
There should be no differences between the charging ports on either phone. Sorry you had an issue.
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The digitizer were you attach the charging flex were different sizes open one yourself and you will see they don't match up I even tried to attach it as is and it turned on but the cord was hanging there because it's not the same size and I could only got 4G and not lte so now I'm just waiting for the replacement part to come so I can fix it

Unit is working but screen is black - OFF

I have a KGL unit with RK3188 quad core CPU and 1024x600 screen.
I was working with custom ROM (made by Malaysk)
I didn't update anything recently.
Suddenly that morning, the screen is black.
I am able to hear the radio, and Bluetooth calls are being transferred through the unit, but the screen is totally black, zip, nada, nothing at all.
Any ideas what could get wrong?

I've had this happen before also. Do you see any boot logo at all?
Dave

I see nothing at all. Black all over the way.No logo
Sent from my A0001 using XDA-Developers mobile app

that is a hardware failure
contact yoru seller

unfortunately, the seller completely ignores my messages.

amir77a said:
unfortunately, the seller completely ignores my messages.
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Did you tried to enter the recovery or it is shows black screen also?
If yes, maybe your display panel is wrong. If you seller ignore your messages, try to check your panel's contact to the board.

Check to see if you can get into recovery. If screen works, turn off lights when in rom. I had issue with auto brightness which was too low. Only way I could fix was to wipe and reinstall and turn off auto brightness.

Just updating... it was a hardware problem.
Flat cable problem + certain transistor.
Thanks for your comments.

How did you figure it out?
Dave

TT_Vert said:
How did you figure it out?
Dave
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The buttons were OK, I was able to listen to radio, switch stations (via the wheel control), and even BT calls went through.
That made me guess that this is a hardware problem, and not software.

and no matter what you did you never got video ? Ive got this same problem but after a hard reset Ill get the video back sometimes.

TT_Vert said:
and no matter what you did you never got video ? Ive got this same problem but after a hard reset Ill get the video back sometimes.
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Actually, I even didn't try to hard reset the unit.
Took it from my technician, and it was working, without any hard reset.
To be precise, I'm going to visit him again tomorrow, since the colors on the screen are a bit on the green side, and a bit smeared.
Not a disaster, but not as it should be.
I guess one of the flat cables inside the unit, is not in its place.

amir77a said:
Actually, I even didn't try to hard reset the unit.
Took it from my technician, and it was working, without any hard reset.
To be precise, I'm going to visit him again tomorrow, since the colors on the screen are a bit on the green side, and a bit smeared.
Not a disaster, but not as it should be.
I guess one of the flat cables inside the unit, is not in its place.
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Did the technician just reseat the cables or was something actually replaced?

jakejm79 said:
Did the technician just reseat the cables or was something actually replaced?
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At first replcaed something... the second visit, probably things were a bit loosen up...

amir77a said:
At first replcaed something... the second visit, probably things were a bit loosen up...
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Any chance you could get details on what was replaced?

I had a similar issue - would lose screen output, it would go either black or white. Touch screen would still work, and radio/BT as well.
Then I'd disconnect the flat cable and reattach it, and it would work for a couple of days. Final solution (it seems) was to hold the flat cable with tape/hot glue!

Thank you, mine just went out again, it was fine for a month or so after reseating all the ribbon cables in the ZIF connectors, I'll do it again tomorrow and try securing them with some tape.

markinhosmrk said:
I had a similar issue - would lose screen output, it would go either black or white. Touch screen would still work, and radio/BT as well.
Then I'd disconnect the flat cable and reattach it, and it would work for a couple of days. Final solution (it seems) was to hold the flat cable with tape/hot glue!
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did you reattach the flat cable with the radio on or off please help me because my head unit had became with black screen but the radio function normaly

Same symptoms here, any updates on what to look for? screen isn't even dim, touch works, sound works, it connects to my hotspot, but no visible screen, Witson PX5.
Which transistor ? I have a multimeter handy

Motherboard replacement

Hi everyone,
I will explain as fast as possible : I have 2 OnePlus 3. One with a freeze problem (https://forum.xda-developers.com/oneplus-3/help/strange-issue-op3-t3699715=) and the second one with damaged screen but everthing working. So what if I put the motherboard of the broken screen one in the model with the freeze problem. Do you think it can works ?
Thx for reading ! And sorry for the english.

Watch JerryRigEverything teardown videos and try it and keep us updated I'm curious of the result. It'll probably work because basically what you're going to do is changing the broken screen with a solid one. (Changing motherboard will be about the same i think.)

Yup, this has to work.
Sent from my OnePlus 3 using Tapatalk

Okay thanks guys ! I will keep you up to date.

Bryandu13 said:
Okay thanks guys ! I will keep you up to date.
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Did it work? I am in the exact same situation. Curious to know the answer.

Vennali said:
Did it work? I am in the exact same situation. Curious to know the answer.
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It has to work but when I tried to separate the screen Bloc with the metal case it was very very hard, I used too much power and broken the screen... That was crazy.
But I have to work.

Bryandu13 said:
It has to work but when I tried to separate the screen Bloc with the metal case it was very very hard, I used too much power and broken the screen... That was crazy.
But I have to work.
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So, what did you do in the end? buy a new phone? I saw the jerryrigeverything teardown..he did it with such ease.. I was hoping it would be the same for me.

Vennali said:
So, what did you do in the end? buy a new phone? I saw the jerryrigeverything teardown..he did it with such ease.. I was hoping it would be the same for me.
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I watched his video too, for me it was a LOT more resistant.
And finally I bought another phone (still OP3) and I'm still using it.
I tried to open the old phone again and I managed to do it using the jack connector, I used a screwdriver and levered in the jack connector (and the jack connector is still working).