Black screen after screen replacement - Samsung Galaxy S7 Questions and Answers

Hello, about 4 months ago I bought a used S7 in very good condition. After about a month of use, a fairly common problem occurred - the screen only worked at a sufficiently high temperature. So I decided to replace the display. After the replacement, everything worked correctly, there were no problems with the phone. A month passed and one day the display stopped working completely. The notification LED is working properly, the phone turns on and off (vibrations also work). I'm not sure if the display responds to touch, from my observations it seems that it doesn't. I tried all the reset button combinations. What can I do in this situation?

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[Q] My display seems to fail randomly, even after changing LCD. What could it be?

So here's my issue. Yesterday, my phone started to give me a while screen full of dead pixels (pinkish color) randomly. I would turn off the phone, turn it back on and after 2-3 minutes it would crash again. Last year I dropped it and cracked the screen, so to me it was related to that. The phone works fine other than that (music plays when display fails. I did wipe it completely and reinstalled Kit Kat, it solved the issue temporarily but after 30 minutes it started again.
Today I decided to go check out a phone repair shop and ended getting my phone fixed by them. What this consisted of is a replacing the display and plastic frame. I picked up the phone and everything was perfect, new screen and display which looks and feels like new.
Now it's been about 5 hours and the phone started acting strange again. Now it's a lot less worse than before, but I still get the full screen of dead pixels. The display will go on and off (I guess it's trying to reinitialize or something) but always fails. So I end up rebooting the phone for it to work again.
The 2 times it happened after getting the phone fixed it was when I put it in my pocket to go from my work to my car, and then from my car to my home. So I don't know if it has anything to do with being in my pocket, that's why I came here.
So could anyone could shed some light on my issue here? Is my phone already dying? It's only been 13 months and I'd hate to have spent for a new display for basically nothing.
Replace the flex cable. If that doesn't work then it's an issue with the motherboard/screen, in which case you would have to guess between the two, or simply send it to LG and pay for a repair.

[Completed] Nexus 5 screen problem

Hi,
I have this really weird stuff going on with my Nexus 5 screen. I cracked it a couple months ago and bought a legit replacement screen for it and installed it myself (glass, lcd and frame). I fixed it with good instructions and it worked properly for two months. However though, now when I take it out of a pocket and try to turn screen on, sometimes it just doesn't light up. It's still on and every button works but the screen doesn't turn on. I have to give it a light tap or two on the back in order to make it light up again. Same thing happens sometimes when I'm using the phone normally, the screen just goes black and goes on after tapping it couple of times. Otherwise the phone works normally like it did when I bought it two years ago and after running couple of tests with screen, everything seems to work from touch interface to the graphics card.
Tried looking it up, no results.
I've noticed that the front camera doesn't work for some reason (probably just broken) and the battery lasts in use only 2-4 hours which isn't that much of an issue since I'm looking for a new phone. I just want this one to last long enough till I buy a new one.
devderp said:
Hi,
I have this really weird stuff going on with my Nexus 5 screen. I cracked it a couple months ago and bought a legit replacement screen for it and installed it myself (glass, lcd and frame). I fixed it with good instructions and it worked properly for two months. However though, now when I take it out of a pocket and try to turn screen on, sometimes it just doesn't light up. It's still on and every button works but the screen doesn't turn on. I have to give it a light tap or two on the back in order to make it light up again. Same thing happens sometimes when I'm using the phone normally, the screen just goes black and goes on after tapping it couple of times. Otherwise the phone works normally like it did when I bought it two years ago and after running couple of tests with screen, everything seems to work from touch interface to the graphics card.
Tried looking it up, no results.
I've noticed that the front camera doesn't work for some reason (probably just broken) and the battery lasts in use only 2-4 hours which isn't that much of an issue since I'm looking for a new phone. I just want this one to last long enough till I buy a new one.
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Greetings,
Thank you for using XDA Assist. The best place to ask your questions would be here:
[HELP THREAD] Nexus 5 | Ask any question
Good luck!

Replacement touch screen not working

Hi,
I've bought a new screen + digitizer and replaced it with my broken screen. At first it didn't work...but after updating my N5 device with a OTA cable and a mouse i worked for about a day. But this morning it was unresponsive again.
I've opened it up and checked that every ribbon cable is correctly installed.
The screen turns on fine, but the touch screen is unresponsive.
Any one who has a fix for this or know what to do?
Sounds like a hardware problem to me.
Your previous screen is completely dead ? If the previous screen worked try to put it back and see if it's ok. Maybe you damaged the flex cable or something. The nexus's connectors are really bad...
I've a very similar situation here. Where did you get the screen? Mine seems to work fro a couple minutes then it's unresponsive.
I think the screen is defective. I have replaced the screens on 6 or 7 nexus 5 phones with 3rd party frame/LCD/glass units from Aliexpress and they all continue to work after several months of use.
i have this question also. i can use my touch screen at the first time but not after reboot . Display works very fine to my new screen with digitizer.

Damaged screen

Hello,
two years ago I accidentally took my S5 for a swim, after the accident phone was resting for 18 months in a drawer. Unfortunately I cracked my next phone so S5 is now my daily driver. Everything is working fine except screen colors, everything has a yellow/grey tint and display is a lot dimmer, especially on black colors. One time when phone got really hot screen started to work just fine, all colors regent to normal but it lasted only for a few minutes, so I assumed it was heat related.
4 days ago without any reason my screen somehow healed itself and screen started to work properly again, I couldn't believe how it was possible. Unfortunately after 4 days with perfect colors, blacks was truly black and brightness was fully working screen return to the damaged state.
Does anyone know how it was possible, what actually happened and is there any way to fix it again?

Backlight turns on, unable to display anything

I bought an Xperia XZs from a website called DWI Digital Cameras about a year ago (they've closed down recently due to the new GST regulations). I've had this issue since the day I received it and I thought it wasn't that big of a deal at the time, but it's gotten to a really bad point now.
The issue is that very often when I try to wake up the phone (like almost half the time) the screen does not display anything while the backlight turns on. The backlight might also flash multiple times as if it's trying to get the rest of the screen to wake up. This issue would usually go away for a bit if I either tried to open a camera app from the lockscreen (via double-pressing the power button) or rebooted the phone - the backlight would turn on and off a few times and the rest of the screen would temporarily work again. But now, it seems to be not working no matter what I try.
I'm pretty sure that there's nothing wrong with the screen itself, I even got it replaced once after I accidentally dropped and shattered it and the issue still did not go away. The issue also persists no matter what ROM I have installed as well.
Any experts on this? Cheers.

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