Develop Bugs

Black screen, can't repair because it's rooted

Hey guys I have a relatively new Samsung GS3. I've been using it with a custom rom for a few weeks now -- no issues. Today, using the Facebook app, my screen went black and now it doesn't work. I can turn on my phone -- it vibrates and it shows the menu and back buttons lit up, but that's it. My phone boots, but the screen does not work.
I figured this is a pure hardware failure and I'll need to contact AT&T. However, I have a custom ROM and figure they will refuse to service the phone due to said ROM. Can anybody help me?
I imagine I have to use Odin to flash a stock image, right? But I can't do that without seeing my screen. I hold volume down, home and power and try to put it into download mode -- even hitting the up key after doing it a few times -- but when I plug into my computer. it looks like my phone is on and not in download mode. :/
Please advise, with a much detail as you can.

You can use an mhl adapter to mirror ur phone screen on a monitor or tv....

My phone wont display anything after kernel install :(

Hi there.
I have a problem. I installed a kernel called ElementalX-m8-1.04-GPE.zip.
Now my phone wont display anything other then the HTC logo when turning on the device.
After the logo has disapered. the phone goes dark. I can hear when i touch the display that something happens. (i can hear dial pad sounds).
I can also hold down power and volume down and hear a screen shot sound.
I can restart the phone my holding down power + volume down + volume up.
I wish to enter recovery so i can undo what i just did. Hope someone can help me.
My phone is a brand new HTC one M8... so this sucks.

Yeah, hard situation. I had the same on my Live with Walkman, but I went to a service where they ressurect my phone. Anyway I think you installed a wrong type of kernel that's why you see dark. Can you tell me when you plug usb to your phone and computer is LED on red? When yes, try to charge the battery. I heared that sometimes work

Yeah the light does turn on.
I'll try charging it then.
The computer can see the device btw, if that's any help.
i just tried HTC sync manager. Just to see if i could restore the phone that way. Sync manager can see the phone, but it says somthing about it's not connected properly. So the restore button is grayed out. I can't press it.

Please post to the apropriate forum for your device
http://forum.xda-developers.com/htc-one-m8/help
---------- Post added at 09:12 PM ---------- Previous post was at 09:10 PM ----------
BikerEcho said:
Hi there.
I have a problem. I installed a kernel called ElementalX-m8-1.04-GPE.zip.
Now my phone wont display anything other then the HTC logo when turning on the device.
After the logo has disapered. the phone goes dark. I can hear when i touch the display that something happens. (i can hear dial pad sounds).
I can also hold down power and volume down and hear a screen shot sound.
I can restart the phone my holding down power + volume down + volume up.
I wish to enter recovery so i can undo what i just did. Hope someone can help me.
My phone is a brand new HTC one M8... so this sucks.
Click to expand...
Click to collapse
And here a guide thread for your device http://forum.xda-developers.com/showthread.php?t=2694600

sorry about that. I will create a new thread on the correct forum

[Q] black screen / Screen unresponsive - Sumsung Galaxy Tab S 10.5 (SM-T805)

My tablet Galaxy Tab S 10.5 (SM-T805) screen went black. I can’t see the screen.
Touch also does not seem to work. However it’s on. it is receiving calls and other messages. It is connected to WiFi.
Power button, volume button are working but I can’t power off the device cause I can’t see the screen options.
When I plug in to the charging cable it vibrates but does not show anything on screen.
It didn't drop or hit by anything. i have been using it for 3 months now. it just happened by itself or may be by some update that I don’t know.
Please help how to bring it back to life

GUI crashed. Press Power+Vol up+Home (for approx 20 sec).

pibach said:
GUI crashed. Press Power+Vol up+Home (for approx 20 sec).
Click to expand...
Click to collapse
I tried several times.. nothing happens... any other suggestion please

Power+voldown+home.
If this does not boot, you could try with usb dongle.
Or full run down to empty battery.
Next chance would require to open it.

sarhn007 said:
My tablet Galaxy Tab S 10.5 (SM-T805) screen went black. I can’t see the screen.
Touch also does not seem to work. However it’s on. it is receiving calls and other messages. It is connected to WiFi.
Power button, volume button are working but I can’t power off the device cause I can’t see the screen options.
When I plug in to the charging cable it vibrates but does not show anything on screen.
It didn't drop or hit by anything. i have been using it for 3 months now. it just happened by itself or may be by some update that I don’t know.
Please help how to bring it back to life
Click to expand...
Click to collapse
It's not bricked so calm down. It just had a cyber stroke. It will be fine just let the power run out and recharge the battery so u can turn it on again. Same thing happened within days for getting mine.

yes... I am waiting for the battery to be completely dead. so far its on...taking calls and sms..I don't howmuch % of batter is left cause I can't see it.

I had the exact same problem once....and i had a hunch that the screen was fine, it turned out it was thankfully....but....im aware that on 100 percent battery in standby it can last a good week or so....i was too impatient...so i ran my fingers around the edge of the backing and slowly was able to pull out the back of tge case and unclip the battery...worked straight away when turned on.
But also what i discovered does reset the tablet forcefully is holding power, vol down and the center button at the same time....try it a few times for a minute each time...if successful you might get a message about being in download mode but then just do the same thing again but imidiatly release your fingers once you see the screen go off from download mode or it will just go bavk into it...good luck m8

Have you tried holding down the power button for awhile, like 30 seconds? This should shut your device off....Then take it from there.

Itchiee said:
Have you tried holding down the power button for awhile, like 30 seconds? This should shut your device off....Then take it from there.
Click to expand...
Click to collapse
Doesnt work on t805...dunno why.

pdolton2000 said:
Doesnt work on t805...dunno why.
Click to expand...
Click to collapse
Correct .. i tired many times... it does not work... may be the device is on...
How to run down the battery its still on .. its third day today...

sarhn007 said:
Correct .. i tired many times... it does not work... may be the device is on...
How to run down the battery its still on .. its third day today...
Click to expand...
Click to collapse
Seriously on my tab right now i just held vol down, power and center button whilst on and after 25 seconds screen went black then gave the "are you sure you want to enter download mode." Then i tapped vol up......t805 as well.

Battery completely empty.. tab S turned off, i plugged in the charging cable (1 ) battery meter does not appear (2) Power+vol does not work for me.. if it does.. i can't see because of the dead screen...
i have 2 options now..
(1) send it back in warranty.. this will take a lot of time and they will only fix not replace.. i guess
(2) open it and fix the display.
Thinking,,,,,,,,

sarhn007 said:
Battery completely empty.. tab S turned off, i plugged in the charging cable (1 ) battery meter does not appear (2) Power+vol does not work for me.. if it does.. i can't see because of the dead screen...
i have 2 options now..
(1) send it back in warranty.. this will take a lot of time and they will only fix not replace.. i guess
(2) open it and fix the display.
Thinking,,,,,,,,
Click to expand...
Click to collapse
Well 160 dollars for lcd , digitizer and frame ...
http://m.aliexpress.com/item/2016775924.html?tracelog=storedetail2mobilesitedetail
But if it turned out it was something else causing it nit to display like a board fault im not sure they will help ya only catch m8

Hello,
Did you finally got some result?
I have exactly the same problem with a Samsung Galaxy Tab S 10.5. The screen suddenly went black although the light leds (home, back) were on.
I tried different combinations of buttons, usb charging and nothing. The only difference is that now the light leds are off.
---------- Post added at 08:46 PM ---------- Previous post was at 08:32 PM ----------
I have achieved to boot up the device because I have heard the start up sound and some notifications. However, the display doesn't work at all: the screen is black and there is no response when touching it. In addition, the light leds of the buttons are off now even when I push the home button.
Volume keys are working (I hear the sound then touching them).

Hard reset is VOLUME DOWN(left side on a 10.5) + POWER. Hold until it restarts.

ashyx said:
Hard reset is VOLUME DOWN(left side on a 10.5) + POWER. Hold until it restarts.
Click to expand...
Click to collapse
That doesn't work, as sarhn007 said the problem is that screen is dead:
sarhn007 said:
Battery completely empty.. tab S turned off, i plugged in the charging cable (1 ) battery meter does not appear (2) Power+vol does not work for me.. if it does.. i can't see because of the dead screen...
i have 2 options now..
(1) send it back in warranty.. this will take a lot of time and they will only fix not replace.. i guess
(2) open it and fix the display.
Thinking,,,,,,,,
Click to expand...
Click to collapse
But I can't figure how could this happen in a new (2 month) high-end product... I think that I will have to use the product warranty with the cost in time it involves.

This has happened to me twice during the last year. The last time was just ten minutes ago. I tried everything mentioned in this thread. VolUp+Home+Pwr for a looong time. Just PWR for a long time. I saw on my Wifi Router that the tablet was connected, but no screen. What helped me was to do a combination of everything mentioned here. What eventually got the screen on was 1. I turned of my router and 2. Home+VolDOWN+PWR for (what I believe was) 10-15 seconds. Then I got the choice to do a normal restart or a device reset. If you come this far, be sure to press VOL DN when asked. Otherwise your data will be lost. Obviously, I can't say if the router pwr off was necessary or not.
What's really weird is that my LG G3 went into a boot loop at about the same time (less than five minutes apart). They are not connected other than using the same router. I've had my LG G3 for exactly one year without ever experiencing a boot loop. The LG G3 is rooted, but my SM-T805 is not.

zeknun said:
That doesn't work, as sarhn007 said the problem is that screen is dead:
But I can't figure how could this happen in a new (2 month) high-end product... I think that I will have to use the product warranty with the cost in time it involves.
Click to expand...
Click to collapse
It's easy fix, most of the time due to loose LCD cable. If you can hear anything on the background but blank screen, 99% is loose cable.
Remove the back cover, disconnect and reconnect LCD cable, make sure it's fully inserted, then secure the connector with tapes. Test by plugin to charger, press the HOME button.
If you do correctly, the battery icon should show up on the screen. Then put back the cover, you're done.

pdolton2000 said:
I had the exact same problem once....and i had a hunch that the screen was fine, it turned out it was thankfully....but....im aware that on 100 percent battery in standby it can last a good week or so....i was too impatient...so i ran my fingers around the edge of the backing and slowly was able to pull out the back of tge case and unclip the battery...worked straight away when turned on.
But also what i discovered does reset the tablet forcefully is holding power, vol down and the center button at the same time....try it a few times for a minute each time...if successful you might get a message about being in download mode but then just do the same thing again but imidiatly release your fingers once you see the screen go off from download mode or it will just go bavk into it...good luck m8
Click to expand...
Click to collapse
really thanks dude...nice work..
my phone samsung on nxt today stopped working in same manner...your idea worked...really thanx..i tried all...as i am also a tech guy.....but nothing worked..ur idea worked for me...thankx a lot...

Did I softbrick?

Hi! I have an LG x Power (posting here because the power doesn't seem to have a forum yet) and when it was booting I held the power button and the two volume buttons down by accident... It turned off and it wont turn back on again even after charging. now here's the wierd part: when I plugged it into my computer to check if I could see what happened, it instead of giving me nothing, downloaded some drivers.

sounds like you might be in some sort of download mode. Have you tried just holding the power button in, like a forced reset

hey buddy in case you still didnt figure this out you have put it in bulk mode but you can hold volume down and power for awhile and it will reboot
---------- Post added at 01:26 AM ---------- Previous post was at 01:23 AM ----------
MVGiC said:
Hi! I have an LG x Power (posting here because the power doesn't seem to have a forum yet) and when it was booting I held the power button and the two volume buttons down by accident... It turned off and it wont turn back on again even after charging. now here's the wierd part: when I plugged it into my computer to check if I could see what happened, it instead of giving me nothing, downloaded some drivers.
Click to expand...
Click to collapse
hold power and volume down for a bit and it will reboot had same thing happen, it is odd but what you discovered is something I mentioned a couple weeks ago that for some reason it goes into qualcomm bulk mode when doing that combo of key presses same thing happens on mine, but sadly I cant see the partitions when it is in that mode like normally wish I could cause then we could maybe send a custom rooted system partition to it but sadly that doesnt work, but you can still run scripts from the download mode on it at least, but so far I havent found one that will actually work for rooting it seems the same restrictions apply in marshmallow as when it is actually booted on the com ports hopefully someone can piece together something from the quad root exploit that we are still vulnerable to on this device to eventually get a root shell.

Power Button worn out? Accidentally starting Camera despite clicking it only once.

EDIT: Fixed it (for now). Copied from my post on site 2.
What's up guys, I'm sorry for the late followup. It turned out, that I was too lazy to send it back. Now, almost a year later, I'd gotten into fixing phones and got the courage to open up the device and see what's up with the power button. It felt like the issue has been a bit less noticeable recently but I checked the replacement parts prices and how to open our phone up.
I think I've fixed the issue by adding one layer of electrical tape over the button-contact. I believe the issue is that the pin a just a little bit too short to reliably properly click the button.
Short tutorial:
Turn the device off and remove the simcard bracket.
It's actually super easy and you don't need to screw or remove anything. Google "Xiaomi MI A2 LITE disassembly screen battery smontaggio" you'll find a video, in the beginning the guy shows how to remove the backcover. I've used a hard, plectrom-looking "opening-pick" at the bottom, then carefully but firmly around the sites. You don't even need to remove the flex cable from the back, just make sure you don't rip it off. Cut off a short bit from the electrical tape, tape it from the battery to the contact, so it doesn't fall off. Close the case again, turn it on and check whether the powerbutton still clicks (doesn't stick) and test the screen lock. Post back if this has worked or if you've tried it.
Click to expand...
Click to collapse
Does anybody have a similar issue?
I've ordered the device from gearbest to Europe. Everything worked nicely.
However, recently when I hit the power button it sometimes triggers the double click interaction and opens my camera. I've tested a few ways to press it slightly from the side, with more force or less. However it will 1/3 times vibrate and start the camera like I had double clicked it, it's more likely when I hit it a bit too lightly though. Could it already be worn out after 2 months? This never happened when the device was new as far as I ran remember.
Yes I'm aware that I could change the camera shortcut but this doesn't stop me from worrying about whether my powerbutton will give out soon.
I was using the phone happily in the case Xiaomi has provided. Dropped the phone once and got a little scratch on the VOL Button but other than that, nothing crazy has happened. Does anyone have a clue whether they will still replace it? I'd gotten it in mid-August.

<message deleted>

Buttons are usually the main gate to "planned obsolescence". I bought this device after my nexus 5 power button started working funny (I physically removed it and worked only with gestures). So, now I try not to press the button unless necessary. I unlock with fingerprint, and lock with Greenify.
In other words. Make sure of it, if the button starts working funny, I'd file a warranty claim. Or it won't last long and warranty will expire eventually. It can happen with this device and with any other piece of tech.
My opinion.
If you do place a warranty claim, let us know how xiaomi's customer service works in Europe.

needhelpgeez said:
Does anybody have a similar issue?
I've ordered the device from gearbest to Europe. Everything worked nicely.
However, recently when I hit the power button it sometimes triggers the double click interaction and opens my camera. I've tested a few ways to press it slightly from the side, with more force or less. However it will 1/3 times vibrate and start the camera like I had double clicked it, it's more likely when I hit it a bit too lightly though. Could it already be worn out after 2 months? This never happened when the device was new as far as I ran remember.
Yes I'm aware that I could change the camera shortcut but this doesn't stop me from worrying about whether my powerbutton will give out soon.
I was using the phone happily in the case Xiaomi has provided. Dropped the phone once and got a little scratch on the VOL Button but other than that, nothing crazy has happened. Does anyone have a clue whether they will still replace it? I'd gotten it in mid-August.
Click to expand...
Click to collapse
when you dropped it
the power button may have got stuck
this is possible and I've seen it on some other devices
you can open it yourself if you don't care for warranty like i do
but the safest option is to claim warranty and yes they would replace it

needhelpgeez said:
Does anybody have a similar issue?
I've ordered the device from gearbest to Europe. Everything worked nicely.
However, recently when I hit the power button it sometimes triggers the double click interaction and opens my camera. I've tested a few ways to press it slightly from the side, with more force or less. However it will 1/3 times vibrate and start the camera like I had double clicked it, it's more likely when I hit it a bit too lightly though. Could it already be worn out after 2 months? This never happened when the device was new as far as I ran remember.
Click to expand...
Click to collapse
I have the exact same issue. It started when I installed the Oreo update, but it could be a coincidence. I'm still looking for a fix.

It also happens to me, and I didn't drop the phone... Is there a way to change the shortcut to, maybe, press the power button 3 times instead of 2?
Enviado desde mi Mi A2 Lite mediante Tapatalk

ovejota said:
It also happens to me, and I didn't drop the phone... Is there a way to change the shortcut to, maybe, press the power button 3 times instead of 2?
Enviado desde mi Mi A2 Lite mediante Tapatalk
Click to expand...
Click to collapse
It happens to me too, I disabled the shortcut and just not using it right now. I don't think there is a way to change the shortcut

It happens to me....
It happened for me as well.
And i think it's a software bug, not hardware..

avi_soft said:
It happened for me as well.
And i think it's a software bug, not hardware..
Click to expand...
Click to collapse
Same here, never crashed on the floor, it's software issue

sinthemau said:
Same here, never crashed on the floor, it's software issue
Click to expand...
Click to collapse
It obviously is not a software issue. This means that they've used cheap contact points on the button if this happens to many of us. This is a hardware issue.

marstonpear said:
It obviously is not a software issue. This means that they've used cheap contact points on the button if this happens to many of us. This is a hardware issue.
Click to expand...
Click to collapse
I'm having this issue since day one. It is obviously software, otherwise the same contact problem would occur when turning the screen ON, but it never happens. Solution is to disable the feature under System -> Gestures -> Jump to camera.

i also dissabled the camera gesture because of this issue.
im sure this is reasoned by a more or less loose power button and not an software issue

fugu5 said:
I'm having this issue since day one. It is obviously software, otherwise the same contact problem would occur when turning the screen ON, but it never happens. Solution is to disable the feature under System -> Gestures -> Jump to camera.
Click to expand...
Click to collapse
How can that be a software issue? Same issue happens to me whenever I use the power button, either to lock the screen or unlock the screen. Also if it was a software issue, it could be fixed via installing a GSI. That doesn't fix it either.

marstonpear said:
How can that be a software issue? Same issue happens to me whenever I use the power button, either to lock the screen or unlock the screen. Also if it was a software issue, it could be fixed via installing a GSI. That doesn't fix it either.
Click to expand...
Click to collapse
Let me break it down and you can tell me if I'm missing something.
1. Many users are reporting that the camera app starts when pushing the power button to turn the screen off.
2. They are not reporting any other issue with the power button, like the camera app starting when they try to turn the screen on, the button being irresponsive, or the camera app NOT starting when they deliberately push the button twice.
3. The problem reportedly goes away if the double-push gesture is turned off in settings.
Do you still think this is a hardware issue?

fugu5 said:
Let me break it down and you can tell me if I'm missing something.
1. Many users are reporting that the camera app starts when pushing the power button to turn the screen off.
2. They are not reporting any other issue with the power button, like the camera app starting when they try to turn the screen on, the button being irresponsive, or the camera app NOT starting when they deliberately push the button twice.
3. The problem reportedly goes away if the double-push gesture is turned off in settings.
Do you still think this is a hardware issue?
Click to expand...
Click to collapse
When I disable double press gesture from Gestures, still when I sometimes hit the power button, the phone locks and closes the screen and then turns the screen on again which means that it still registers one presses sometimes as double presses. Also if you've ever used a keyboard or a mouse or anything electrical with buttons on it, these appliances do the same sometimes even though you tap one button they sometimes register it twice. Which is a hardware issue. I still can't see any software issue here. When you disable the double press gesture, it doesn't launch the camera anymore but it turns on the screen after locking it (sometimes as usual)

marstonpear said:
When I disable double press gesture from Gestures, still when I sometimes hit the power button, the phone locks and closes the screen and then turns the screen on again which means that it still registers one presses sometimes as double presses. Also if you've ever used a keyboard or a mouse or anything electrical with buttons on it, these appliances do the same sometimes even though you tap one button they sometimes register it twice. Which is a hardware issue. I still can't see any software issue here. When you disable the double press gesture, it doesn't launch the camera anymore but it turns on the screen after locking it (sometimes as usual)
Click to expand...
Click to collapse
Not for me, so it's possible that these are actually two different problems with this phone. I wouldn't be surprised. :laugh:

fugu5 said:
Not for me, so it's possible that these are actually two different problems with this phone. I wouldn't be surprised. :laugh:
Click to expand...
Click to collapse
Yeah me neither. They don't look like they're going to fix anything or listen to users either. I'm happy with stock Android though.

Hi guys, for me, the problem has fixed disabling the option "Power button lock the phone", and set the option "Lock automatically": immediately.

The fix
What's up guys, I'm sorry for the late followup. It turned out, that I was too lazy to send it back. Now, almost a year later, I'd gotten into fixing phones and got the courage to open up the device and see what's up with the power button, without disabling the functionality. It felt like the issue has been a bit less noticeable recently but I checked the replacement parts prices and how to open our phone up.
I think I've fixed the issue by adding one layer of electrical tape over the button-contact. I believe the issue is that the pin a just a little bit too short to reliably properly click the button.
Short tutorial:
Turn the device off and remove the simcard bracket.
It's actually super easy and you don't need to screw or remove anything. Google "Xiaomi MI A2 LITE disassembly screen battery smontaggio" you'll find a video, in the beginning the guy shows how to remove the backcover. I've used a hard, plectrom-looking "opening-pick" at the bottom, then carefully but firmly around the sites. You don't even need to remove the flex cable from the back, just make sure you don't rip it off. Cut off a short bit from the electrical tape, tape it from the battery to the contact, so it doesn't fall off. Close the case again, turn it on and check whether the powerbutton still clicks (doesn't stick) and test the screen lock. Post back if this has worked or if you've tried it.

I changed the power/volume button assembly outright just the other day, and so far I'm not getting this issue anymore.
I recorded myself doing it here, so you can see how easy (or hard) it is: https://youtu.be/q8kaY-v0q_Q