Database Users

Random screen blank problem

My HD suddenly developed a problem where the screen will sometime not turn on when come out of standby, or after soft-reset. When this happens, I noticed that the phone is still working because you can feel the feedback from the virtual buttons. The screen is just blank.
I tried hard-resetting it but during the process when the phone goes to reset, the screen goes blank again but the phone continues to function.
I think it is a hardware problem as when I soft-reset it, the "smart mobility..." screen does not even comes on. The phone just continues to boot up.
This only happens randomly and I cannot reproduce it everytime. I am concern that if I sent it for service, they might not be able to reproduce the problem and send it straight back.
I am from Sydney Australia so the only authorised repairer is Fonebiz.
Anyone has experience dealing with them?
Do they have tools to diagnose the problem even if they cannot reproduce the problem? I suspect the motherboard is faulty.
I really like my HD and this is just painful! Any comments or advise will be much appreciated.

I have the exact same problem which I mentioned: here though after some time I had the additional issue that the screen would come on but with an upside down mirror image, and sometimes when that happened it would also look very low res or pixelated or whatever.
I just mailed it off to a repair center in the Czech Republic. Hopefully they will be able to reproduce the problem. It was getting to the point where it would rarely turn on correctly.

ekitel said:
I have the exact same problem which I mentioned: here though after some time I had the additional issue that the screen would come on but with an upside down mirror image, and sometimes when that happened it would also look very low res or pixelated or whatever.
I just mailed it off to a repair center in the Czech Republic. Hopefully they will be able to reproduce the problem. It was getting to the point where it would rarely turn on correctly.
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Actually I also have the problems with upsidedown screen and the low res/faded effect.
Please keep us posted with the service.

I have the same problem and it's getting worse and worse. Today it happend around 20 times. And at the moment it doesn't even happen anything although I had it some seconds ago in my hands. I turned screen off, put it on the desk and now nothing, even no vibration, just dead...

-db- said:
I have the same problem and it's getting worse and worse. Today it happend around 20 times. And at the moment it doesn't even happen anything although I had it some seconds ago in my hands. I turned screen off, put it on the desk and now nothing, even no vibration, just dead...
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Same happened to me, had to send it off for repair. Problem with the main crcuit board. All fixed now.

garybeaman said:
Same happened to me, had to send it off for repair. Problem with the main crcuit board. All fixed now.
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So they are able to fix it? Gives me hope again

If the problem happens often and can be easily reproduced, it should be easy to fix. Problem with mine is that it only happens once or twice a day. I might have to wait a bit before sending it for service. Luckily I still have 10 months on my warranty.

forumx said:
If the problem happens often and can be easily reproduced, it should be easy to fix. Problem with mine is that it only happens once or twice a day. I might have to wait a bit before sending it for service. Luckily I still have 10 months on my warranty.
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Ok then I send it in, because now it happens all the time. Just have to leave it some minutes and then it's black again :-(

ive been having the same problem, try this:
go to setings - system - power - advanced
untick "turn off device if not used for"
seems to have worked for me

scar88 said:
ive been having the same problem, try this:
go to setings - system - power - advanced
untick "turn off device if not used for"
seems to have worked for me
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Click to collapse
Yeah sure that works but then the phone is always on so your battery gets drained real fast, not?

Mytouch 4G brightness not working help please!!!

ok 1st of all thanks for your time... I have a rooted Mytocuh 4G running on stock rom from tmobile (2.2.1)... problem is that brightness is not working at all, i try to change it in settings, but it does not work, I've also tried factory reset, changing roms, wiping data, cache, dalvik, battery stats, almost everything but still no clue of whats wrong, lcd is working great, touch responds good, only problem is brigthness, if theres a fix out there i'd be glad to hear it from u... thnx :good:

Your backlight could be going out. Does it come on at all?

estallings15 said:
Your backlight could be going out. Does it come on at all?
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thnx for ur answer... mmm nope, it stays only at the lowest level...

oh God.... now the touchscreen is not working.... i dont know what happened, i cant even unlock my phone!! Help!! please.....

It sounds like hardware. If it were me I'd flash the froyo PD15IMG and see if anything magically starts working. If not, then I'd have my answer.

estallings15 said:
It sounds like hardware. If it were me I'd flash the froyo PD15IMG and see if anything magically starts working. If not, then I'd have my answer.
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Ok, so i just flashed back to froyo PD15IMG and the touchscreen works now, but the brightness is still not working, ive also noticed that every time i press the screen, it kinda fades a little... very weird... as u said before i think it may be a hardware problem..... any ideas of which part????

I believe that backlight is part of the display.

estallings15 said:
I believe that backlight is part of the display.
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ok, so today i found more problems, rotate sensors are not working, compass is dead, and also the phone does not recognize any headset i plug in, i cant even listen to my music.... i remember that a week ago, i plugged my phone to a wall outlt with an iphone usb charger, do u think that has something to do with it???
thanks

Doubtful. Was it an Apple charger or a Brand X (off-brand)?
I seriously doubt that would cause a systematic failure of your hardware. If anything it would fry the usb/charging port, were there something seriously wrong with the charger.
Sounds like you've got a paperweight on your hands.

estallings15 said:
Doubtful. Was it an Apple charger or a Brand X (off-brand)?
I seriously doubt that would cause a systematic failure of your hardware. If anything it would fry the usb/charging port, were there something seriously wrong with the charger.
Sounds like you've got a paperweight on your hands.
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it was an original iphone 3g adapter... well i think it might be a hardware problem so im gonna keep trying to fix it, ill let you know anything.. thanks 4 your help... :good:

wow this is so bad, now battery wont charge.... this is so frustrating... guess im gonna have to change to another phone....

Uuuuh, yeah. That baby is dying a slow painful death.

HTC mytouch 4g
estallings15 said:
Uuuuh, yeah. That baby is dying a slow painful death.
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I have same problem with my phone.
The phone first had a problem when I left it in the sun for abt half an hour.
The brightness setting has no effect.
Auto rotate screen does not work, however touch screen works fine.
The phone hangs up now and then.
only the backlight does not work and i can easily use the phone inside a room
the compass does not work
tried factory resetting the phone no success
The charge light does not come on even when the phone is charging. however when i turn my phone off and charge it, the charge light comes on.
usually during startup or booting the device, the brightness is supposed to be full. however no brightness during boot up

jonty.nik said:
I have same problem with my phone.
The phone first had a problem when I left it in the sun for abt half an hour.
The brightness setting has no effect.
Auto rotate screen does not work, however touch screen works fine.
The phone hangs up now and then.
only the backlight does not work and i can easily use the phone inside a room
the compass does not work
tried factory resetting the phone no success
The charge light does not come on even when the phone is charging. however when i turn my phone off and charge it, the charge light comes on.
usually during startup or booting the device, the brightness is supposed to be full. however no brightness during boot up
Click to expand...
Click to collapse
Only fix i found so far for this problem was replacing the power flex plus the main flex of the phone.. that solved my problem...
http://www.ebay.com/itm/FLEX-CABLE-...156?pt=LH_DefaultDomain_0&hash=item3f1a55d43c
good luck

it's done for...!
sorry bro but its good bye for your phone...!

I am having a similar issue with a friends phone. He had a cracked screen so i replaced that. 2 weeks later he brought it back to me and the brightness is stuck on the lowest level. Changing the level in options has no effect. I was just wondering is the backlight and the LCD screen one and the same? Should i bother changing the LCD or is there something else I should try repairing first. Everything else on the phone seems to function properly...its just a pain to see it!

[Q] LCD not working, screen and digitizer fine, what could be the problem?

Hello all!
I would like your opinions/knowledge on how likely you think it is that my problem is a simple disconnected cable, and if it would be worth it to take apart my phone (I've never done it before.. but I'm careful) to see if I can just reconnect it.
I woke up one morning and my screen would not turn on =( I did not drop it or get water on it, although it had been very humid. The screen is not cracked and it is still responsive to touch (vibrates when touched on the soft keys on the bottom) but it is completely black, no flickers, no faint images, no nothing. I also have not seen the LED light up since this has happened, when charging or plugged into my computer or anything. My computer DOES recognize the phone, and I have used the Motorola utility to update my phone since this has happened, but that did not fix it. I have tried all of the key combinations and I have successfully rebooted it (I can hear the droid start up noise, the camera sound when I hold power and down volume at the same time, and it sounded like I almost accidentally made a call when messing with it last night).
I have not yet been able to factory restore it or anything like that from recovery, as I am flying blind, but I'm thinking this is a hardware problem with the LCD?
The phone is not rooted and boot loader is not unlocked. It's only a few months old but I bought it used online so there's no returning it or anything like that.
I just don't know enough about any of this to know how to proceed next. Any help would be appreciated! Thank you for your time!

SunLilac said:
Hello all!
I would like your opinions/knowledge on how likely you think it is that my problem is a simple disconnected cable, and if it would be worth it to take apart my phone (I've never done it before.. but I'm careful) to see if I can just reconnect it.
I woke up one morning and my screen would not turn on =( I did not drop it or get water on it, although it had been very humid. The screen is not cracked and it is still responsive to touch (vibrates when touched on the soft keys on the bottom) but it is completely black, no flickers, no faint images, no nothing. I also have not seen the LED light up since this has happened, when charging or plugged into my computer or anything. My computer DOES recognize the phone, and I have used the Motorola utility to update my phone since this has happened, but that did not fix it. I have tried all of the key combinations and I have successfully rebooted it (I can hear the droid start up noise, the camera sound when I hold power and down volume at the same time, and it sounded like I almost accidentally made a call when messing with it last night).
I have not yet been able to factory restore it or anything like that from recovery, as I am flying blind, but I'm thinking this is a hardware problem with the LCD?
The phone is not rooted and boot loader is not unlocked. It's only a few months old but I bought it used online so there's no returning it or anything like that.
I just don't know enough about any of this to know how to proceed next. Any help would be appreciated! Thank you for your time!
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it would still be under warranty by motorola - especially if you accepted the OTA recently (May 2013).
otherwise, I would try leaving it plugged in for awhile (30-60 minutes), then try rebooting it (hold down all 3 buttons)

Thank you for replying!
jco23 said:
otherwise, I would try leaving it plugged in for awhile (30-60 minutes), then try rebooting it (hold down all 3 buttons)
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I have tried this.. I can hear it booting up but still no screen =(
it would still be under warranty by motorola - especially if you accepted the OTA recently (May 2013).
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Click to collapse
How do I go about collecting the warranty on a phone that I bought used? And what would happen if it showed water damage? I swear I have not gotten any water/liquids on it, but this did happen after it was very humid out for a while, and I have read that high humidity is enough to spread the red dye (regardless of whether or not high humidity actually caused the problem)

SunLilac said:
Thank you for replying!
I have tried this.. I can hear it booting up but still no screen =(
How do I go about collecting the warranty on a phone that I bought used? And what would happen if it showed water damage? I swear I have not gotten any water/liquids on it, but this did happen after it was very humid out for a while, and I have read that high humidity is enough to spread the red dye (regardless of whether or not high humidity actually caused the problem)
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call motorola (or go to their website and bring up a chat session in their online support section)

Try tapping it somehat hard with your finger all around the phone to see if it flashes the screen.

scottocs said:
Try tapping it somehat hard with your finger all around the phone to see if it flashes the screen.
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Click to collapse
No luck =( I've already tried "pinching" the phone somewhat hard all over too... Thank you for the input though!

S5 GM900V Screen Flickering

I've read a lot about the screen flickering issue, suggestions range from changing options in developer options, removing your SD, squeezing certain parts of the phone, slapping it, replacing the screen etc. I was rooted on lollipop using this method: http://forum.xda-developers.com/verizon-galaxy-s5/general/root-method-og5-ok3-t3290370 and after the root the screen returned to normal for about 20 minutes. Over about a month or so after this the problem got worse, I'd have to press the power button 20 or more times to get the screen to come one and as of 3 days ago I haven't been able to use the phone at all. Today I was messing with it and found that if I reboot the phone holding the power and volume down buttons, the screen flickers and I see the yellow triangle with an exclamation point briefly, and flickers out again until the samsung boot screen, every time I do this, the phone stays on. I have USB stayawake on and if plugged in the phone will stay awake for hours until I push the power button to turn off screen, and then repeat the reboot process. Just in case there was a software issue I upgraded to the latest update by using odin, I'm now on 6.0.1 and the phone was working perfectly for an hour before it returned again. If the issue is the flex/ribbon cable that connects the screen or other hardware issue, I don't see how rebooting would help, but if its a software issue, I don't understand why its only after I turn off the screen. Regardless, even when the phone was working it would still flicker on the lowest brightness, but at least the power button would work. Anyone have any ideas?

I've been in this type of your situation believe me all those solutions you mentioned above non of them really work, infact i nearly got my phone twisted because of one stupid yellow flickers. As of now the only perfectly working solution according to my extensive research is first of all never put it in auto brightness, you can reduce the brightness to a minimum, this happens on many samsung devices like s4,note 3 and even some s6 due to the amoled screens you'll notice when you reduce your brightness to the lowest it start immediately. I only got one report on this same issue damaging a s5 but it rear so dont be scared of loosing your phone. I'll upload a sreenshot of my minimum brightness to give an ldea.

nura380 said:
I've been in this type of your situation believe me all those solutions you mentioned above non of them really work, infact i nearly got my phone twisted because of one stupid yellow flickers. As of now the only perfectly working solution according to my extensive research is first of all never put it in auto brightness, you can reduce the brightness to a minimum, this happens on many samsung devices like s4,note 3 and even some s6 due to the amoled screens you'll notice when you reduce your brightness to the lowest it start immediately. I only got one report on this same issue damaging a s5 but it rear so dont be scared of loosing your phone. I'll upload a sreenshot of my minimum brightness to give an ldea.
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Click to collapse
The not using auto brightness does stop the screen from flickering so if I have to turn it down, I turn it down to just below where it starts happening but I still have the issue of the screen not coming on with the power button consistently, it flashes on for a second then back off, not nearly long enough for me to unlock the phone, except for when I restart it using power+vol down
EDIT: I see now this probably should've gone in the help and troubleshooting sub-forum, if any mod sees this, please move it for me.

It worked perfectly for me except your is getting worse by the week. Never mind i just got a new way may be it'll work on your phone, move your brightness tray to the highest or at the middle, keep using it as normal for every day use for at least a week. It worked for my indian friend as he told me. Keep in touch.

nura380 said:
It worked perfectly for me except your is getting worse by the week. Never mind i just got a new way may be it'll work on your phone, move your brightness tray to the highest or at the middle, keep using it as normal for every day use for at least a week. It worked for my indian friend as he told me. Keep in touch.
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The first day it didn't seem to make a difference but I didn't check on it a lot, after that I've checked a few times and it does seem to make a difference it comes on much more frequently now, almost every time, but what could be the cause of the issue then? When I thought it was the ribbon cable connecting the screen I wasn't opposed to replacing it if I have to, but now I'm not sure how to go about fixing this or if I even can other than just leaving brightness up

Just to update, keeping it on max brightness did a lot to solve the issues, but it was still under warranty through Samsung so I sent it in, its on its way back, but according to the report they replaced the LCD

TMobile S8 works fine, except the screen won't turn on

My brothers TMobile S8 screen randomly stopped working. It has no signs of damage anywhere as well. Weirdly, I managed to get the screen to go on one time by pressing some button combos to try to follow a guide to get it into recovery to factory reset it. Upon the phone booting, the battery had 3% and when I went to show him, it was dead. Now after letting it charge, the screen does not work once again and I can't seem to get it to come on in the same way it did before, the bright blue recovery screen.
Is there any software I can use to just attach the phone to it and factory reset it? I mean, I've seen bad phone screens before that have still had images show up on them, even if heavily damaged physically or it no longer responding to touch and showing dim lights. But this one simply doesn't turn on, except the one random time it did, and it was perfectly fine, showed no sign of damage. Any thoughts would be greatly helpful

Is the battery known to be good?
If not replace it. The system will not boot if there's not enough current. It takes a fair amount of power to boot up. A charger can't provide enough to do so...

It boots up fine, I can hear the initial TMobile boot audio as well as the notification sound the phone makes when it gets to the lock screen. I also had it stop charging @80% not too long after buying the phone on release, with some custom ROM I installed. Ofc its a possibility its battery related, since I can't see anything on it, but it was taken care than the average person I am sure

With a custom rom all bets are off. Makes troubleshooting much harder. Possible rootkit.
Firmware and malware aside if it's booting but no display, possible loose ribbon connector, failed display or mobo. That's assuming the battery is good...

Well I did disable/uninstall Superuser from the phone, and I used it for a couple years before giving it to my brother to use. That is a good point about the cable, I will search for images, maybe I can squeeze a few spots to just see what happens

moccor said:
Well I did disable/uninstall Superuser from the phone, and I used it for a couple years before giving it to my brother to use. That is a good point about the cable, I will search for images, maybe I can squeeze a few spots to just see what happens
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Sometimes just reseting a connector is all it takes. Those are low voltage lines and a perfect contact is needed.
If the battery is more then 2-3 yo it's probably at the end of its usable service life.

Thanks for the input, I will open it up if nothing else works and I will report back if it helps