Develop Bugs

[Q] Screen not starting up for power button

Hi,
I started to get a weird problem since last week. I've had this phone for about 3 months now and never had any problem like this.
It all started one morning when I wanted to stop phone alarm. The alarm was going off but the screen was black. I pressed the power button to wake up, but it was still black. After couple of times pressing the power button the screen came up. First it was not that often but the situation started to get worse. It came to that I can sometimes cannot turn it on for a long period of time. I need to keep pressing power button, volume buttons and eventually it will come up.
This is what I've found so far:
1) When the power button is pressed, although the screen doesn't start up, I can see the three buttons at the bottom lighting up. So it is not a problem of the power button.
2) When the power button is pressed, although the screen doesn't power up, the screen seems responsive. I can feel the vibrations when I tap (I have a startup password)
3) When the phone is connected to a power supply, screen always starts up without a problem.
4) Screen will start up more frequently when the batter power is high.
It seems as though there is a connection between batters power and the screen not starting up. But then again, once the screen comes up (after not starting up), then it works fine, until I turn the screen off.
Has anybody experienced anything like this before?
I did a factory reset thinking it might be some application I installed but it didnt help.
I had to send this phone once to repair the speaker and cost more than $80 just for courier. I don't want to spend another to get this fixed.
Thanks.

I have this problem or a problem very close to this. I have a HTC One X (international version). I'm running the latest version and updates and the problem has existed for at least the last two updates.
Android Version 4.1.1
HTC Sense version 4+
Software number 3.18.401.1
I have the screen lock pattern turned on.
Sometimes when I hit the power button, the phone does not turn on and so I press it again and only after a third press does the phone turn on. I then unlock the phone and use as normal. So, several times per day I have to press the power button three times before the phone turns on. But other times I press the power button once and it turns on straight away. I've just turned the pattern unlock off to see if this makes any difference. I'll start to record the exact details of when I experience this and see if we can work out a common cause.
Hopefully if enough people report this problem then they can send out an update to fix this problem.

exazonk said:
I have this problem or a problem very close to this. I have a HTC One X (international version). I'm running the latest version and updates and the problem has existed for at least the last two updates.
Android Version 4.1.1
HTC Sense version 4+
Software number 3.18.401.1
I have the screen lock pattern turned on.
Sometimes when I hit the power button, the phone does not turn on and so I press it again and only after a third press does the phone turn on. I then unlock the phone and use as normal. So, several times per day I have to press the power button three times before the phone turns on. But other times I press the power button once and it turns on straight away. I've just turned the pattern unlock off to see if this makes any difference. I'll start to record the exact details of when I experience this and see if we can work out a common cause.
Hopefully if enough people report this problem then they can send out an update to fix this problem.
Click to expand...
Click to collapse
I'm pretty sure this is a hardware issue. I bought mine from Expansys and sent it back to them for repair. It's been more than a month and they say they're still reparing it.
In my case it was impossible for me to start the screen up with power button no matter how much I pressed it. The only thing that worked for me was to press the back of the phone just below the camera. So it seems like a hardware issue. But on the other hand, at times when I can't get the screen turned on no matter what I do, I'd turn the phone off and start again and the thing would start up like nothing happened. So while I'm pretty sure it is a HW issue, I'm not sure how a power restart makes it work.

For me I don't think that this is a hardware problem as it only started happening once I did the big upgrade from 4.0 to 4.1 and then it follows a specific pattern. That is three power button presses will always turn it on. Less frequently I also get a problem where the power button turns on the three lights on the soft buttons but the screen remains black. I then hit the power button to turn it off, and again to turn it on and the phone is back to normal again.
Is yours an international version? I bought mine an international version and had it shipped to Australia.

solved?
Hi - did anyone ever solve this? This is happening to me with my HTC desire X after having had the screen repaired, so I think it is hardware related, but the shop doesn't know how to fix it! My screen also does not turn back on when I want to end a phone call and pull the phone away from my face anymore. These problems seem related as they started at the same time. I would be grateful for help!

How I "fixed" a "brick" on Xperia SL

Hello,
I'm a new user and this is my first post here. I felt the need to "contribute" with my somewhat of a unique case.
I bought the Xperia SL 48h ago, and managed to "brick" it. The phone just died on me during regular use, I was in astro manager at the moment of the brick, the screen gradually turned off, and the phone became unresponsive soon afterwards. It didn't react when I plugged in the charger or when I connected it to my pc, the LED was dead, power + vol up button combo was also useless, and the pc saw my device as "QHSUSB_DLOAD".
I managed to solve this issue by holding power + vol up button combination for four (4!) minutes. I didn't really have a stopwatch, but I was in the bus on road to the store to return the phone, and just thought I might give persistence and stubbornness a chance. Three bus stops later, the phone vibrates and just turns on normally, like nothing happened.
I don't know how bugs like this occur, nor do I know how to prevent them; I am going to pretend this was just a work of gremlins.
Bottom line - if power on + vol up button combo didn't work for you for a 5 second, 10 second or a 30 second time-span, hold them buttons for a couple of minutes and pray that it works. I hope this helps someone.
Best regards

Did it have enough charge?
Sent from my LT26i using xda app-developers app

Seems your phone got stuck and turned the screen off.
Holding power+volume Up forces it to shutdown without messing with the battery-removal.
So you might have been able to restart it successfully.

bluechelsea said:
Did it have enough charge?
Click to expand...
Click to collapse
The battery was at 14% at the time of power+vol up wake up. I didn't charge it though, I plugged in the charger just to see if there was a LED on, but there wasn't any LED response whatsoever.
razormc said:
Seems your phone got stuck and turned the screen off. Holding power+volume Up forces it to shutdown without messing with the battery-removal.
So you might have been able to restart it successfully.
Click to expand...
Click to collapse
That must be it. At the moment of the brick, screen gradually turned off, with darker colors becoming instantly black, and brigther colors getting a yellow tint just before everything vanished from the screen. Thing is though, the phone didn't react to the power+vol up combo right away, but two hours later and almost four minutes of holding the buttons.
One more thing that I noticed was, when the phone was connected to my pc, if I held the power+vol up, the pc would add/remove my hardware in a cycle, or at least play the sound of a device connected/disconnected. The phone still remained dead, but returned later for a miraculous wake up.

sl0e said:
...
One more thing that I noticed was, when the phone was connected to my pc, if I held the power+vol up, the pc would add/remove my hardware in a cycle, or at least play the sound of a device connected/disconnected. The phone still remained dead, but returned later for a miraculous wake up.
Click to expand...
Click to collapse
I'm not an expert, but this is probably your phone entering fastboot mode and then being disconnected due to incorrect drivers on the PC.
Glad your phone came back though. Comatose phones are terrifying, no?

razormc said:
I'm not an expert, but this is probably your phone entering fastboot mode and then being disconnected due to incorrect drivers on the PC.
Glad your phone came back though. Comatose phones are terrifying, no?
Click to expand...
Click to collapse
I'm not out of the woods yet.
Got myself a second brick, and I've been trying to work it out for the past 24+ hours. I won't post about it on this thread, I've posted here: http://forum.xda-developers.com/showpost.php?p=39847797&postcount=532 , but I will report back with any advancements on the matter.

[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...

Lockscreen unsreponsive to touches

In general I've been happy with 5.0 but every now and then the lockscreen doesn't respond to touches. the power button turns the screen on but when i swipe to unlock my tablet, nothing happens. Now matter how I swipe, nothing happens. The screen eventually just times out and goes off. This also means that I can't turn it off to reboot it. Sometimes plugging it in to the charger fixes this, but I usually just have to wait a while for it to start working again.
Anyone else have this happening to them??

nvillamob said:
In general I've been happy with 5.0 but every now and then the lockscreen doesn't respond to touches. the power button turns the screen on but when i swipe to unlock my tablet, nothing happens. Now matter how I swipe, nothing happens. The screen eventually just times out and goes off. This also means that I can't turn it off to reboot it. Sometimes plugging it in to the charger fixes this, but I usually just have to wait a while for it to start working again.
Anyone else have this happening to them??
Click to expand...
Click to collapse
If you press the power button and wait for the menu to pop up, does it respond when you press the screen? Having this issue as well and only a reset seems to fix it. I'm running 5.0.2

noahvt said:
If you press the power button and wait for the menu to pop up, does it respond when you press the screen? Having this issue as well and only a reset seems to fix it. I'm running 5.0.2
Click to expand...
Click to collapse
No, I can get the power menu to pop up just fine, but nothing happens when i tap it. I finally figured out that it would turn off after holding down the power button for a long time. But when I tried to boot it back up, it just got stuck on the "android" screen. I let it sit overnight and this morning was able to get it to boot up normally.
my 2012 Nexus 7 died after 13 months (1 month after the warranty ran out). This is my 2013 Nexus....guess how old it is (hint: 1 month out of warranty).

nvillamob said:
No, I can get the power menu to pop up just fine, but nothing happens when i tap it. I finally figured out that it would turn off after holding down the power button for a long time. But when I tried to boot it back up, it just got stuck on the "android" screen. I let it sit overnight and this morning was able to get it to boot up normally.
my 2012 Nexus 7 died after 13 months (1 month after the warranty ran out). This is my 2013 Nexus....guess how old it is (hint: 1 month out of warranty).
Click to expand...
Click to collapse
My nexus 7 is just 1 month old lol. But I assume that this is a software problem on lollipop since I do not experience this on kitkat

Yeah i think it's got to be software. Never had this on 4.4. This happens on my N7 and I get random reboots on my N4 ever since L came out.
N7 is completely stock an unrooted by the way.

+1 same issue, I encounter it once in 5 days
Sent from my Nexus 5

Phone not turning on.

Hi. So after a long wait I got my Zenfone 2 ZE551ML today. The first thing I did was turning it on and it turned on normally, then I proceeded to make the initial setup (logging into google account, etc) without any problems. Then after about 10 minutes of use the phone suddenly turned off with the battery being at around 35% and didn't want to turn on again. I read that old firmware (like the one that comes default with the phone) had battery display errors so I thought the phone had run out of battery, so I charged it for 8 full hours and I unplugged it now. To my surprise the phone is not turning on either. The only way I can make the screen show something is by connecting it to the charger, it vibrates and displays a white battery icon, eventually changing to fully green (fully charged battery, the green led indicator also appears) only to disappear like 3 seconds after. Can't turn the phone on while charged and can't even make the phone show the battery icon again (unless I unplug and plug again, repeating the cycle). So, what can I do to turn it on?
Thanks in advance.

xzifi said:
Hi. So after a long wait I got my Zenfone 2 ZE551ML today. The first thing I did was turning it on and it turned on normally, then I proceeded to make the initial setup (logging into google account, etc) without any problems. Then after about 10 minutes of use the phone suddenly turned off with the battery being at around 35% and didn't want to turn on again. I read that old firmware (like the one that comes default with the phone) had battery display errors so I thought the phone had run out of battery, so I charged it for 8 full hours and I unplugged it now. To my surprise the phone is not turning on either. The only way I can make the screen show something is by connecting it to the charger, it vibrates and displays a white battery icon, eventually changing to fully green (fully charged battery, the green led indicator also appears) only to disappear like 3 seconds after. Can't turn the phone on while charged and can't even make the phone show the battery icon again (unless I unplug and plug again, repeating the cycle). So, what can I do to turn it on?
Thanks in advance.
Click to expand...
Click to collapse
I have a feeling that you did not hold the power button long enough. Disconnect the charger first, and wait for about 10 seconds. Then, hold the power button for at least 6 seconds. The phone should then vibrate and then you may release the power button. Other reasons why your phone may not seem to be turning on at all might be due to the back cover not being fully locked in, thus not making any contact with the power on the motherboard itself.
Do report back the results.

Rizzed said:
I have a feeling that you did not hold the power button long enough. Disconnect the charger first, and wait for about 10 seconds. Then, hold the power button for at least 6 seconds. The phone should then vibrate and then you may release the power button. Other reasons why your phone may not seem to be turning on at all might be due to the back cover not being fully locked in, thus not making any contact with the power on the motherboard itself.
Do report back the results.
Click to expand...
Click to collapse
I did. Doesn't work. I also removed the back cover and pressed the power button with nails with no results either. Personally I think there's something to do with the power button as it doesn't even responds while charging (pressing it should display the battery icon) and the only time I could use the phone it didn't work to wake up the phone or setting it to sleep, only double tapping worked. What is strange is that it worked the first time I turned on the phone though.

Are you able to get into FastBoot mode? If so please try performing a hardware reset including wipe cache partition. Please see the following:
http://www.asus.com/us/support/FAQ/1011956/
If you have any questions or concerns please feel free to contact me direct at [email protected]. Please include a link to this review when/if responding.
Sincerely,
Frank
ASUS_USA

I got that several times when connecting my phone to the PC. I removed the back plate and disconnected the battery, after reconnecting phone booted up.
Sent from my ASUS_Z008D using Tapatalk

I am facing same problem.my zf2 power button does not work and unfortunately my mobile switched off.now I m not able to switch on again.nothing happen when I press power button. Is there any other way to switch on ?please suggest me if u get solution