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!

[Q] Power Button messed up

The power button on my S3 (SGH-i747) is pretty messed up. When i'm not touching it, it decides to register a press and completely messes up everything im doing on the phone. It has such frequent reboots that i can barely boot into recovery. The only way i can actually boot is by holding the phone horizontally with the power button facing down. Is there any fix to this? I'm on CM10.1.0 so would flashing back to stock decrease the sensitivity of this button? Or is it necessary to fix at the shop?
Also i have a cracked screen, so im not sure it would be accepted under the warranty even if it's unrooted.

r8revealed said:
The power button on my S3 (SGH-i747) is pretty messed up. When i'm not touching it, it decides to register a press and completely messes up everything im doing on the phone. It has such frequent reboots that i can barely boot into recovery. The only way i can actually boot is by holding the phone horizontally with the power button facing down. Is there any fix to this? I'm on CM10.1.0 so would flashing back to stock decrease the sensitivity of this button? Or is it necessary to fix at the shop?
Also i have a cracked screen, so im not sure it would be accepted under the warranty even if it's unrooted.
Click to expand...
Click to collapse
Hardware failure, repair it or get a new phone
nothing you can do, the flex cable that connect's the button to the board is either busted or shorted

Danvdh said:
Hardware failure, repair it or get a new phone
nothing you can do, the flex cable that connect's the button to the board is either busted or shorted
Click to expand...
Click to collapse
I'm having the same issue.
There's absolutely nothing I can do? I thought maybe if I'd open up the device and tinker with it... maybe I can get it working.

s1mpd1ddy said:
I'm having the same issue.
There's absolutely nothing I can do? I thought maybe if I'd open up the device and tinker with it... maybe I can get it working.
Click to expand...
Click to collapse
Yes this is quite an annoying problem. If you're having the same problem, are you able to boot into download mode? I can't for some reason.

r8revealed said:
Yes this is quite an annoying problem. If you're having the same problem, are you able to boot into download mode? I can't for some reason.
Click to expand...
Click to collapse
Something like this you don't want to boot into download mode. What if it resets while you're pushing a file? then your whole phone will be messed up.
I got mine to boot. My method is a bit unorthodox though.... i kept pressing the power button throughout the boot process up until the lock screen. Once it finally loads... i flicked the power button a few times really hard.... it seems to stay in the position but remains extremely sensitive.. as in, i dont even have to press it to turn off the screen.
sucks man... i think this is happening to a lot of power users. I'm literally one week past my warranty.

s1mpd1ddy said:
Something like this you don't want to boot into download mode. What if it resets while you're pushing a file? then your whole phone will be messed up.
I got mine to boot. My method is a bit unorthodox though.... i kept pressing the power button throughout the boot process up until the lock screen. Once it finally loads... i flicked the power button a few times really hard.... it seems to stay in the position but remains extremely sensitive.. as in, i dont even have to press it to turn off the screen.
sucks man... i think this is happening to a lot of power users. I'm literally one week past my warranty.
Click to expand...
Click to collapse
Yeah i didnt want anything to happen while anything is installing etc. I somehow got into recovery, but it shut down within a second. (thankfully the first option in cwm is reboot, so that saved me). I can't return for warranty because I'm rooted on CM10.1.0, which was why i wanted to attempt unrooting (but that seems impossible at the moment).
http://forum.xda-developers.com/showthread.php?t=1753574
That thread seems to be the solution to our problem, but i feel that if i open it up, something worse will happen. Right now, the phone boots up fine when held horizontally (but shuts down ~2min later) and i can easily backup my data.
One strange thing that i've noticed with this problem that maybe isn't right. Normally , do you have to hold down the power button to shut it off? I always used to think that a power menu would show, THEN you could select shut down, but here, it just shuts down. The power menu flashes sometimes, but shuts down anyway. This may also have me believe that something other than the power button is the problem.

r8revealed said:
Yeah i didnt want anything to happen while anything is installing etc. I somehow got into recovery, but it shut down within a second. (thankfully the first option in cwm is reboot, so that saved me). I can't return for warranty because I'm rooted on CM10.1.0, which was why i wanted to attempt unrooting (but that seems impossible at the moment).
http://forum.xda-developers.com/showthread.php?t=1753574
That thread seems to be the solution to our problem, but i feel that if i open it up, something worse will happen. Right now, the phone boots up fine when held horizontally (but shuts down ~2min later) and i can easily backup my data.
One strange thing that i've noticed with this problem that maybe isn't right. Normally , do you have to hold down the power button to shut it off? I always used to think that a power menu would show, THEN you could select shut down, but here, it just shuts down. The power menu flashes sometimes, but shuts down anyway. This may also have me believe that something other than the power button is the problem.
Click to expand...
Click to collapse
if you hold the power button for 5 seconds or more , it will skip that power menu and reboot. So this still sounds like power button to me.
thanks for the link, been searching everywhere... so fckin hard to search all the S3 threads on XDA. They need to consolidate

r8revealed said:
Yeah i didnt want anything to happen while anything is installing etc. I somehow got into recovery, but it shut down within a second. (thankfully the first option in cwm is reboot, so that saved me). I can't return for warranty because I'm rooted on CM10.1.0, which was why i wanted to attempt unrooting (but that seems impossible at the moment).
http://forum.xda-developers.com/showthread.php?t=1753574
That thread seems to be the solution to our problem, but i feel that if i open it up, something worse will happen. Right now, the phone boots up fine when held horizontally (but shuts down ~2min later) and i can easily backup my data.
One strange thing that i've noticed with this problem that maybe isn't right. Normally , do you have to hold down the power button to shut it off? I always used to think that a power menu would show, THEN you could select shut down, but here, it just shuts down. The power menu flashes sometimes, but shuts down anyway. This may also have me believe that something other than the power button is the problem.
Click to expand...
Click to collapse
Were you able to fix your problem with the fix in that link? I seem to be having the same problem as you.

No, I ended up buying a new phone (I was going to upgrade anyway). I took out the power button, but that wasn't the problem. In a way, it was the button under the button that was sensitive. I would have to take out the motherboard to see the exact problem.
Sent from my Samsung Galaxy S4 (SGH-i337) via Tapatalk 4

Problem gt-p5210 tab3 10.1.

I mean, I had the tablet on my desk with battery, more than 20%, and when I wanted to use it it was apparently off, it took me 5 min for starting, pressing the off button and then the volume. Has anyone ever been happen the same thing ? It was bought on March 2014, the last 4.2.2, and it has not given me any problems so far, without rooting. Thank you

Problem when charging
I recently installed the firmware 4.4.2 from Canada and I noticed when I charge the tablet can not turn off the tablet, I mean, if I charge the table on and turn off after few seconds the tablet turns on again, this happens to any one else? :silly:

radheck said:
I mean, I had the tablet on my desk with battery, more than 20%, and when I wanted to use it it was apparently off, it took me 5 min for starting, pressing the off button and then the volume. Has anyone ever been happen the same thing ? It was bought on March 2014, the last 4.2.2, and it has not given me any problems so far, without rooting. Thank you
Click to expand...
Click to collapse
Listen I have no real answer as about what happen. But I can say this for sure. We can not take the battery out. So there is a feature to do a software battery rest.
Just like Win7, Hold the Power Button for about 5 second and It will mimic a Battery disconnect, Do not do it longer than 10 seconds is a waits of time. If you are not sure you press it correctly, release it and try again but this time look at the button.
Now here is an issue. Depending where you are Holding JUST the Power button can behave differently.
A) Holding Power button forever, starting from Home Screen
..1)Turn your TAB3 ON and swipe to be in Home screen.
..2) Lets Press Power while holding, NO Release, so that wee can see what it does.
..3) You will see it will Power OFF, Then Restart. Nothing more Happen, just wait for ever on swipe screen.
B)Holding Power button forever, starting from POWER OFF
..1) Now use the normal procedure to turn your Tab3 OFF. Let it alone. at least a minute to make sure is OFF. Just for test purpose.
..2) Lets Press Power while holding, NO Release, so that wee can see what it does.
..3) You will see it Turn On, see the Samsung Logo and Turn OFF. Black Screen for ever will follow.
So as you see, it is possible you had your table OFF when you where continuously pressing the button!. Normal Behavior.
As for Why when Off, I do not know but I seen my table freeze from time to time and and even go off.
ubuntoscar said:
I recently installed the firmware 4.4.2 from Canada and I noticed when I charge the tablet can not turn off the tablet, I mean, if I charge the table on and turn off after few seconds the tablet turns on again, this happens to any one else? :silly:
Click to expand...
Click to collapse
Yes It does, charging while device is OFF. Some time it does not like to respond. In fact there are claims that 4.4.2 does not charge while off. If you have a kernel modified the you will see the BIGG Battery symbol. But still it is hard to respond.

I don't know if it is hw of sw problem is weird

ubuntoscar said:
I recently installed the firmware 4.4.2 from Canada and I noticed when I charge the tablet can not turn off the tablet, I mean, if I charge the table on and turn off after few seconds the tablet turns on again, this happens to any one else? :silly:
Click to expand...
Click to collapse
this happened to me a few times i just flashed the European firmware and its fixed

[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...

September Security Update (#11 - R16NW.N950USQS5CRI4) bricked my phone

Anyone else experience this after the most recent security update?
My phone rebooted after the update was installed, and the notification that the update was completing was visible in the notification bar. Then the screen timed out, since I wanted to let the phone just do its thing while finishing the update. The screen powered off, and it has been stuck that way for two days now. I've tried all manner of button presses to simulate a battery pull (Verizon officially recommends pressing and holding the volume down button and the power button to simulate a battery pull), but none of them work. I tried all combinations of the button presses with the sim tray pulled out, the charger attached, but nothing seems to work. I don't get any led indication either, just a black screen. I've tried charging it for a couple of hours, but don't get any red LED or other indication that it's charging at all. I think it's fully bricked, but wanted to know if anyone else had this happen and had any suggestions before I take it in for service.
thanks for reading

jerkface80 said:
Anyone else experience this after the most recent security update?
My phone rebooted after the update was installed, and the notification that the update was completing was visible in the notification bar. Then the screen timed out, since I wanted to let the phone just do its thing while finishing the update. The screen powered off, and it has been stuck that way for two days now. I've tried all manner of button presses to simulate a battery pull (Verizon officially recommends pressing and holding the volume down button and the power button to simulate a battery pull), but none of them work. I tried all combinations of the button presses with the sim tray pulled out, the charger attached, but nothing seems to work. I don't get any led indication either, just a black screen. I've tried charging it for a couple of hours, but don't get any red LED or other indication that it's charging at all. I think it's fully bricked, but wanted to know if anyone else had this happen and had any suggestions before I take it in for service.
thanks for reading
Click to expand...
Click to collapse
An update really shouldn't cause that.. How long have you held the buttons for? If you have a case protection on your phone take it off and then press the power button the Bixby button and the volume down button and make sure you have them all squeezed good and try to hold it for 2 minutes or more and if you still don't get anything then plug it in and then try again holding the buttons for at least 2 minutes.. If that doesn't work then you might need to have Samsung fix it for you under warranty if you still have warranty available..

You're right, it could be a coincidence, but one heck of a coincidence. If no one else is experiencing the issue, then it must be my phone. I tried holding the buttons for two minutes both charging and unplugged, no luck. Thanks for the suggestion though. I'm off to Verizon to see what my options are.

jerkface80 said:
You're right, it could be a coincidence, but one heck of a coincidence. If no one else is experiencing the issue, then it must be my phone. I tried holding the buttons for two minutes both charging and unplugged, no luck. Thanks for the suggestion though. I'm off to Verizon to see what my options are.
Click to expand...
Click to collapse
If the phone has been with you less than a year, Samsung will repair it for free since every phone has a 1 year warranty from the date of purchase.. Get a hold of Samsung and see if it's under warranty if it is they'll give you a shipping label and you just send it they'll fix it and send it back..