Could I get some help with this black screen? - Samsung Galaxy S7 Questions and Answers

So I was running the Pixel Experience rom and then the phone randomly restarted. This has happened before but this time, it froze while rebooting and wouldn't turn back on.
Now, the phone is in a kind of "dead" mode. Won't charge, won't turn on. I can't boot into recovery or download mode as it won't boot at all. BUT it's still o. Its warm near the CPU area.
I read somewhere to just let the phone drain itself so I left it alone for about half a day and then I connected it into a charger and it worked. I charged it up to 17% (was 100% before all this started) and booted into the rom (big mistake) and the same thing ended up happening a minute into usage.
I can tell it's probably a software issue and not hardware but its been a day since then and the phone in the same "dead" mode but this time isn't warm on the CPU area, just dead. I'm really lost right now on what to do.
If there's anyway to flash the phone while off (like an MTK device) I'd appreciate help with that. I'd love any other forms of advice as well.
Thanks

How vol. Down + home button + power while phone is plugged in for 20 seconds. If it doesnt work maybe a usb jig can help you(costs 5$) and still works

kpwnApps said:
How vol. Down + home button + power while phone is plugged in for 20 seconds. If it doesnt work maybe a usb jig can help you(costs 5$) and still works
Click to expand...
Click to collapse
I've bought the jig and its arrived. I put it in but nothing happened. Am i supposed to do something else with it?

xl8rt99 said:
I've bought the jig and its arrived. I put it in but nothing happened. Am i supposed to do something else with it?
Click to expand...
Click to collapse
battery could be dead. I have a jig and it works on my S7 and S7 edge

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Hmm. Major Issue Need expert help!

Hi all. I have years of rooting under my belt but this is the first Samsung phone i've owned and I've got quite an issue. I was playing a game and the phone just shut off on me. I went to restart it and nothing. Did a battery pull, i felt it vibrate like it was trying to turn on and still nothing. So I tried to boot into cwm using volume up/down and power and the Samsung splash screen flashes for a split second and then shuts off and the phone just vibrates like it's going to turn on but won't do it.
So I tried battery pulls, holding power down, and now when I plug it into the computer it vibrates every two seconds but won't turn on. What's the deal this seems like a major hardware malfunction and Odin/CWM none of that stuff is usable because it just won't boot into anything.
So last resort do you guys have any suggestions i'm all ears :-(
I've had this a few times before... I forget which one exactly but either vol up + power button...or vol down + power button gets you to download mode and then you can flash the softbrick fix.
or if you do manage to get to CWM, you'll need some quick fingers to get to the "install zip" option before it reboots. once in there you're good to flash your ROM.
or, get a USB jig to get to download mode and flash soft brick fix.
Sent from my SAMSUNG-SGH-I727 using XDA App
NO dload mode either? if not make sure you have charged battery and than try to get into dload mode.
2leaponover1 said:
Hi all. I have years of rooting under my belt but this is the first Samsung phone i've owned and I've got quite an issue. I was playing a game and the phone just shut off on me. I went to restart it and nothing. Did a battery pull, i felt it vibrate like it was trying to turn on and still nothing. So I tried to boot into cwm using volume up/down and power and the Samsung splash screen flashes for a split second and then shuts off and the phone just vibrates like it's going to turn on but won't do it.
So I tried battery pulls, holding power down, and now when I plug it into the computer it vibrates every two seconds but won't turn on. What's the deal this seems like a major hardware malfunction and Odin/CWM none of that stuff is usable because it just won't boot into anything.
So last resort do you guys have any suggestions i'm all ears :-(
Click to expand...
Click to collapse
False alarm, apparently there is a battery bug reported on other forums. My phone had read 100% for quite awhile and I was digging the battery life but apparently i was over zealous. The meter was reading 100% but the battery was draining and the phone died. It wouldn't fire up until i left it on the charger for awhile. Very odd, guess I will delete this post and research this battery issue... unless someone else knows more about it
I have the same battery issue, but only when I use my car charger. When I take it off the car charger, it will read 100% till I reboot. Only after reboot will it start reading the battery state correctly. I DO NOT have this issue with the house charger...... Strange.
you guys after charging for 100% go to cwm and format battery status this will probably resolve ur issue.

[Q] Let battery die after flashing new rom, now it wont charge

Ok guys, I'm in a predicament, I flashed the latest AOKP build 3 (clean flash) flashed IMOv.16 cache/dalvik/permissions and everything worked great. This was around 2pm. I spent the rest of the day just messing around with settings getting it how I liked it. even after several reboots. Now my battery dies around 11:45pm so I plug it up and it vibrates once, the charge screen shows for a second but the charging icon doesnt spin and then cuts off. tried it for about 30 minutes in the wall, 30 minutes from usb from computer, now its been in the wall for about an hour, if I unplug and plug it the phone does nothing, but if I pull the battery put it back in and plug it up to either power source the charge screen shows for about a second and then cuts off, but nothing happens after that any suggestions? has this happened to anyone else? what should I do?
Ok im not sure why that happened, but I fixed it. I pulled the battery, put it back in and instantly help VOL down + Home + Power and I got it tothe screen before Odin. So I was going to flash stock, but I figured if i can get into Odin I can get into recovery so I pressed down to restart phone instead of up to enter odin mode and it restarted and booted up, with a significant charge on it! Phew thought I had done something bad! :victory: My blood pressure is returning to normal now, but why did that happen in the first place? Will it happen again if my battery dies?
davidtb12 said:
Ok im not sure why that happened, but I fixed it. I pulled the battery, put it back in and instantly help VOL down + Home + Power and I got it tothe screen before Odin. So I was going to flash stock, but I figured if i can get into Odin I can get into recovery so I pressed down to restart phone instead of up to enter odin mode and it restarted and booted up, with a significant charge on it! Phew thought I had done something bad! :victory: My blood pressure is returning to normal now, but why did that happen in the first place? Will it happen again if my battery dies?
Click to expand...
Click to collapse
Outstanding work! My blood pressure is down now too.

Xoom locked up completely

Hi
Hoping someone can point me in the right direction.
Basically my xoom seems to be suffering from a problem that quite a few people seem to have had. It locked itself one day when it hadn't been used for a couple of minutes and that was it. Tried the holding of power button + up put it on charge and left it with the green light on for 3 hours still nothing.
tried disconnecting the battery and left it disconnected for a day to see if that worked- Nope
tried a new battery - nope
Tried new top part of case with power switch and volume buttons - nothing
As a last resort I bought a factory reset cable - plugged in and plugged into charger as well and after holding the vol up+down for 20 seconds and then holding the power with them it suddenly sprang to life.............
Now its working fine while all plugged in but the moment I pull the usb cable out its off.
So is this pointing to the battery? ( I have replaced it but its not a Motorola original)
Could it be a charging problem, Although its showing as charging (I haven't pulled the cable yet when fully charged as its still charging but it was at 61%)
or is this something else.
Thanks for any help that anyone can give me
Sorry to hear of your problem, but you may get more responses if you specify which model you have.
wooly1 said:
Sorry to hear of your problem, but you may get more responses if you specify which model you have.
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Click to collapse
lol I spent so much time trying to make sure I remembered everything tried that I forgot the basc info
Its a mz604 wifi only UK xoom
Fingers crossed someone might have an idea?
OK, I may have had some success!
I managed to get it booted up again on the cable and did a battery re-calibration. Pulled the cable out and it powered off again straight away but.................... When I pressed the power button it has booted up and seems to be running fine again.
I'm going to run the battery fully down and then see what happens after a charge so fingers crossed may be good news.
series hoping
ookmonkey said:
OK, I may have had some success!
I managed to get it booted up again on the cable and did a battery re-calibration. Pulled the cable out and it powered off again straight away but.................... When I pressed the power button it has booted up and seems to be running fine again.
I'm going to run the battery fully down and then see what happens after a charge so fingers crossed may be good news.
series hoping
Click to expand...
Click to collapse
The battery re-calibration is only an Android OS issue, and shouldnt be doing anything like this. It gets reset every time you unplug your device from being fully charged.
This almost sounds like a defective battery or a loose battery connection inside. Its possible that unplugging and plugging the battery back in fixed the issue.
Best of luck to getting your tablet back up and running.

[Q] Phone wont turn on after not using for a month.

was running a solid PA 5.0 Rom then My screen broke about a month ago so I broke out one of my cheap $30 Wal-Mart phones until I decided what to do with it. Finally decided to get a screen + digitizer kit, replaced it all no problem went to turn it on and had a red light blink for a few seconds and then nothing. . Tried all volume & power button combos but no dice. Been trying and googling for days now. I can plug my phone into a pc and get it into adb fastboot mode by holding vol- and power button sometimes it gets recognized a mtp usb device but wont install any drivers and if I hold all three buttons it shows up as qhusb_bulk but it still won't boot up normally tho and nothing displaying in the screen. bought it from swappa over a year ago so the warranty is probably up. any suggestions?
qhusb is a brick. Try and follow this guide:
http://forum.xda-developers.com/google-nexus-5/general/fix-unbrick-nexus-5-stucked-qualcomm-hs-t3043301
I had the same thing. Phone in a drawer and red light fluttered then that was that. I put a new battery in.
As you probably know when the battery dies there its in fact 10% left for boot up. In my case it had gone to zero so there was nothing to power the charging circuits etc. Worked for me. I found a way to charge the other later and it's a spare
SENT BY ENTANGLEMENT
theesotericone said:
qhusb is a brick. Try and follow this guide:
http://forum.xda-developers.com/google-nexus-5/general/fix-unbrick-nexus-5-stucked-qualcomm-hs-t3043301
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Click to collapse
alright did that now it gets recognized on my computer as normal and phone vibrates when i turn it on, guessing the screen i got was bad cuz that still doesn't work, I'll just send it back and get a new one. many Thanks!

blocked on black screen

Hello,
Ive tried to look for a similar situation in other thread but each case is different so i open a new one.
This morning, when i took my idol 3 the screen did not switch off when pressing power button. I thought it was battery but when i plugged charger,nothing happened except the led is on continuously. I kept power button pressed for 10 seconds. The phone vibrates shortly but still a black screen, no sound and no reaction from the touch panel. Power+vol+ did not led me to my twrp recovery. What can i do now to get it work again? The phone is rooted with Rom Eu 4.2 from murigny64 and it is the first time i encounter this issu. Thanks in advance for helping me
Tonight i disconnected the battery for about 30min then connect it again. Then i tried to start in recovery: Just a vibration but no display and no sound. I unplugged/plugged the battery again and try to start. Same problem. What the hell could happen? Maybe a deffective hardware
Insist on boot ( normal or in to recovery with vol + and power).
That is a hardware brick.
Happened to me to some times, insist, it will unbrick
persona78 said:
Insist on boot ( normal or in to recovery with vol + and power).
That is a hardware brick.
Happened to me to some times, insist, it will unbrick
Click to expand...
Click to collapse
Hopelessly i tried to restart several times before you post your message. But im gonna try again.
I charged the phone all the night but nothing better and the phone is not detected on pc so no adb action possible.
Maybe the battery is dead...
nigloud said:
Hopelessly i tried to restart several times before you post your message. But im gonna try again.
I charged the phone all the night but nothing better and the phone is not detected on pc so no adb action possible.
Maybe the battery is dead...
Click to expand...
Click to collapse
Can be, can be to... To bad if is battery.
But still trying to boot, is very difficult to.
.
thank you for advise but it's still not working. I spend about 30 minutes trying different combination of button: power pressed until it vibrate, power+vol up, power+vol down, power+vol up & down, discontinuous press of power with charger and no charger....and so on. Its a complete failure.
If it is the battery, there was no sign of weakness before (short life, random shutoff, ....) . It happen suddenly: I lock my screen before sleeping and the next morning no way to switch it on again.
I thought I would avoid problems for long with a twrp recovery, a backup and adb tools on my pc.....but for hardware issues its useless.
How can I be sure it is battery before purchasing another one ?
nigloud said:
How can I be sure it is battery before purchasing another one ?
Click to expand...
Click to collapse
There is also possibility that your screen has been broken
Sent from my 6045I using Tapatalk
belkoo said:
There is also possibility that your screen has been broken
Sent from my 6045I using Tapatalk
Click to expand...
Click to collapse
If it was the screen the touch panel would work and i could sense vibration when typing the pin code no?
The led bright continuously when i plug instead of flashing slowly as it used to do when charging. That why i think its battery.
...and when i start in recovery the phone is not detected on my pc
That's hardware brick. Don't give up, try to boot, normally or in recovery, keep trying it will boot.
Have you tried to open the phone and disconnect battery? Custom ROMs made me similar issue a few times.
jani0417 said:
Have you tried to open the phone and disconnect battery? Custom ROMs made me similar issue a few times.
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Click to collapse
Wtf idol 3 has non removable battery haha
Sent from my 6045I using Tapatalk
belkoo said:
Wtf idol 3 has non removable battery haha
Sent from my 6045I using Tapatalk
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Click to collapse
Therefore the back can be dismantle and we can access battery and that s what i did.
Yes i disconnected it for several hours and pluged it again but it gave me the same result. And now it doesnt vibrate anymore when i keep the power button pressed a while.
I purchased a battery on internet and im waiting for delivery to test if im right or not. Il feedback about the test.
Anyway its nice from you to look for any solution. Thanks
nigloud said:
Therefore the back can be dismantle and we can access battery and that s what i did.
Yes i disconnected it for several hours and pluged it again but it gave me the same result. And now it doesnt vibrate anymore when i keep the power button pressed a while.
I purchased a battery on internet and im waiting for delivery to test if im right or not. Il feedback about the test.
Anyway its nice from you to look for any solution. Thanks
Click to expand...
Click to collapse
I guess you did everything properly, so just one thing: at first time when I did this, I choosed the wrong cable (which didn't 'reset' the phone), so I hope you pulled both out.
jani0417 said:
I guess you did everything properly, so just one thing: at first time when I did this, I choosed the wrong cable (which didn't 'reset' the phone), so I hope you pulled both out.
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Click to collapse
I think i choose the good connection: This is the one over the battery with 6 wires: 2 red, 2 white and 1 black (see picture attached). I just left it with a small screwdriver to disconnect.
nigloud said:
I think i choose the good connection: This is the one over the battery with 6 wires: 2 red, 2 white and 1 black (see picture attached). I just left it with a small screwdriver to disconnect.
Click to expand...
Click to collapse
Yep, that's it
Hello,
I received the new battery today.
So i unpacked it, i unplugged the old one and plugged the new one ...and guess what happened......the same bevahiour as with the old battery: when i press the button power, it vibrate but it doesnt start neither in recovery nor in normal mode.
I just precise that the new battery is charged at 50%........:crying:
So the problem is not the battery but it was the only thing i could test by myself before sending the phone to alcatel for repair.
Im still wondering what could happen to my idol 3: It had been woking perfectly for months and one morning with no warning, it refuse to switch on. Ok sorry for annoying us and hope it wont happen with yours.
I hope alacatel will apply the guarantee although the phone is rooted and bootloader unlocked....because its a hardware issue i think.
Hello,
Just to conclude. The phone got back from repair after 10 days. They have changed motherboard, battery and also the back that was damaged. Its a brand new phone .

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