Develop Bugs

Tab 3 7.0 Black screen problem

Hi,
So today i reboot my tab 3 7" and it doesn't show anything on screen, but i can hear the boot animation and when I lock and unlock the screen.
I didn't install / flash anything, its stock ROM.
I tried rebooting with pressing power button for a while, tried to get into recovery (i think i can enter but i can't see anything), and I don't know what else to do, please help anyone.
Also, i tried to connect to PC and it works, i can save all my stuff, but this is not the point.
I even unplug the battery and reconnect it...
For reference it's happening what you can see in this video (its not mine):
(youtube) /watch?v=oT2JpMI0BA8
help please

Begging for help- bricked ZL !

GUYS PLEASE HELP ME FAST !!!
I unlocked my bootloader.Restored my backup of existenz 3.50, flashed the verison 1 boot.img then the normal version, then the 1826mhz overclock. All this in TWRP. Then wiped cache and dalvik cache. Rebooted to system. So far, so good, it started the "upgrading android" which is normal after cache wipe and then THE SCREEN GOT BLACK !
Cant turn it on. Plug the usb in the laptop- only sound. Tried to turn the phone off and on again- i cant do it. Tried with the off button under the sim and microsd card cap- does nothing. Tried entering in fastboot- not working. Only red LED light when i plug the cable. Tried the power and volume up/down for 20 seconds- nothing !
Guys, please help me, please !
The phone is completely dead or it is on but not responding !
Little update:
I holded the off button for over 20 seconds. Same thing- black screen but now when i connect the usb, the light does not go on and there is no sound.
Fastboot is not working.
Seems dead.
I beg you to help me !
Screw it guys. Fixed it. It was on but completely locked up. Had to open it up and detach the battery connector.
I am willing to try the kernel again, but without the overclock option.

Cant access normal boot, fastboot or recovery, screen just goes blank at boot mode.

After FINALLY figuring out how to root this (the No Command recovery screen )
I was happy to get my root apps working and I had everything working perfectly...
The screen suddenly goes blank, at first I thought it had run out of power so I plug in the charger and nothing happened, it had been on 20% last time I checked so this seemed unlikely...
After several attempts to do a hard restart (Vol- and Power) I held down Vol+ and Power to access the boot mode selector and selected normal boot, the screen goes blank. Logically I then tried to boot into recovery (I have Philz Touch) and the screen goes blank, I was getting worried now (I have only had this phone for 3 weeks!). As a last ditch effort I tried fasboot but to no avail, If anyone else has had this issue and can help that would be greatly appreciated, I do not know what to do next...
Thanks,
Caleb

[SOLVED]
After leaving it on charge overnight it started up normally, I have no idea why this happened?!
Leaving this thread here in case anyone else finds it useful.....

I am using Nova launcher and I think this is related to the battery drainage once you go below 15%.

I have the same problem
Fev times go to selector "Recovery Fast boot Normal boot"
But after that, noting happens, when charging led not light, but charger is hot and near camera board (cpu is warm too).

Zenfone 2 Brick - NO LED - NO SCREEN - JUST VIBRATION

Hi, i couldnt find anything on google and youtube, so im here to ask you.
Every bricked situation has a USB Logo on screen or Android logo with ERROR message, BUT i have nothing on the screen. Just opening vibration and it keeps vibrate over and over again in 5-10 min. I dissambled my phone and disconnect battery from mainboard and re-connect it. It just keep vibrate when i re-connect it and it begins a loop. No led when charging, no adb connection (device not found error). Like i said, it keeps vibrate after 5-10 min last vibration. The time it vibrates again, adb finds my device but then it just lost connection.
HOW IT HAPPENED?
1. I was using official android 5 rom with root, I didnt get android 6 update
2. I tried to flash it via Recovery mode but it just didnt get in Recovery mode and it shows an ERROR message on screen. So i googled it and found a few solutions like wipe cache
3. I get in Recovery mode and tried to wipe cache again, but it stuck like 10 min so i forced close my phone. AAND no system i have.. It just didnt opening, ASUS logo with loading circle..
4. I flashed TWRP via ADB
5. so i tried to flash android 6 zip file via TWRP
6. it stucked, i waited over 10-20 min and i forced it to close(it stucked in "Splash screen installing", i though it must last like 1 min or 2 min maybe, its not the system its just opening animation)
7. NOW I HAVE A BRICKED PHONE WITH NO LED NO SCREEN JUST OPENING VIBRATION, cannot connect to adb, cannot get in recovery mode, nothing
Please give me some advices, im ready to try everything that can return my phone back.
English is not my native language, sorry for the huge grammer mistakes. I'm in a hurry and cant think about how can i make a sentence with perfect grammar.

up

This is the best guide : unbrick

Same PRoblem
if u get the solution please send it to me too at [email protected]

please update the links... i can't download the files i need.... thank you in advance...

This happened to me also . In my case i leaved my phone on charge (it was on low battery ) its keeps vibrating in 30 sec - 1 min interval , After some hours of this it finally booted to recovery (but i then rebooted bootloader then safe thing happens . Again after some hours it booted to recovery ) ,then i flashed stock ROM ,it failed but bootloader was back.
Hit Thanks if i helped.

Well, this happened with me, I needed open My phone and unplud batery cable and plug again. Easy to do.

same situation
I am facing the same issue at the moment.If you did fix it ,please reply with the solution or mail it to me at [email protected]
Thanks in advance

Oneplus 5t black screen unbricktool doesnt seem to work

I've got a dead oneplus 5t from my son. It was not charging anymore.. So I've replaced charging cable and battery.. Seemed to work it was charging... However it doesn't boot... No logo screen screen stays black/blank.
Tried several suggestions on this forum to get into recovery mode, fastboot mode... But still nothing. Only vibrating works after a few seconds.
So tried to unbrick with OP5T_Unbrick_tool_dumpling_43_J.40_181105(OOS.5.1.7) and the qualcomdrivers..
I was able to install the drivers and I see they are installed in devicemanagement.. and an empty folder create for oneplus.
I charged the phone all night and was able to download the upgrade. It then says download complete and I tried to restart the phone..
Still just vibrating but nothing happens.. Seems like everything has vanished from the phone, no recovery, no bootloader, no files.
So how to proceed to get all the stuff on the phone? And maybe the displayscreen is dead, but how can I tell?
Also tried the SMT upgrade. Strange thing is the device and com port are seen in devicemanagement and active when I connect without volume up, but cannot start because it says When I try to use smt mode the program says: "This COM port is disable by user". With volume button up pressed and then connect, ledlight turns green but the qualcomdevice is grayed out in devicemanagement and it says waiting for device..
Any help is welcome. I am a noob in how to proceed on the phone however I have an IT background.
Spent already so many time figuring out .. maybe it's effortless and its for the trashbin.
Thanks in advance

SOLVED
I opened the phone again loosened all those tiny connections to battery, screen,charger, mainboard and re-attached them.. Somehow a connection seemed to be fitting allright as yI looked at it, but apparently wasn't :good: