Help! Stuck on black screen and cannot get to fastboot - OnePlus 6T Questions & Answers

I tried unrooting my 6T and something went wrong. Now when it boots it shows the bootloader unlocked warning then goes to black screen and stops. It will randomly vibrate when I press the screen or the power button. My computer doesn't recognize it and I can't even seem to be able to turn it off completely. The only thing I can get it to do is reboot by pressing and holding the power and volume up buttons.
Any advice on how I can force it into fastboot or get my computer to recognize it so I can working on it?

roblpetty said:
I tried unrooting my 6T and something went wrong. Now when it boots it shows the bootloader unlocked warning then goes to black screen and stops. It will randomly vibrate when I press the screen or the power button. My computer doesn't recognize it and I can't even seem to be able to turn it off completely. The only thing I can get it to do is reboot by pressing and holding the power and volume up buttons.
Any advice on how I can force it into fastboot or get my computer to recognize it so I can working on it?
Click to expand...
Click to collapse
Keep pressing simultaneously volume up , volume down and power button all three of them until you get the fastboot screen.
It maybe takes a while...

roblpetty said:
I tried unrooting my 6T and something went wrong. Now when it boots it shows the bootloader unlocked warning then goes to black screen and stops. It will randomly vibrate when I press the screen or the power button. My computer doesn't recognize it and I can't even seem to be able to turn it off completely. The only thing I can get it to do is reboot by pressing and holding the power and volume up buttons.
Any advice on how I can force it into fastboot or get my computer to recognize it so I can working on it?
Click to expand...
Click to collapse
like the first answer:
hold vol up, vol down and power butten as long as the phone boots into fastboot mode and flash fastboot Rom OR
hold vol up and vol down for about 5-6 seconds, and plug your phone to your computer. if it gets recognized (with typical sound of windows) try msm tool. And be sure you have the qualcomm driver installed.

Related

[Q] LG G2 D802 can't get into download mode

Hi
need help!!!!!
My phone is completely messed up.
i got an update form LG.
after installing it the phone got suck in boot loop.
I has CWM installed.
i but could and even when try to install new rom it was still in boot loop.
i installed manual via adb commands TWRP.
and then thing became real bad.
no after it powers up i get the LG logo.
1 sec after i get few error codes and then black screen without ADB support.
i trierd to get into download mode after reading in forums that only this can help.
but I can't.
I powered down my phone in all possible methods:
power 10sec, power + V- 10 sec, power + V+ 10 sec.
after the phone is off i tried power it back into download mode with the next combinations:
power + V+ and then USB, power + V- and then USB,power + V+ and V- and then USB.
did not work.
can't get into download mode.
I will be happy to get some help.
Thanks
Ran :good:
sorry was wrong.
try turn phone off, add usb, then press volume up. I think that's it.
Hi
did no work also
I am having the same problem, went to lg service centre, they could not enter download mode as well. I might need to change the circuit board for $321 singapore dollars..
Hi
i think you have to use this fix: http://forum.xda-developers.com/showthread.php?t=2582142
This happened to me,
Try holding the power and volume down hold until lg logo, let go and press and hold the volume down and power again, it should get you in recovery.
It might get you into a screen called "Factory hard reset" Agree using the power button, and it should take you to your recovery, and try flashing a ROM along with the Gapps (if you want, which I did) and then I used a recovery file after booting back into recovery to restore it to my previous state.
Good luck :good:
Shut down phone
From what I got from this, you're having problems shutting down your phone, correct? It keeps booting back up after the screen goes black? If this is the case, hold the power button (and don't let go) until it goes black, reboots itself, then goes black again. Shouldn't take more than 2 seconds after rebooting to shut down. Then, you can do volume up + USB to get into download mode.
Ben_Z98 said:
From what I got from this, you're having problems shutting down your phone, correct? It keeps booting back up after the screen goes black? If this is the case, hold the power button (and don't let go) until it goes black, reboots itself, then goes black again. Shouldn't take more than 2 seconds after rebooting to shut down. Then, you can do volume up + USB to get into download mode.
Click to expand...
Click to collapse
Thanks for your help,it sorted out my problem! :good:

[SOLVED] "Downloading... do not turn off device" Help!

Before anyone links me to different threads, the device this is happening to does work, it is still a big concern of mine though
My problem is that when I press the Power and Volume up buttons to start up my tablet, instead of getting all of the normal options (Restart boot loader, Recovery mode) I get a screen that says "Downloading... Do not turn off target" and I'm stuck on start (Volume buttons do nothing) but start still boots my device and it boots like normal without pressing any volume buttons
If it helps, it started doing this after a crash which my have done something to the firmware (But I'm not the smartest guy on this site)
My device is stock but rooted with an unlocked boot loader
2haloes said:
Before anyone links me to different threads, the device this is happening to does work, it is still a big concern of mine though
My problem is that when I press the Power and Volume up buttons to start up my tablet, instead of getting all of the normal options (Restart boot loader, Recovery mode) I get a screen that says "Downloading... Do not turn off target" and I'm stuck on start (Volume buttons do nothing) but start still boots my device and it boots like normal without pressing any volume buttons
If it helps, it started doing this after a crash which my have done something to the firmware (But I'm not the smartest guy on this site)
My device is stock but rooted with an unlocked boot loader
Click to expand...
Click to collapse
On my N10, Power+Volume Down button will put it into "Downloading" mode and I have to press Power+Both Volume Up and Down at the same time to enter normal bootloader mode.
xIsei said:
On my N10, Power+Volume Down button will put it into "Downloading" mode and I have to press Power+Both Volume Up and Down at the same time to enter normal bootloader mode.
Click to expand...
Click to collapse
Well this makes me feel dumb, thanks for the answer

P9 lite cannot boot up only show device is booting

Hi Masters,
Need your advice here.
My p9 lite cannot boot up and only shows your device is booting now screen.
I cannot power off even force power off, and there is no responding whatever key combinations i pushed.
The step taken to this error is I did unlock my p9 lite and tried to flash twrp by following the guide, then I cannot enter fastboot mode and recovery mode after that.
I tried take out the battery and let the phone disconnect with power supply, after i put back the battery, i push the power key it still shows same screen as your device is booting now.
Any idea how to resolve this? I assume some fatal error with the motherboard, but i can say nothing after i unlock the phone.
Your suggestion and advice are much appreciateļ¼ thank you!
I had the same problem,what I did was force power off by holding power button for ,well idk how long but until device booted down,then I held volume down and connected it to pc,so it enters fastboot,but you have to do it fast,as it will reboot once its turned off.Then I tried various twrps,revolution recovery etc,and the only one that worked was meticulus twrp.I know you said you cant force power off,but try holding power key long
Once you hold the power off button, the phone will never power off, instead, the phone will reboot and bring you to the error page "your device is booting now" and stuck there. I tried to push the power up or power down button before i see huawei logo, but it will show me the same page.
Yes,when you hold power off phone will reboot,and you have to be fast with volume down and cable.Pre-plug the cable it computer ,bring it near phone,power off and before it boots plug it in while holding volume-
thank you for your suggestion. I tried many times, no matter how quickly i am, I only able to see the device booting page. I have mentioned one point above, i did take out the battery, and i see the error screen after i put back the battery, so i assume the problem with motherboard.
How many of you did return the faulty and unlocked phone to service centre then get "free" services?

[HELP] Phone won't open the bootloader on Moto G4 Plus

I was flashing the Lineage OS 14.1.2 using the latest TWRP custom recovery. I wiped the necessary partitions excluding the internal storage and i unknowingly hit reboot while the OS was not installed. The phone restarted and got stuck on the "Your device has been unlocked and can't be trusted." screen. I tried to open the bootloader again by holding power down+volume down and it restarted and again got stuck at "Your device has been unlocked and can't be trusted." screen, any help?
Hyp3rVen0m said:
I was flashing the Lineage OS 14.1.2 using the latest TWRP custom recovery. I wiped the necessary partitions excluding the internal storage and i unknowingly hit reboot while the OS was not installed. The phone restarted and got stuck on the "Your device has been unlocked and can't be trusted." screen. I tried to open the bootloader again by holding power down+volume down and it restarted and again got stuck at "Your device has been unlocked and can't be trusted." screen, any help?
Click to expand...
Click to collapse
Hold the power button down until the screen turns off, and at the INSTANT the screen turns off, begin holding the power button. The phone should boot into fastboot mode.
Not working
negusp said:
Hold the power button down until the screen turns off, and at the INSTANT the screen turns off, begin holding the power button. The phone should boot into fastboot mode.
Click to expand...
Click to collapse
It's not working still stuck on the same page
EDIT: It worked did you mean hold Volume Down?
Hyp3rVen0m said:
It's not working still stuck on the same page
EDIT: It worked did you mean hold Volume Down?
Click to expand...
Click to collapse
Good to know that it did work. Yeah, I meant to hold volume down.
Also, for future reference, when you force shut down the Moto G4, the first shutdown starts an autoreboot. So, you don't even need to continue holding the power button- you can release the power button after the screen turns off and just hold down the Volume Down button.

Hardware button don't work in bootloader?

Hey guys. I just got LG G6 H870 model. Unlocked bootloader without much problems, but issues came later. While being in bootloader I can't do anything, hardware buttons seem to not work. The only way to get out of bootloader is to use "fastboot reboot" command, but that prevents me from getting into custom recovery after flashing it. Only entering download mode works (holding volume up and plugin in usb cable). Non other key combination work until I boot into system.
Can this issue be somehow resolved?
I had similar problem myself with entering recovery more and the reason behind it was that I didn't press the button combo in proper way. what you actually have to do is while you in fastboot mode you press down and hold power button and volume down button. phone reboots after a moment and you should still be holding these keys and when lg logo appears you let go of power button for brief second and then press it back again and then when a prompt on white screen appears just go yes two times and phone shall boot in recovery mode . I had watch a tutorial movie to figure that out. other easy way is just to have adb enabled and reboot it with adb reboot recovery command via USB cable
non.verbal said:
I had similar problem myself with entering recovery more and the reason behind it was that I didn't press the button combo in proper way. what you actually have to do is while you in fastboot mode you press down and hold power button and volume down button. phone reboots after a moment and you should still be holding these keys and when lg logo appears you let go of power button for brief second and then press it back again and then when a prompt on white screen appears just go yes two times and phone shall boot in recovery mode . I had watch a tutorial movie to figure that out. other easy way is just to have adb enabled and reboot it with adb reboot recovery command via USB cable
Click to expand...
Click to collapse
No, because I had G5 and I know the proper way to do that. Problem is I can hold the power button as long as I live and the phone won't reboot, regardless of pressed combination or power button solo.
and the adb command way ?
Well... Nevermind, turns out vol down button isn't working at all.
still good way around is adb reboot recovery

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