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[Q] Struck on bootloop. No usb debugging. Locked bootloader.

The power button on my N5 started acting up, like if i even press it once it will show me the power off option. After that it started to randomly reboot. Now its reboots every 2 sec showing the google logo. When it try to put it in recovery mode, it again reboots. Randomly like 20 in 1 trys it stops in the recovery mode.
1. I tried to factory data reset. I got an error msg something like " Cant mount cache ".
2. Called both Lg and goole for a replacement, but my warranty got over.
3. I unlocked the bootloader using fastboot and tried to flash stock rom, but after the first reboot bootloader command the bootloader again comes to locked status. Still after all process the phone reboots and gets to the booting animation, but it does not move past that( even after an hour).
Device was in full stock condition when this happened. Someone please help me out!!

shaveender said:
The power button on my N5 started acting up, like if i even press it once it will show me the power off option. After that it started to randomly reboot. Now its reboots every 2 sec showing the google logo. When it try to put it in recovery mode, it again reboots. Randomly like 20 in 1 trys it stops in the recovery mode.
1. I tried to factory data reset. I got an error msg something like " Cant mount cache ".
2. Called both Lg and goole for a replacement, but my warranty got over.
3. I unlocked the bootloader using fastboot and tried to flash stock rom, but after the first reboot bootloader command the bootloader again comes to locked status. Still after all process the phone reboots and gets to the booting animation, but it does not move past that( even after an hour).
Device was in full stock condition when this happened. Someone please help me out!!
Click to expand...
Click to collapse
You should ask questions in the Q&A forum. However i think that it cant be a software problem at all, its the power button, you shold take it to repairs and replace it.

shaveender said:
The power button on my N5 started acting up, like if i even press it once it will show me the power off option. After that it started to randomly reboot. Now its reboots every 2 sec showing the google logo. When it try to put it in recovery mode, it again reboots. Randomly like 20 in 1 trys it stops in the recovery mode.
1. I tried to factory data reset. I got an error msg something like " Cant mount cache ".
2. Called both Lg and goole for a replacement, but my warranty got over.
3. I unlocked the bootloader using fastboot and tried to flash stock rom, but after the first reboot bootloader command the bootloader again comes to locked status. Still after all process the phone reboots and gets to the booting animation, but it does not move past that( even after an hour).
Device was in full stock condition when this happened. Someone please help me out!!
Click to expand...
Click to collapse
Yeah, definitely sounds like a hardware power button issue. You can still contact LG to repair it for a fee even though the warranty is expired. If you don't want to do that, you (or a tech-savvy friend) can try tearing it apart to see if it's stuck or if there's residue or something like that. This article also has some suggestions, but I don't think they'll be very useful as your power button appears to be stuck down.

[Completed] Device won't work, can't get into recovery mode

Hello, I have a big problem, I have a Plum Axe Plus 2, android 6.0, I wanted to root it so I unlocked the bootloader, (just that haven't root it yet), everything was working fine until I restarted the phone and it wouldn't pass from the logo screen, so I press volume down + power button and it appeared what I think is a virus (here is the video: youtube.com/watch?v=b18iDZZi0QA, I connect it to the PC and it recognize it, I could see the storage and everything so I manage to enter the recovery mode putting the adb reboot recovery command, I reset it and well I thought everything was fine now but when I power up the phone it stay on the logo again, I tried to enter the recovery mode but the same virus pop up, I connect it to PC and I still can access the storage but now it tells me that the device is unauthorized, so what can I do? how can I get rid of that virus ? please help me, I can't afford to buy a new phone.

Update: I manage to enter the recovery mode from the fastboot menu, so I could reset the phone again, but I don't even dare to power it off or restart in fear the same happens again, what should I do?

Hi !
Perform a factory reset , any virus you`ve got , though I doubt about it , will be erased

No boot to Fastboot Mode after flashing/restore

Hi,
I was on Android N and decided to go back to KangVip Slim trough my TWRP Backup. So i opened the Bootloader again and flashed TWRP. But restoring of my backup failed and i started to wipe and delete in TWRP different things. I think i erased to much...
The result is, that now i the phone is booting to Huawei Logo and stucked there. All button-combinatios don't work.
No stock recovery, no dload method and the worst thing...no bootloader mode (USB connected to PC). The phone just reboot to the Huawei Logo.
I opened the phone, remove the battery cable, put it back, but it's still the same. I also discharged the battery and charged again. Same result, it boots just to the Huawei logo.
Is there any thing i could try to bring back to life or is it hardbricked?
Thanks in advance for any idea..

AL10 or L29,L09 to you have?
With AL10 version is easy to go back.
Install Android N again in Twrp.
Install Stock Recovery.
Go Back with Hi Suite.
Your open your Phone to reboot?
Press Power Button 10 sec. to reboot after reboot press 3 sec. to boot in eRecovery and shot down the Phone.
After Power off press Volume Down and hold and put in the Usb Cable in the Phone.
After this boot in Bootloader.
Flash Twrp for android N and wipe Cache,Dalvik,Data and System.Then flash Android N in Twrp.

Hi,
i have a L29. No TWRP, no bootloader mode to flash anything.

What happens when you switch off,then Power on and Press so long Volume up until the erecovery starts?
This must work!

Nothing, just reboot to the Huawei logo. I think there is no e-recovery installed.

Tavros said:
Nothing, just reboot to the Huawei logo. I think there is no e-recovery installed.
Click to expand...
Click to collapse
letschky said:
What happens when you switch off,then Power on and Press so long Volume up until the erecovery starts?
This must work!
Click to expand...
Click to collapse
Let me add one more step. Connect your phone to the computer via usb cable then switch off your phone. Press and hold Vol up + Power. Release it when you see Huawei logo.
Hope this will enable you to enter eRecovery.
Good luck

I tried that, but no success..
I think the Mate 8 is the first phone that i have brick...

I have the same issue too. L29. No TWRP, no bootloader mode to flash anything. Hopefully someone can guide us through this

Good news..
After I put the phone aside a few days and the battery has completely discharged, I connected the phone with my PC and tried to get into the fastboot mode.
I tried this before, without success. I was shocked when I saw the bright screen! It was in fastboot mode. I did not expect that. I left it untouched until the battery was charged a little bit.
Then i started to flash the NXT-L29C432B560 Firmware. It wasn't possible to do it with the "dload" method, so installed twrp-3.0.3.img and flashed the firmware with TWRP. For help use: https://forum.xda-developers.com/mate-8/general/how-to-install-nxt-l29c185b560-official-t3556789.
And now it works fine, like never something happend.
So all of you with same problem: Give it a try.
Now i have two babies.. Mate 8 and Mate 9. I will keep both....:good:

HI i have my mate 8 in the same conditons that you used to! please help me im desperate it doesnt even get on fastboot mode. Please I would appreciate your help thanks

dexz said:
Let me add one more step. Connect your phone to the computer via usb cable then switch off your phone. Press and hold Vol up + Power. Release it when you see Huawei logo.
Hope this will enable you to enter eRecovery.
Good luck
Click to expand...
Click to collapse
Hello!
I can do that with my mate 8, but only things i can access are erecovery, stock recovery and dload mode. neither of them work.

dcds_dck said:
I have the same issue too. L29. No TWRP, no bootloader mode to flash anything. Hopefully someone can guide us through this
Click to expand...
Click to collapse
Had this problem with L09. I've been trying to fix it all the week long.
If you can access dload mode, follow this guide:
https://forum.xda-developers.com/mate-8/general/huawei-mate-8-downgrade-android-7-0-to-t3530999
If your phone is not NXT-L09, search for NXT-XXX (XXX= your phone model) rollback. It will surely work.

Unable to boot, enter flash mode or enable USB debugging after 'succesful' flash

I use this forums a lot for info but in this case i can't find any leads of whee to go with this, so wondering if someone can chip in some ideas?
I flashed a ROM via flashtool but wasn't happy with it, so i thought i'd just go back to stock and so used flash tool AKA emma to flash one of the options given there.
First attempt to flash it said "flash failed" or something like that and had the "flashing failed, connect to computer" note in the phone when booting it. (I'm sort of making up the terms, not that much into the tech ). Anyway, i tried flashing the same FW again and this time it went through really quick being 'completed' in a few seconds.
Now when i try to boot it gets stuck in the 'Sony' logo. Can go into Fastboot but no Flash Mode (nothing happens using the vol down key), and USB debugging seems to be off now as well.
Emma only works in Flashmode so can't do anything with that. Flashtool doesn't offer anything useful in Fastboot and Xperia Companion recognises the phone when in Fastboot but asks that i unlock the screen and enter MTP...
Any help of where i can go with this?
Thanks
P.s. While keeping buttons pressed randomly it went once into flash mode, but trying to flash a ROM with flashtool it got stuck at "reding device data" and i haven't been able to enter the mode again. Is there an alternative key press combination that i stumbled on by chance? I think i just kept vol up and power held for a while and let go at a random number of phone vibrations

Just tried: Flashed twrp via fastboot and then rebooted into recovery. Same thing. It still opens to Sony splash screen and stays there

Ok, i'm kind of talking to myself here, but mild success and something that might help someone.
Managed to get back in flash mode. Don't know if it's a fluke, unique to this phone, or how it's actually meant to work, but the sequence is:
From the freezed up splash screen, and the USB connected, press and keep pressed power+vol up (hard restart/shutdown)
You get a single vibration, if you let go here it restarts. Keep pressing
You get a triple vibration, if you let go here it shuts down. Keep pressing
You get a single vibration, if you let go here it starts in fastboot. Keep pressing
You get a second single vibration, if you let go here it starts in flash mode.
Possibly a fluke but don't want to have to try again!
Anyway, i managed to flash the last working firmware and it's all good, yet this is the unwanted one. So issue is i still need to downgrade the phone to 7.1.1

Bootloop, Mi logo doesnt even show up

I've tried to install new system in my Xiaomi Redmi Note 4 MTK.
From the system that I downloaded (I downloaded the correct version) I picked in TWRP to install from boot.img.
Unfortunately the system didnt boot but I could still enter recovery or fastboot.
Then I chose preloader.img and clicked reboot because I thought that at the worst case I'd jsut enter fastboot and fix it.
After this the screen doesnt lit up at all.
The only response is the vibration.
It keeps rebooting over and over again.
Is there any way to save it?
It seems to stop bootlooping when I hold all the buttons at once for a while but when I hold the power button the bootloop starts again.

Re-flash Stock ROM

Is it possible in my situation when I can't access recovery and fastboot?
Can you please tell how can I do that?

Have you tried: With phone off, hold volume up, and insert usb cable. This should turn the phone on and go into download mode or something like that.

TouchOdeath said:
Have you tried: With phone off, hold volume up, and insert usb cable. This should turn the phone on and go into download mode or something like that.
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I believe its called the fastboot mode and as I said I unfortunately can't go there :/

Yes, we are talking about Mi logo stuck problem during boot. ... OR mobile goes in bootloop where every time shows Mi logo on the screen and shut House Cleaning Services Dubai

While installing your stock rom for your mediatek phone using sp flash tool just click the format all + downlaod option. This may blank out your imei and personal phone specific info

guys plz, you're talking like if I had any access to my phone.
I think I wrote it quite clearly that the only response that I get are vibrations and I dont see Mi logo. It's on for like a split second. Can't go to fastboot or recovery.
I talked about it with a guy on discord and it's loading preloader before boot that should go first so it can't be helped without valid tools. Makes sense to me, already bought a new phone.