(SOLVED) I used TWRP and accidentally wrote over the boot recovery partition

[NwotNot]

Hello,

In a late-night act of utter stupidity, when over-tired, I re-flashed the boot recovery with TWRP and bricked my M3. It obviously can't now enter boot recovery.

I've used TWRP and successfully re-flashed custom roms on my original Mate, and changed regions. (Not in any way an expert, I know how to follow instructions.)

I was trying to convert my Chinese (I was living there) ROM to UK. It's tricky nowadays.

This was a stupid error when tired. Any way back?

I read somewhere that people with the right hardware can do it, but finding someone. I'm in Leeds, UK.

The pad does (did) what I need, and I'm not in a position to buy a new one. If it's dead, it's dead; and I can move on.

Cheers in advance for any input.

SOLVED

See my last post on this thread.

After using Multi Tool V8 to enquire into the machine I switched off and rebooted.
It came back with a "Wipe cache" and "Reset to factory settings" Huawei screen, so I did both and - It booted!

It had spectacularly failed to do anything but boot-loop since coming out of a very dead battery yesterday.
1) Boot recovery, OTA recovery, and dload recovery from SD were all unavailable after the original overwriting of the bootloader.
2) After being dead for months, all recovery options booted from power button plus vol- Vol+ and Vol+/- - but still bootlooping.

Then, suddenly it booted into wipe cache/factory reset screen.
Android 7, EMUI 5.1.3

I have no idea why.

Now fully working. (Including restarting)

 

[qllkevuoi]

I fell in a similar situation after having flashed a magisk module .. unfortunately my nandroid backup didn't restore my devices, but I was able to enter in twrp recovery.. so,..

if you can boot in twrp recovery, not all hopes are lost..

first of all, you must download a stock firmware for your device (i suggest to download trough huawei firmware finder: https://forum.xda-developers.com/tools/general/huawei-firmware-finder-team-mt-t3469146/amp/)

You must download a fullota version of stock firmware

then, you can flash this firmware (3 zip files) trough hurupdater via twrp recovery: https://forum.xda-developers.com/ho...lash-official-firmware-recovery-t3769279/amp/

in order to not overwrite twrp recovery, put the twrp.img file in the same folder and rename it to recovery.img

you can find more info in this topic (follow the instructions, in particular those on how to use hurupdater): https://forum.xda-developers.com/me...ting-btv-dl09-to-unapproved-firmware-t3817541

in order to find a firmware suitable to your device, try to find info on it: you have a mediapad m3 European? American? asian? just wifi or also 4G-LTE (whit a sim and phone functions)? lite or normal version? 10 inches or 8.4?

everyone of these devices have different codenames and suitable firmwares

I found exact firmware for my devices with the procedure described here:
https://forum.xda-developers.com/showpost.php?p=77241673&postcount=3

.. but, if you flashed a wrong firmware, i really don't know if it might help you..

anyway, i wish the info above could help you.

 

[NwotNot]

I fell in a similar situation after having flashed a magisk module .. unfortunately my nandroid backup didn't restore my devices, but I was able to enter in twrp recovery.. so,..

if you can boot in twrp recovery, not all hopes are lost..

first of all, you must download a stock firmware for your device (i suggest to download trough huawei firmware finder: https://forum.xda-developers.com/tools/general/huawei-firmware-finder-team-mt-t3469146/amp/)

You must download a fullota version of stock firmware

then, you can flash this firmware (3 zip files) trough hurupdater via twrp recovery: https://forum.xda-developers.com/ho...lash-official-firmware-recovery-t3769279/amp/

in order to not overwrite twrp recovery, put the twrp.img file in the same folder and rename it to recovery.img

you can find more info in this topic (follow the instructions, in particular those on how to use hurupdater): https://forum.xda-developers.com/me...ting-btv-dl09-to-unapproved-firmware-t3817541

in order to find a firmware suitable to your device, try to find info on it: you have a mediapad m3 European? American? asian? just wifi or also 4G-LTE (whit a sim and phone functions)? lite or normal version? 10 inches or 8.4?

everyone of these devices have different codenames and suitable firmwares

I found exact firmware for my devices with the procedure described here:
https://forum.xda-developers.com/showpost.php?p=77241673&postcount=3

.. but, if you flashed a wrong firmware, i really don't know if it might help you..

anyway, i wish the info above could help you.

Thanks for the reply, and sorry for the delay. New child has somewhat taken over our lives!

I'll take a look at the tablet again when I have time, probably next month.

 

[NwotNot]

Update - Bootloader working after battery drain: Now what?

[Edit] Post redundant as it started working - see OP.

Thanks for the reply, and sorry for the delay. New child has somewhat taken over our lives!

I'll take a look at the tablet again when I have time, probably next month.

Well...

After being without power for so long I turned the tablet on and it booted!
However, it then went into OTA and updated - rebooted - and locked the damned bootloader.

1) It's showing as rooted.
2) Boot loader is locked.
3) Fastboot & rescue mode comes up.
4) Recovery (OTA) still comes up but "Fails" this time.

I don't recall how I unlocked it last time. I don't ever rememebr an unlock code.

Status:
Fastboot reports it exists.
ADB reports "Null" not found. (ADB drivers installed).
Firmware version: CPN-AL00C233B078
Device name: CPN-AL00
Serial Number: Showing
IMEI: Showing
Bootloader state: LOCK

I have an old TWRP backup - don't know how to use it.

Solutions?
a) Any kind devs prepared to work with me and find the boot unlocker code for this 5-year old tablet?
b) Any other solutions now we know what's what?

I'm self employed without income in this pandemic and can't really afford to buy a new tablet. If I have to, it won't be Huawei.
(There's a T3 10.6" at £89, but I'm not biting - I need to sort out a budget tablet with at least the oomph of the M3.)

Any help much appreciated. :good:

David.