Hard Bricked-moto-g31-xt2173-3

[artvandeley]

I was trying to downgrade to Android 11 due to all problems with Android 12 and something went wrong in the flash process and now the phone is bricked. Before flashing i successfully unlocked the bootloader and got the warning screen on bootup.

Now the phone is not recognized when plugging it into the computer, and I cannot get it to respond to any hard key presses that would normally get it into fastboot or recovery mode.

I have opened it up and tried disconnecting the battery before plugging it into the PC to force it to go into BROM mode, nothing happens. I have tried a myriad of different drivers and tools and checked that other mediatek devices are correctly recognized which they are. Even in bootrom mode. The G31 is not recognized at all

I have seen that some phones are able to use test points on the motherboard to force some kind of low level BROM mode but I have not found any information on this for this particular model. The chipset is a Helio G85.

Too bad this nice phone is just a paper weight. This is the first time I have not been able to recussitate a wrongly flashed phone. I've fixed bricked phones, tablets and routers before but this was seemingly impossible...

Any suggestions?