HTC One Mini M4 - S-ON - Stuck on Bootloader. Can't unlock, Can't flash recovery

bellskar

Member
Aug 23, 2011
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I am not able to fix my dad's HTC One Mini M4. It just starts into bootloader screen and can only be switched to HBOOT and vice versa. Screen on the phone is attached.
>> Interestingly I have also damaged the volume buttons and they just don't work. While replacing the battery the volume flex was unintentionally pulled out of the board and now it has no connection to the board whatsoever.
Only power button can switch the modes from bootloader to HBOOT or HBOOT to bootloader.
>> I am not sure if any firmware is still there on it. I am not sure what RUU I need to use in that case.
here's what I have tried so far.
I tried to flash recovery but it fails at (bootloader) signature checking.
-- log
D:\Mobile>fastboot flash recovery twrp.img
target reported max download size of 800227328 bytes
sending 'recovery' (11460 KB)...
OKAY [ 1.549s]
writing 'recovery'...
(bootloader) signature checking...
FAILED (remote: signature verify fail)
finished. total time: 2.472s
I tried unlocking the bootloader in a normal fashion (via htcdev), following log is presented on the command prompt and no prompt on the phone's screen appeared.
D:\Mobile>fastboot flash unlocktoken Unlock_code.bin
target reported max download size of 800227328 bytes
sending 'unlocktoken' (0 KB)...
OKAY [ 0.163s]
writing 'unlocktoken'...
(bootloader) unlock token check successfully
OKAY [ 0.016s]
finished. total time: 0.178s
Is there anything could be done with this phone as the screen on the phone is attached with this thread?
Any help will be appreciated.
Thank you