(Another) Bricked AC66U - Help needed

Hello all,

I just bought a bricked AC66U for really cheap in order to debrick and flip.

I saw so many guides throughout the internet that I thought it would be easy... but it hasn't...

So far I've tried:

• clear nvram
• Use Asus Firmware Restoration software
• TFTP from windows
• connect serial from raspberry pi > run "flash -noheader : flash1.trx" and immediately upload stock firmware via tftp

I've based my actions in the tutorials below:

• ...

(Another) Bricked AC66U - Help needed