Nope, he is stuck/bound on 480 (Switzerland, nice one I use since years ).

He should post here verbosely all steps with all command lines he did (especially the last ones) and with all ouput/error messages ...

Else no one can miraculously guess what is going on.

command to execute:
flasher -f -F main.bin -F eMMC.bin
if after this command (with no errors during flash) the device still behaves badly (and I still have no clue what he means with that) then I assume a HW failure...