et9000 stucked on "filesystem already rw, not remounting"

[MrKappa]

Hello', my box is currently stucked on booting with the message "filesystem already rw, not remounting". I see that this issue is quite common but most of the cases its possible to recover re-flashing the bootloader and images. I have tried too following some recommendation from the forum etc but without luck. Where can i find some procedure to test before shipping the box to vendor as last attempt? It still not possible to use the serial port, right? Thanks

 

[GMTH63]

Have same problem, anyone any ideas.
thanks