Updated bios to apu2_v22.214.171.124 and disabled the watchdog, because this was a new option
And i didn't know what it was for. Now i CANNOT enter the bios anymore, for the option "press F10"
Doesnt even show up! So my urgent question is... how do i get to the bios settings?
With watchdog disabled, you should not have problems.
I suspect that you set the watchdog timeout to a very small value and the board resets constantly in short intervals. The setup menu warns about such a situation and advises to set a reasonably high value when trying to enable the watchdog.
At this point there is no other option as to order a SPI recovery dongle.