bricked RX100-M3

[ferhai]

Weird misbehaviour after repair: I replaced the display cable on my cam and presumably because I touched the flash cap some discharge modified something. Since, the camera only works in video mode, all other modes are blocked (sometimes one single image is taken).
I tried different resets etc. without success.
Now I downloaded the camera firmware, unpacked it and saw, that config.yaml only contains:
dat: null
fdat: null

Any idea whether this is correct or a mistake? Or any other hints what to try or to modify? If it helps, I could attach Backup.bin, which seems to contain many parameters, but I neither know how to read it nor which values are correct (even with od -c I do not see any usefull info)

[ferhai]

Just to add: I hoped reinstalling the firmware might help, so I created a fake version (from 1.20) as 2.10 and installed that, but nothing changed.