Hi Guys,
I have purchased a Sony HB-G900D and it was sold defective but turns out the machine itself seems to work but I get no video output from the start connector. If I put e.g. Nemesis 3 in slot 1 or 2 I can here the game is running (the demo sounds start playing) but just no display. Also floppy disk is working and all keys on the keyboard give a keyclick (some need some convincing so the keyboard probably needs cleaning). I assume the VDP is working (otherwise the game would not run I think), so my guess is the genlocker part is defective as I suppose these machines are should work fine without the Videotizer module (it is marked optional in the Wiki), but I am not sure. I've tried all 4 combinations of the rear switches (PVM/PERI-TV and INTERLACED/NON-INTERLACED).
Any info on what could be going on is appreciated.


at the same time I’ll change the main ROM so I don’t have to remember where all the special characters are