Quoted from MaxAsh:- Swapped in a spare System 6 MPU board I had around, same results
Quoted from MaxAsh:- Swapped in a spare, good Driver Board I had and powered up the game
Quoted from MaxAsh:Couldn't resist, tried my other driver board. No change, still not booting.
Quoted from MaxAsh:Swapped in spare Power Supply I had, no change
Considering you have swapped in a good CPU, Power board & 2 x driver boards it seems the problem may be elsewhere.
Sounds possibly like a short to ground with the CPU/Driver board? Worth checking the Metal tray the CPU sits in, that the CPU is actually sitting correctly in the tray to check their is not a short to ground there. Maybe insulate the tray it & reinstall to check
Had this happen to me years ago with my Gorgar, when I removed working boards to add a battery (rather 2 x supercaps) to the CPU & re-installing the boards (without screws just to quickly boot up & check) only to now have a short.
I did have a short from the CPU to the tray which caused all kinds of behaviour like this. I think either it had dropped down a bit when mounted without the screws installed or was not sitting in the tray. I reinstalled correctly sitting in the tray & screwed it back in & was all ok.
I remember reading recently someone else with a System 6 game that had this same short to the tray recently too - an overlooked possibility.
Newcastle, OK
