Picked up a Dreamcast V1 in very poor condition. On opening it found ribbon connector to controller board was missing. It doesn't boot up (no screen), drive inop) and wondering if I can rule that the motherboard is dead now, or need to wait until the replacement ribbon cable comes in to connect that for further testing.
Power supply voltages checked out, but unit had been previously pulled apart (missing screws, etc) and the motherboard was covering in residue... looks like tin fouling. I cleaned the motherboard with alcohol, hooked up power supply and drive, and powered up. Drive didn't spin, blank screen. Any thoughts appreciated.