My Galaxian is flashing 2 screen one just has junk on it and then if flashes to a black screen with BBDDRRMM on it. The 2 screen just swithch back and forth. Any ideas what to check?
Usually something to do either with program but most often power. Feel around for hot chips; I find that a shorted chip will usually cause screen to flash, but not usually like that (from one to another). Worth checking though.
Thats the self test trying to report either a bad ram or bad rom. I would start by verifying the program roms, check their sockets and the sockets for the rom board.