My Dot Matrix Controller board in my BSD has a RAM error. I have the typical garbage bits on the DMD. If I run the display test I get a RAM Fail message. I left the machine on and the display cleared up and ran the test again and everything passed. 10 minutes later it went back to garbage. Is there a good way to test and know which RAM chip went bad. I've seen others mention one of the 74SL175N flip flop's go bad and replacing them fixed it.
Any ideas on how to track this down or should I just buy a new board?
thanks