Could some people give me their idea of the steps to take when
repairing a Digital system? Let's assume I don't have the schematic or
other paper on these boards. They are arcade game boards. On this one
particluar board I am working on it comes up with a work ram error. I
checked all of the RAMS and they check OK. What is the next step? Maybe
something with the address line? It is a system running on a 68000.
Also if I am checking pins on different chips with my scope what are
the levels that would point to a bad chip or node. Anything below .5
volts and above 4 volts? Still confused on this one,
Thanks
Uriah