super cobra

beeman8

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hi i have a super cobra pcb i am trying to get working i ve checked all the chips rams rom they all seem to be okay what am i missing i checked for brocken traces i see none broke here is a few pictures of what it is doing this one has me head scratching
 

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I would be looking in the gfx ram area. To me looks like TTL based issue but hard to tell without seeing the PCB in front of me.

When you say you have tested the roms/rams did you do a rom id on them and also how did you test/check rams?
 
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