Vintage Synth Repair

Was curiouse if anyone can offer help. I bought a dead P10 no lights 
or anything. The processor is good. I put logic analyzer on decoder 
output and see ROM1 (Y0) and RAM (Y5)(which I believe is the scratch 
pad memory)active at start up. All address buses and Data buses are 
active. I am not certain the algorithm. A flow chart would be nice or 
some help with what I should see at some critical points. I am 
wondering if there is a chance the ROMs lost programming and how would 
I know. Even if they did shouldn't lights and/or display come on. And 
yes the power supplies are good.