Galaga 88 pcb repair needed

Shanerc1

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Who does Namco System 1 repairs? I have a dead Galaga 88 board in need of repair. I have swapped the rom board to a working cpu and it tested good.
 
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I have repaired some Namco System 1 boards in the past but I'm located in Europe.
Which are your issues?Is the board completely dead (back screen)?
 
I have repaired some Namco System 1 boards in the past but I'm located in Europe.
Which are your issues?Is the board completely dead (back screen)?

There is a hum coming from the audio but no video at all just a black screen. I have another working boardset. I swapped the boards around and the rom board works fine with the good cpu board.
 
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As I expected the problem is in the CPU board.Try to swap all the socketed chips with the one from the good CPU board.The black screen is because the system is halted.For first try to swap the three 6809 CPUs.
 
As I expected the problem is in the CPU board.Try to swap all the socketed chips with the one from the good CPU board.The black screen is because the system is halted.For first try to swap the three 6809 CPUs.

Thanks for the advice. I may just try and find some replacements instead of swapping them. I'm not comfortable putting my good ones in there. They seem to be getting hot and I don't want to screw up my good set.
 
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