help diagnosing a 'willow' cabinet

bolton

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Hello, I'm new here, just inherited a willow cabinet.

I was wondering if anyone here could help me diagnose what is going on with it.

When I power the unit on, the lights turn on (coin-slot light, and lights near joystick) and the monitor turns on but only displays white. I can also hear the faint sound of a fan running. There is no sign of the game itself loading. I don't have the first clue as to what to do next, I know very little of coin-ops so I was wondering if anyone could provide a diagnosis or any 'next-steps' I can take to further figure this out. I want to fix this baby!

Also, could anyone suggest a repair shop in the SF Bay area that I could maybe take it to?

thanks
 

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update: I swapped the Willow PCB into another machine and it works fine. So I know its not the PCB.
 
It's probably the power supply. If you could test the voltages coming from that, I am pretty sure you will find a missing voltage. If this is the problem, the power supplies can be 15-20 bucks for a new one.
 
thanks. I will see about getting the voltage checked from the PSU.
 
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