Williams Flash dead... after blown circuit breaker.

JuanUp

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Williams Flash dead... after blown circuit breaker.

Yep. Dead. Replaced all the ROMs afterwards. Clock pulses. Data and address lines are active. Though the driver board enable pin is set to low. Thought I'd throw this out here and see if anyone had a similar experience before I start servicing it.

Thanks,
Juan
 
Are you saying it blew a fuse or the actual circuit breaker in your house?

If its a fuse, which one.

If it was the circuit breaker, you have a dead short in the main line. Look at the silver box in the cabinet and I bet you will find a fried MOV.
 
Thanks for the reply. It was the circuit breaker in the room that blew not the fuse in the game. Switched it back on and the game freezes up now. Sorry for the confusion.

It powers up but doesn't display anything, no coin up, no diagnostics. Light flashes in corner of the back box. Voltages are good. Clock pulses. Data going in and out of CPU. Coils work. However, the driver board enable pin is low. Something blew on the driver board?

I thought that someone might of had a similar experience with this and had some insight.

Thanks,
Juan
 
OK. After some poking and prodding, looks like both flipper solenoids are shot. Drivers might be dead, too. Do these System 3 - 7 boards freeze up when that happens or should I continue probing?

Thanks.
 
OK. After some poking and prodding, looks like both flipper solenoids are shot. Drivers might be dead, too. Do these System 3 - 7 boards freeze up when that happens or should I continue probing?

Thanks.

generally, any dead PIA chip on a System 4 or System 6 will cause the game to lock up totally. As will a long list of things.

Pull the driver board and power it up, while watching the LED's on the CPU board. If they just come on, and stay on, it's the CPU board. If they blink once, then turn on, it's the driver board.

-Hans
 
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