Williams Black Knight (Williams, 1980) display problem

[DBOX]

I have a Black Knight and turned it on yesterday after about 4 weeks of no use and there was no display. The display did come back after it was on for about 30 minutes.

After I was done playing I turned it back off. Came back later, turned it on and no display again. This time the display didn't come back at all.

I tried reseating the connectors to the master display driver but no luck.

Anyone have any ideas on other things to try or point me in the right direction? I'd appreciate any help.

Thank you

 

[spalmer]

Sounds to me like a problem with the High Voltage side of your power supply. They have a tendancy to go bad. Check for voltages at conector 3j5 on the power supply.
I will bet you are missing your 100 volt. If that is the case I will tell you what components to replace to rebuild it.


Power Supply 3J5 pin 1: Logic Ground.
Power Supply 3J5 pin 3: -100 volts DC.
Power Supply 3J5 pin 4: 100 volts DC.
Power Supply 3J5 pin 5: High Voltage ground.
Power Supply 3J5 pin 6: +5 volts DC.