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yellowdog & dokert offer repairs to these at reasonable rates.
i would say rebuild the original power supply - that way you wont have the monitor hum issue to contend with at the same time.
Post a pic of the power supply - i have a vague recollection that joust2 uses the same type of power supply as the earlier games, if that is the case for sure then bob roberts has a rebuild kit for the williams power supplies
are they offering their repair service across the atlantic as well?![]()
are there any write-ups on original williams power supply repairs and repair kits available for them?
Sounds like you do not have the switcher hooked up correctly. Solid gray screen is usually bad or missing +5vdc to the cpu. Test the +5vdc at 1J1 on the cpu.
You shouldn't have started to install this without have a working DVM......
I can almost guarantee that it's 110V.
ALL (yes ALL) the arcade machines I've seen here so far run 110V monitors (unless they hacked in a European SCART TV-set).
There was no reason for the manufacturers to switch to a different kind of power supply for the monitors. They only had to use a transformer that had primary windings for all world-wide available voltages, like Atari did.
I know many games for the US market only had 110V primary connections, but any stuff that was originally exported to Europe did have a set-up like this. This way the manufacturers didn't have to switch monitor type for the Euro (or other parts of the world) markets.
Even the machines that were built here work like this, Even the Euro-Joust that I have that use a Hantarex monitor still runs on 110V. Centi, SW, Galaxian, Puckman, Asterock, all of them...