Dead Asteroids

I've just obtained an Asteroids that I knew was dead before I bought it. I thought at the time that it was just the main board, but now I'm not so sure ..........

Before I go on, I'll say that I'm a complete newbie at this. I've also done some research and can't find anything directly related to this particular fault.

Also, this is no 'ordinary' Asteroids, it was originally a Lunar Lander and the main PCB has been heavily modified to run Asteroids, said mod also includes a daughterboard.

When powering on the machine the monitor emits a fairly high pitched squeal, there is no display, also the player one button stays lit. If I disconnect the monitor then the player one button stays lit and pressing it doesn't achieve anything.

Could a dodgy main PCB cause the monitor to squeal in such a manner, or is this indicative of an additional fault in the monitor?

Should I wait and try a known working Asteroids board that I have on order, or look into seeing if there is a fault in the monitor circuitry?

Thanks,
Phil

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Received on Tue Dec 11 07:17:08 2001