Galaxian problem - loud hum and wobbling picture

Vectorman

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Working with a guy I sold a Galaxian to over in England. Here's what he says...

"There's a loud hum through the speaker and the screen is wobbling. The game is on and it plays fine with all sounds. Have tried all monitor adjustments so its not that. Any ideas?"

I told him to replace the fuse holders, check the connections to the board, check the connections between the fuse holders and the edge connector, and replace the caps on the board. He said he has done all that to no avail.

Any ideas? I'm no Galaxian expert.

John
 
Hum and wiggly screen?

It's usually bad caps or crappy fuse holders.

If that's not it then check for burnt edge connectors/sockets where the wiring harness plugs in.

If that's not it, disconnect the marquee light and see if it all goes away.
 
Hum and wiggly screen?

It's usually bad caps or crappy fuse holders.

If that's not it then check for burnt edge connectors/sockets where the wiring harness plugs in.

If that's not it, disconnect the marquee light and see if it all goes away.

Tried the first couple things...I'll have him check the marquee light...thanks!
John
 
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