Spot killer not working on G05-802

joetechbob

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I'd picked up a pretty beat up--and non-working--Asteroids cocktail about a week ago.

One thing I noticed when I first went to look at the game was that the spot killer didn't seem to be kicking in--there was a faint dot in the very middle of the screen.

Fast forward a week (after general clean-up and game board repair) and I've still got the spot killer light on--I'm missing vertical deflection--but the monitor is still drawing a horizontal line.

Given that, I have a couple of questions/clarifications:

1) I'm assuming it will be fine to debug the monitor with the spot killer not working as-long-as I turn the brightness down. Is that correct? Any chance of hurting any circuitry due to a missing load, etc.?

2) In your past experiences, what's the most likely culprit for not having the spot killer actually work, despite the LED turning on? Bad transistor?

Note: I haven't installed a cap kit or done any general repair work...Wanted to dot my i's and cross my t's on the spot killer before I unnecessarily fried something.
 
Well, I got vertical deflection going--ended up just being some bad solder joints on the headers and one blown fuse. I guess I'll find out if there's something else behind the blown fuse :)

I'll circle back on the spot killer and update the thread next chance I get.
 
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