Diagnosing screen artifacts

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CWJ_Wilko's picture
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Joined: Jun 3 2015
Posts: 272

You occasionally see a 'for parts' Apple ][ on eBay or other sites that is throwing up some garbage characters or graphics onto the screen. Is there a page or document that categorises these artifacts into possible points of failure? My machines are working at the moment but I feel like a handy reference guide could save me some trouble in the future.

I don't recall seeing anything like this in the Technical Reference Manual or elsewhere, but apologies if it's in an obvious place.

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6502enhanced's picture
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Joined: Feb 23 2006
Posts: 243
Re: Diagnosing screen artifacts

Well, this might not exactly be what you are searching for, but it helped me a lot!

http://www.appleii-box.de/H198HomeRepairGuide.htm

CWJ_Wilko's picture
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Joined: Jun 3 2015
Posts: 272
Re: Diagnosing screen artifacts

That looks pretty handy, thanks. Now I recall that there are several books from the 1980s about Apple II home repair, which might be useful compilations. I just assumed there would be a more complete guide out there on the Internet now, but I suspect it's more of a case-by-case diagnosis these days.