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From: reynolds@felix.UUCP (David Lee Reynolds)
Newsgroups: comp.sys.cbm
Subject: Re: My C64 is dead
Message-ID: <151154@felix.UUCP>
Date: 13 Sep 90 15:05:14 GMT
References: <1990Sep10.144605.16326@jarvis.csri.toronto.edu>
Reply-To: reynolds@felix.UUCP (David Lee Reynolds)
Organization: FileNet Corp., Costa Mesa, CA
Lines: 30

In article <1990Sep10.144605.16326@jarvis.csri.toronto.edu> ghfeil@white.toronto.edu (Georg Feil) writes:
>In its last moments of life, the machine started randomly accessing the
>early portions of screen memory, and the foreground colors were alternating
>rapidly. There were most likely other affected memory areas, but these were
>obviously not visible. After about 5 seconds of this, the machine crashed.
>I cycled the power, and it rebooted (made it to startup screen) but the 
>foreground colors were still going wild. It crashed again almost immediately. 
>Future attempts to restart were not successful (screen stayed black).
>
>Any ideas out there?

	In the past I worked as a repair rep for a local Commodore repair depot.
If I were the one to work on this unit the first thing I would try is the PLA
(Programable Logic Array).  This one chip controls ALL memory and display 
accesses.  The odds are great that this is the culprit.  I would go as far to 
say that out of every 10 C-64's I fixed 9 had this chip bad.

	They can be purchased from many sources for about $10 to $15 bucks.  If
you need a source just email me.  

	If you have a friend with a C-64, you might want to swap these parts
first, (the PLA's are almost always socketed), to verify that it will fix it!

>Thanks,
>Georg.
>--

	Good Luck!
				David Lee Reynolds
				(legs,spsd,zardoz,hplabs)!felix!reynolds