Re: C64 --8032 monitor questions

From: Marko Mäkelä (
Date: 1999-07-23 09:28:09

Hello Brandon,

On Thu, 22 Jul 1999, Brandon Wolfe wrote:

> The university here apparently had more commodores than they knew what to
> do with, so I took one off their hands and set to taking it apart and
> putting it back together again. Everything seems to work ok, at least the
> short distance I can tell: the monitor is not working. It makes a pleasant
> beep when I turn it on and the monitor acts as though it wants to work,
> turns red and buzzes, but no incandesant green. Is it the tube's fault? How
> could I fix it? And is it likely that a second PET might supply the needed
> parts (apparently limitless supplies here.)
> Secondly, before I cannibalize any more computers, are these things worth
> anything? 
> -Brandon

I'm sending a copy of this message to the cbm-hackers mailing list,
because there are a lot of Commodore PET users listening there.  Yes, the
monitor probably is at fault.  You can ensure this by measuring the video
signal from the wire that runs into the monitor, e.g. by using an
oscilloscope or by connecting it to another monitor.  I'm not sure, but I
think that the signal should be compatible with video monitors.

As far as I remember, the schematic diagrams at do not cover the monitor, but they
could be otherwise helpful.

What are vintage computers worth?  A good question.  I got my 8032-SK for
almost free: only 20 FIM (about 4 USD).  But the computer certainly is
worth way more than that for me.


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