Re: PET/CBM Repair

From: William Levak (wlevak_at_cyberspace.org)
Date: 1999-09-17 05:24:08

On Thu, 16 Sep 1999, Mike Naberezny wrote:

> 
> Hi All,
> 
> I picked up a dead 8032 I'd like to get going.  I only looked at it for a
> minute or two, but here's what I found.  When switched on, the unit does
> absolutely nothing.  The monitor and power supply are good, they work when
> another 8032 board is put in the case.  The problematic 8032 board does
> have strong 5V to all the chips, but other than that I haven't done any
> testing.  What do you suggest I check first?  What are common problems
> with these machines?

If it didn't beep then it has not initialized.  Check the reset on the
6502 and the F000 and E000 ROM's at UD6 and UD7.

If it did beep, then check for output on the video connector with an
oscilloscope.

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