Sick C-64c

From: Bill Girnius <thedm_at_sunflower.com>
Date: Mon Sep 8 08:44:32 1997

The floppy drive incidently, works on other c64's just fine, and I have
cleaned and calibrated it.

----------
> From: jpero_at_mail.cgo.wave.ca
> To: Discussion re-collecting of classic computers
<classiccmp_at_u.washington.edu>
> Subject: Re: Sick C-64c
> Date: Monday, September 08, 1997 4:38 AM
>
> > Date: Mon, 8 Sep 1997 08:22:06 -0500
> > Reply-to: classiccmp_at_u.washington.edu
> > From: "Bill Girnius" <thedm_at_sunflower.com>
> > To: "Discussion re-collecting of classic computers"
<classiccmp_at_u.washington.edu>
> > Subject: Sick C-64c
> > X-To: "Classic" <classiccmp_at_u.washington.edu>
>
> > I recently aquired a stack of c64's, these are the old brown type. Of
(4),
> > One works fine, 1 boots, and can run catridges, initializes the floppy
on
> > boot, but can never access it after boot, the other two have power but
no
> > video. Any ideas on these folks?
>
> Checkerboard or no display usually means memory is bad, replace all
> 64k ram chips.
>
> Oddball problems usually traced to the VIA ic's blown by unbuffered
> lines. Real easy to do to blow it if careless!
>
> Make sure you put the shield back on with those finger "pads" coated
> with bit of heatsink paste on them, they're like poorman's heatsinks!
> The video IC get brutally hot!
>
> Monitor the voltages for stablity and good idea to replace those big
> capacitors just in case. The floppy drives I think is belt driven
> type and needs bit of cleaning. I had a problem with one, inside
> that small can there's 2mhz crystal and one TTL chip, That TTL chip
> was baddie.
>
> Jason D.
Received on Mon Sep 08 1997 - 08:44:32 BST