RE: C128 repair advice...

From: Bo Zimmerman (
Date: 2002-02-25 06:30:32

Well, thanks for the advice everyone.

Checking voltage and heat is easy enough, though I'll need to invest in an
Oscilloscope to check those RAM pins I suspect.  In particular, which are
the tranceiver chips though, and how should they be checked?

- Bo

> -----Original Message-----
> From:
> []On Behalf Of Richard Atkinson
> Sent: Sunday, February 24, 2002 4:42 PM
> To:
> Subject: Re: C128 repair advice...
> On Sun, 24 Feb 2002, Spiro Trikaliotis wrote:
> > Well, as the Z80 is the one which gains control after power-up, if it
> > failed, the C128 will not start up at all (blank screen). As
> this is exactly
> > your symptom and the Z80 is "hotter than normal", I would expect that to
> > be failed.
> Or something to do with the Z80, at least. Possibly one of the bus
> transceiver chips connected to the Z80 has failed, or even one of the
> inputs controlling it. That might cause it to do nasty things on the Z80's
> bus, which would in turn cause the Z80 to get hot.
> Richard
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