Subj : Re: Advice on the best drive emulator?
To : phigan
From : Kenzo
Date : Fri May 13 2022 07:06 am
On Friday, May 13, 2022 at 4:52:29 AM UTC-7, phigan wrote:
> On 2022-05-08, Kenzo <
[email protected]> wrote:
> > Thanks, I ordered a zoomfloppy today.
> I'm really liking this thread.
>
> Just wanted to chime in that I too have a C64 that powers on with just a
> black screen. I tried changing out the VIC and that made no difference.
> Even tested the original as well as relacement VICs in a known good
> system, and they both work fine. The first suggestion I got was to try
> replacing the PLA, which I did, and also made no difference (also tested
> that in the known good system). I don't _see_ any issues with any of the
> caps on the board, but that doesn't necessarily mean there aren't any.
>
> I'd be very interested to hear what's causing yours to do the same if
> you should find out :).
>
> Jelly of your C= collection! Never had a 128.
One book I have says a bad 6502 can also cause a black screen. I guess the moral of your story is you really have to troubleshoot electrically, just replacing arbitrary chips is not guaranteed to solve the problem. I have the documentation and
equipment so I will be doing that soon and will update progress here.
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