[vcf-midatlantic] Can someone diagnose a Vic20 Saturday morning?

[Jeff S]

I will be manning a table at the Swapmeet Saturday until 2PM, so I won't be
able to focus my full attention on your VIC-20 until I get back to the
Workshop. If you want to stop by my table in the 9032A building, I might be
able to do a quick check of the system. I will have my VIC-20 diagnostic
cartridge on hand.

I did learn recently, much to my amazement, that a "black screen" VIC-20
that appears to have measurable logic activity, could still have a bad 6502
CPU. I witnessed this myself after swapping one out in a VIC-20 recently
and it fired up just fine.

Jeff Salzman

On Tue, Feb 22, 2022 at 7:34 AM Eric Rangell via vcf-midatlantic <
vcf-midatlantic at lists.vcfed.org> wrote:

> Hi all,
> I have a Vic20 that the seller told me was rescued from the garbage.
> Looking at it I found 2 issues - photos here:
> https://twitter.com/RatifyArticle1/status/1495851785885560841 <
> https://twitter.com/RatifyArticle1/status/1495851785885560841>
> It still doesn’t have video when turned on.  I have a list of the chips to
> check - they are all receiving power.
> Let me know if anyone will be available to take a look at it and try to
> diagnose the problem in the CDL sometime between 7am and 1pm Saturday.
> Thanks, Eric
>
>