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Haha. my problem is not "I need a working VIC-20". I have close to a hundred VICs and most of them work. My specific problem is, the 2-prong units used a power switch that freezes in place after long disuse, and they are really hard to unstick. I have quite a few of them that have been broken in...

O.M.absoluteF.G. That is perfection and you have won three internets today. And I even have a resin printer :) (it's currently printing me a couple of transparent Apple II mice but it'll free up :)). Now for your next trick you'll tell me where to source a VIC-20 (2-prong) power switch ;) - it...

Remember how I said I almost never have problems with a Plus... :) I pulled this one at random because it was the closest thing in my garage I could use to check what's on a 400K floppy someone sent me. Right off I noticed it had an unusual amount of battery corrosion. I rarely see much damage...

Ah well, it's okay as a project machine (I probably have 10 such project machines - Classic/Classic II were never my thing - but this one is the cleanest). I'll nibble through it and see if I can get it working, especially since I have so many donors that could supply an organ or two. The analog...

BTW I should have stated - we had 256K SIMMs that would work happily as 4x256K, and 1MB SIMMs that would work happily as 4x1MB, but split those same modules up and do two and two and the machine either didn't boot at all or was unstable. I miss those times. Not.

Well, it probably is a lot less problematic now when 30-pin RAM is all salvage and you can find anything you want for tinybucks. But back in 1987 when our school lab was upgrading the 1MB Pluses, someone said "we can save money by only going to 2.5 instead of 4" and it was really an issue (for...

And when I bought it it already had notes on it about what it did on powerup, so after I cleaned the digital board with IPA and deoxit'd the sockets, I had very little, if anything, to lose by applying power.

Given the sources of these machines, it has already been done by hopeful sellers before me. And I rarely experience issues with the SEs and Pluses apart from the usual solder joint issues.

Because I am lazy. I am well, well aware that every single Classic and Classic II I've powered up in the last several years has required at minimum digital board recapping. But I live in eternal hope. And, like I said, I'm lazy.

Thanks! It's been a long time for me :) Sigh. Guess I need to really get into troubleshooting this machine rather than phoning it in.

It is a long time since I've actually used a _working_ Mac Classic (I'm a Plus/SE guy), but I'm trying to see if I can get one of mine operational. This one has no visible electrolyte leakage, solder joints look good, and the battery was deleted long before it could cause any problems. Very...

Judging from the date on it, someone reverse-engineered it. Nice.

The Mac SE has a 16-bit bus and you can use 2 SIMMs at a time for configurations of 1MB (4x256K), 2.5MB (2x1MB+2x256K, weird combo and not recommended) or 4MB (4x1MB). The SE/30 has a 32-bit bus and requires SIMMs to be installed in matching groups of 4 (8 slots, max official capacity 8MB with...