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One more thing. Make sure the contacts in the audio jack are working. There are slider contacts inside the switch ( you need to remove the switch to get to them ). Those contacts can get gummed up and if they are not working, you have no audio. Try it with something plugged into the jack and...

Check it with a meter. That's the best bet.

For something like this, I normally remove the chips in question, clean the pads, then take a meter and check from pad to via, or from pad to destination pad of another chip. I find that it's pretty common to have a hair line crack right between the pad and the trace. Often they are small...

I thought of that too. You can buy blank keys and they are pretty standard locks. The thing that strikes me most about these is that you can remove the outer ring, then design and 3d print a new one that would fit Quadra series machines. As for wiring, that's pretty basic. If anyone wants...

Out of 6 locks, 2 of their keys worked on my Quadra 950, one was slightly better than the other. So, that gives you a little over 66% against the keys working on your computer if the lock numbers don't match. Sample size is small, so who knows the actual odds. As for re-keying: Here's what I...

I have a contribution to your project: I just bought 6 sets of NOS locks and keys on eBay for the ANS for $6.95 ea + $5.95 shipping and whatever random tax eBay tacks on. One has your name on it. - My cost exactly plus how ever you want it shipped. Also, there should be a key number on the...

I snagged all of them. I'll have extras, but my goal is to rebuild a Quadra 950 lock which is missing they key since these use the same keyways. https://www.ebay.com/itm/297309508268 I'll have extras and you know how much I paid, so if anyone wants one, send me a message. I should have them...

Odd. Ok, I tried it on my mac and it failed. Might have been zip doing it instead of Stuffit. I'll have to beat on it and see if I can replicate the error. That way I'll know what not to do at least.

Odd. I created the archive on a Quadra 950 with System 7.5.3. If it gets extracted on a modern system, it will strip the resource forks from some of the files and make it unable to compile. Not that it matters, I don't expect other people to compile and run it since I just posted it for...

I just released the source to the AMUG Internet Installer (ca 1995) via Macintosh Garden. https://macintoshgarden.org/apps/amug-internet-installer MIT License. Have fun! (Also attached here for archival sake)

So, not wanting to wait for Mouser to catch up and process my order after the storm, I dug through my cap pile and found two Nichicon VX(M) 1000uf 16v general purpose caps. Those are EOL, but they were close enough for now. I pulled and tested ESR and Capacitance of all the caps on the input...

Let's wait on Mouser. I'd like to test them before I pass the list along. I found this older list after I ordered mine: https://www.digikey.com/en/mylists/list/TMYLHKE4FN

Taking it apart for the first time was a bit complex. It was also pretty dirty, so cleaning it and decontaminating the input board took a little while. The longest part was figuring out appropriate replacements for the caps that were in it. At this point, I am waiting on new caps from Mouser...

Quadra 950 Power Supply, Input Board: This one had two leaking caps. Unfortunately, Delta populated C905A and C905B with 16 V, 1000 µF Rubycon VXB electrolytics, a series so prone to leakage that Rubycon later advised manufacturers to stop using remaining stock. As for this board, I pulled all...

Nice! I have a Iisi board that has a bad serial ports and I don't have a replacement 85C80, but I do have a few SIMMS I can borrow the chips from. I might just have to give it a try.

Interesting. This is a prototype and has some programmable logic on it that's probably a different from the final release.

Here's the second one (Prototype Quadra 700)

Here's one from a Prototype Quadra 700:

I have a prototype Quadra 700 and a release version. If you'd like, I can run it on both systems.