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I bought a Mac IIsi for repair from the web (thrift store site). Under $100 including tax and shipping. It arrived quickly was very well packaged. It was in reasonable cosmetic condition. The logic board was in good shape. The PRAM battery was dead but intact. There were typical signs of SMD cap...

ChatGPT-4o is pretty impressive at identifying stuff from photos. So I threw it this: and asked "identify this computer". it confidently replied: Some details are correct .. but no. More training need.

I'd brought an SE/30 back from the dead: replaced the vacuum-less CRT and assorted video components, recapped, added 64MB RAM, installed 32-bit ROM and BlueSCSI. It now runs MacOS7.6, A/UX, and NetBSD-3. Nice machine, but only serial networking. TCP/IP over LocalTalk is possible but it’s slow...

So I picked up an LCIII for repair. The TDK PSU was toast - caps are good but the optocoupler is open-circuit and I'm awaiting a replacement. So I bodged into service a spare Astec Beige G3 PSU and the machine booted-up fine on its aged caps. I quickly recapped with tantalums (as you do) but...

I’ve used a couple of the Rev G version of these NICs in Mac IIcx and IIci, and I’ve always have trouble with RJ-45 10Base-T. Operating through an external AUI transceiver is fine but direct RJ-45 connection mostly fails. People have reported these NICs don’t sync with modern 100/1000 switches...

I'm restoring an SE/30. The logic board needs recapping but the analog board and PSU are in pristine condition. So while I'm working on the logic board, is there a way of testing the video generation without the logic board being connected? Can the video signals be fudged to display a blank...