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Oh duh... forgot about the key switch... need to check if that's why the ADB port isn't responding... EDIT: yup, it was the key.. ADB is fine. Cool.

Received that Corsair HX1200 PSU and temporarily connected it to the Quadra 950 logic board via a breakout board. Yup, the PSU was dead. The logic board chimes and is booting. The only issue is the ADB port doesn't work. Tried a couple mice, tried a couple keyboards, nothing. Nothing visually...

Thanks, and now I know who to ask for advice :)

Oh neat!! Thank you!

Corsair HX1200 (not the HX1200i which only does 25A). It’s discontinued but you can get them used around $40-$60.

Yeah, saw a bunch of threads mentioning this. I am not going to bother trying to get the PSU working. I found a modern PSU that has independent regulation of every power rail and puts out 30A for 5V. Picking one up used in a few days so will see if that will work as a replacement.

Neo Geo, super cool! :)

Not Macintosh related... but I've been distracted working on a project with my kid to build a full arcade cabinet for the Japanese version of Capcom's Street Fighter Alpha 3 (Zero 3). We've finally collected everything we need including power supply, 4:3 20" LCD monitor (wish we could find...

For the Quadra 950, it looks like something's wrong with the PSU. No power coming out of it. I don't see anything on the 5V trickle either. The metal shielding has some corrosion/rust on it but nothing too crazy. Tested the fuse and that's ok. The primary side looks ok as I see reasonable...

RIP Louie. ☹️

Next project.... dead Quadra 950. Just arrived and haven't tried anything yet. Broken plastic tabs everywhere. There is some corrosion on the metal but not bad. Logic board looks ok and doesn't seem to have any obvious damage.

Depends on what you mean by “classic Mac OS”. If you intend to support System 7 for example, any solution that does not adequately give up control (due to cooperative multitasking) will “freeze” the system until parsing is complete, as @Snial alluded to. Small snippets might be fine but anything...

The artifacts seem normal. As for the dimming, I need to check my 160 when I get home but from my memory, there was “some” dimming but not much in terms of a smooth adjustment of varying brightness. It was off, one or two mid levels, and then full on if I remember correctly. But I thought there...

Almost looks like that SE/30 was stored upside down and the battery leaked onto the chassis instead of spilling all over the board.

Cool!!

Reminds me of the clear pager cases in the 80s. Neat!

I will concur with what @finkmac said. My display looked the same with no image until recapped. It’s a passive matrix screen so you will see some patchiness as well as what look like artifacts which are in fact just part of the passive matrix experience.

I also have found Claude to be more interesting. These shared answers are not exactly the same as what I saw a while back but clearly provide a hint or general direction which is helpful. The point was many of these already have access to Inside Macintosh and tech notes.

I've tried a few prompts in the past using ChatGPT and it was providing detailed information from various Inside Macintosh volumes as well as Apple technical notes without any sourcing of content from me. For example, I had asked a question about how to add custom vars to a parameter block...

I have not experienced your issue. My 280c works fine with external ADB keyboards/mice through both the duo dock and the mini duo dock. Given you mentioned you have been able to power other devices through that port just fine, that would probably rule out 2 of the 4 pins (VCC/GND) and for your...