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Hot damn, times like this I wish 68kmla had its own little Kickstarter clone... it'd allow us folk without the technical chops to somehow chip in.

Others know the SE better than I do, but do you need to have a shunt installed on the 2/4M pins?

Ooh, yeah, +1 for soaking the boards in vinegar to neutralize the battery gunk, and cleaning the boards with water/IPA to see what damage the corrosion's done...

Ha! The idea of a completely non-Apple SE/30 is great. Let's keep our SE/30s running indefinitely... As part of the Classic II gang gang, though, I'm obliged to cast my vote for the Classic II... although it's got custom ASICs out the wazoo, so it'll be harder to do. Oh well, SE/30 it is.

Hot damn, talking about pushing compact Macs to the limit... I imagine you'd need the upgraded ROM to max out the RAM...

! is that running Mac OS 8? How'd you get that working? (A ROM swap maybe?)

Ooh, yes! DM'd – I have broken clips, and I'm not hopeful that using rubber bands are going to work in the long run.

God, yes... the entire Macintosh Classic/LC/IIsi wave of computers were built like tanks. I'm sure that the effort that Apple spent on getting the LC logic board as compact as possible went into the Classic and IIsi as well, which is what makes them so resilient.

Hot damn, those shadows really give off 80s vibes. 

Surely that would be to configure the ROM/FPU expansion card, no?

This worked! Extracting a new copy of A/UX Startup from the image on MG worked. Thanks for the pointer.

Here's a strange glitch I'm observing on my SE/30 – if you remove A/UX Startup from Startup Items, I can't run A/UX Startup manually – I get the following error: (It used to be 512k.) No editing of the minimum + preferred memory sizes fixes the problem. Has anyone seen this before?

I'm thinking that maybe installing the ROMinator II might have pushed some gunk into the slot? It can't hurt to use contact cleaner or something to clean out the slot and check.

In general, fscking large disks in older Unices with non-journaled filesystems is a PITA – every time you don't do a clean shutdown, lots of inodes get screwed up. I've ruined so many installations of OPENSTEP as well like that.

It looked like that was it – thanks so much for catching what I missed! I used a few rubber bands to apply pressure to the ROM SIMM like so for a quick fix:   Thanks @dochilli, @Daniël Oosterhuis as well for the leads – there actually did turn out to be a little gunk in the socket as well.

All – I'm genuinely flummoxed by this. Have any of y'all seen this happen before? I took a working, recapped SE/30 without a PRAM battery, installed a new PRAM battery off Amazon, and boom – simasimac on boot, no chime, even after waiting for RAM check to complete. Removed the PRAM battery, and...

Yes! A pinout for the hard drive port is available on pages 162-163 of http://www.maccaps.com/MacCaps/Repair_books_files/Mac Classic %26 SE Repair and Upgrade Secrets.pdf, and for the internal logic board connector at https://old.pinouts.ru/Power/macclassicpower_pinout.shtml (although I'm not...

Sign me up for a Linux version!

Ha! If this ever happens, I look forward to one-upping all of my friends with Amiga PPC accelerators with some casual web browsing  ;)

Wow, this is a beautiful log! I'm waiting to do a Classic -> Classic II board upgrade, so the recap guide is really gonna help. Did you ever figure out what the jumper wires were for – maybe broken traces?