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Is the PRAM battery the same Panasonic rechargeable thing as in the 1xx series ?

Holly shit. Hope this get somewhere. Nice work. Is there a ROM dump somewhere so we can compare with @bigmessowires ROM disassembly ?

Ha, not sure if you want/can cancel the order and wait for the next PCB revision (the one with selectable ESC+DEL and PGUP+PGDN) block. Although knowing my todo list, there may be a "few" weeks of delays :)

That's not how it works :LOL: . I always give my remaining PCBs, so sure for one PCB it's expensive but still less than building more keyboards :)

Does the PSU stay on by itself ? (No load / no logic board / nothing) The other thing to try is to force the PSU on, and see if the Mac keeps running. That may be a fault on the 7100 side (either soft power, or a short, or something). BTW the caps on theses are just falling as bad as 68k ones

Missed that, amazing job!

As @Tashtari said, we don't mind as long as the license is respected. It's nice that you had fun with this, also nice soldering skills! That's exactly the way :)

I tried that unfortunately it doesn't work. While replacing the footprints and rerouting would only take a few hours, the issue is that ALPS switches are rectangle and slightly bigger than cherry switches, so they will not clear the plate They require a PCB mount keyboard or a dedicated ALPS plate.

Damn, sorry forgot about that damn plate :oops: It seems there is still a way. We got lucky with the traces, so remove only PGUP+PGDN switches and cut the top traces from there, then add one wire to fix Y7 (return / backspace). Here is a schematic for you As for DEL, it's X14 and Y6 - X14 is...

Well it's just a matter of wiring the switch where it's supposed to be in the keyboard matrix. On the Design68, the X pin is the "top right" on a switch, Y being the bottom left. (As seen from above the keyboard) For ESC you do need a switch between X17 and Y2. - X17 available keys are TAB and...

That's a good question. Are you willing to cut traces and use a couple of bodge wires to the controller pins ? (It's possible to use an extra switch for testing before messing with the PCB)

Nice job :) Liking the SCA HDD! Looks like an onboard switch bottom left. I'm assuming that's for switching between the LC Ethernet and the BMC ? Power Supply on the LC board looks bluetooth tho ?

finally got the "fun" Keycaps I wanted for my build (Keychron hacker PBT set)

Damn that's interesting! I only had logic board failures (but that was a decade ago). Does the power supply power up by itself if you trickle it ? (when the caps are dead)

Sounds like logic board / processor. Most of them die like this nowadays. You gave it a good life.

If you want something out of Digikey / Mouser, look for Aries 128-PGM13039-10. They are not cheap either. As @croissantking said, CPU insertion / removal will be harder but it's decent enough with the Aries (if the CPU pins are clean)

Should work fine

It's rechargeable. Panasonic VL2330-1HFE is a compatible replacement IIRC. I'm waiting for mine to test that