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On the upside, if you ended up with two working, or at least non-bombed logic boards, it's still a win. Not the one you were looking for, but a win.

Was the board working before the recap? Have you checked for proper voltages at the floppy port?

I keep ChipQuik around as a standby, it does work well in many situations, you can buy a small kit from Amazon (link) for $11.95. Personally, I recommend picking up a hot air station, I bought mine from Amazon for $40 (link). I'm sure there are better ones out there, but this one has adjustable...

Amazing work, very impressive.

Eek... I stand corrected. 🤢

If you don't have a microscope I would recommend buying one, you can get a cheap electronic microscope from eBay for $50-100. I found mine extremely helpful in my troubleshooting projects. On the IIsi there are chips next to leaking caps that often have corroded traces or loose legs that you...

Have you checked voltages? This is easily done at the floppy port. I'm sure people with IIci specific knowledge will respond soon, however checking voltages is always a good place to start. Edit: Was the board working before the recap? Have you checked to make sure none of the caps were...

Doing some googling it looks like Evapo-Rust sells a rust remover product to soak the metal in, as well as a spray-on rust inhibitor. @croissantking, did you use the spray, or did you spray it with something else? I agree a plating shop would be the best solution, I would expect it to be a bit...

I am getting close to wrapping up my SE/30 reloaded build and finally removed the IO shield from the old board. It has a fair amount of surface corrosion. Does anyone have any thoughts on how to refinish it and keep it from further corroding? I thought about cleaning it (wire brush or sand...

Console5 lists the capacitors on the website (console5.com), he sells pre-packaged kits for about the same price if you were to order them yourself from Mouser or DigiKey. I bought my CC caps from him. As @Powerbook27364 said above, make sure you have the right equipment, all the things he...

I have a Sonnet Presto '040 accelerator in my CC, here is a link to my post which includes benchmarks. It benchmarks halfway between a stock CV and a Mystic, and about the same as a IIfx. It makes the machine very useable and no longer feels slow. Mine is not the Presto Plus with the on board...

The easiest thing would be to just put an old Mac Mini inside the case. Otherwise I think finding a working/fixable logic board and doing the ATX PSU upgrade makes sense. And yeah... That's the most trashed board I have seen. True carnage.

The pins on UE5 and UI6 are often suspect due to their proximity to the caps. I know you said you checked continuity, and yours look pretty clean on the photos, but it's probably worth reflowing the solder on those legs just to rule out a weak or intermittent connection.

Im pretty sure it has the same audio issues as most SE accelerators. I have never tested the floppy drive, I've only used with my Floppy Emu. I can test the audio and floppy drive this weekend. Unfortunately I don't have any way to test the serial ports. Since this is an exact clone of the...

I built a couple Performer '030 accelerator clones for a Plus/SE. The math benchmark was actually higher without the crystal (FPU running at the same 16mhz as the CPU) than it was with a 25mhz crystal. If you get around to doing that please post some benchmarks, I'm curious if it would make a...

Following with interest, while simultaneously having flashbacks of the IIsi board that kicked my butt.

Nice, I'm glad you were able to do that swap. Even though I will never do anything with that machine requiring a FPU, it's nice to know it's there. How hard was it to remove the CPU from the board? The only through-hole CPU I tried to remove was a '030, I gave up because there were some pins...

Which RAM SIMM sockets did you get from PE? I assume HWS5040? I need to step up and buy those, I've been putting it off since its $40 for 8, but I know I'll regret reusing the old plastic clip sockets down the road.