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I can't say I've ever seen that before, but given the part number on the PCB and the quality of the wiring, I'd actually suspect this is a factory bodge.

Thanks, I'll let you know if I need it -- I've managed to secure a donor board, but I haven't received it so I don't know its condition quite yet.

Yeah, that was the main reason why I decided to recap the board...but those traces really all did look fine. This board definitely wasn't a battery bomb victim, and I'm starting to suspect its original factory caps hadn't really even started leaking. The known-good board from my other Color...

First thing that comes to mind is potentially a voltage issue. Perhaps try using the PSU from your known-good machine with the problematic board, if you haven't already?

I swapped the ROM chips with my known-good CC board, no change. The originals (and the ones I swapped in) were seated just like the ones in your photo.

So to be clear, by "grey screen" this is what I'm getting -- this is in a CC chassis with an analog board that I know needs to be recapped, and with a good board installed I still get flickering/changing levels of brightness. In its own chassis the display stays blank (but with a good board...

Got some time last night to try this out. I'm getting 4.85V from RST on both DFAC and CUDA (pins 24 and 15, respectively) when the machine is powered on. Nothing happens when I try an NMI though. EDIT: Forgot to mention that I tried swapping the ROM chips between the two boards, and that didn't...

I'm well-aware of Yahoo Auctions Japan, I've bought a *lot* from there over the years ;-) The difficulty is shipping -- if I were in Japan it would be a no-brainer to pick up what I need from there (or even just keep an eye on shops like Hard-Off) because domestic shipping is economical and very...

This is a very valid take on the situation, and I've definitely considered just turning this machine into a Mystic and being done with it. The problem for me is one of economics -- the Mystic mod seems to be even more popular now than it was when it was new, but the prices for LC 575s (or even...

The area around the DFAC looked clean, but I went ahead and desoldered it to clean underneath anyway. I soldered it back down and unfortunately I'm still getting the same results. I've started testing for connectivity from both DFAC and CUDA, but the Bomarc schematics suggest there's only two...

Well, I removed the EGRET chip and found some electrolyte residue underneath but no trace damage. Got it cleaned up and resoldered the same EGRET back on, but no dice -- the problem persists. I'm not willing to swap the EGRET from my working board, so I'll need to find a donor or see if UTsource...

At that price, I'd be in for one!

I'm picking up a project I've been sitting on for some time. I have a Color Classic that doesn't want to boot. When I press the power key, the light will come on and the hard drive/fan will spin up, but there's no chime or image on the CRT. It's definitely not trying to boot because I'm not...

I suspect there were multiple manufacturers for HDI-30 ports and plugs over the years. I found some reference to Hosiden manufacturing them, though they (perhaps unsurprisingly) don't seem to any more. (Fun fact: it looks like IBM used it on one of its portable PS/2 models!) I've found that...

For clarity, this 50MHz card was advertised as being *faster* than a IIfx, which was 40MHz. Given that the IIfx was likely better optimized for speed than the IIci was, I'd expect the two to maybe be similar in benchmarks, and interestingly their FPU results are indeed very close. But the CPU...

I'm running Speedometer 4.0.2. I might try upgrading to System 7.1 next, to see if that makes a difference. Also of note is that the machine has a BlueSCSI v1 installed, but I'd be surprised if that was a factor.

I'm testing out a DayStar Universal PowerCache card in my IIci. It's the 50MHz 68030 version, so it *should* be wicked fast. And it's certainly faster than the IIci in stock form, but the benchmarks suggest it's not performing as it should. The IIci has 20MB of RAM and is running System 7.0.1...

The brand is ORICO, here's the link to that specific deal: https://www.newegg.com/orico-m200-128gb/p/2CR-000K-00004?Item=9SIA1DS9WA5540 I've used ORICO-branded drive enclosures before and they've been fine, but I had no idea they were in the SSD business. For the price it's probably worth the...

Yes! Looks like you went without the frame entirely, and I'm noticing now that you also removed the housing for the PSU...this gives me ideas :unsure:

At some point in the past I ran across a photo of someone with a clear MacEffects SE case, who had trimmed the metal chassis to offer a better view of the internal components. Anyone know who this was?