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@This Does Not Compute during your vid there’s a shot of the caps removed where the traces underneath look okay at a glance. It made me think to ask if you inspected all of the traces running underneath the replaced caps carefully. Perhaps one is open or short causing your problem.

Same ones. Didn't realize they were in your repo.

I redrew the logos too in case you want to make a sticker for some reason. My kerning is probably still a bit off, but it's pretty close. The zip contains SVGs.

Modem: 16mm wide ✕ 22mm high. Bottom of cutout is 9.5mm from bottom of door. Power: 14mm wide ✕ 16mm high. Bottom of cutout is 6.5mm from bottom of door.

Here's the photo I posted to discord for reference.

I’ll give the dead chip to someone who can/will decap it and scan the die if that’s helpful. Otherwise will be keeping the bad card for parts.

I swapped in the Gemini from the bad card to the good card. The good card with the bad Gemini failed in the exact same way. So somehow the chip died.

The traces are okay. There was just some crud in that area that needed cleaning. Will try the GEMINI from the bad card on the good card to see if that gunk was the problem or the chip itself is bad.

I swap tested parts from the known-good card. Swapping in the GEMINI from the good card to the 'bad' card resolved the problem. Start-up diags pass and loops work. I'm running some extended APPLE-CILLIN diags on it now. There was some crap under one corner of the GEMINI. Just to be thorough I'm...

Another data point, I ran the ROM self-test by holding ⌘+⌥ during IIe startup. It gets through most of it, including 80 col for a while but eventually crashes just like the loop. Any insight based on where it crashes here? Also, I'm using it in a Color Classic here, but it has the same behavior...

Oh interesting. Saw cans and assumed electrolytic. Thanks for the correction.

Also the RAM has been swapped already with no change to the symptom.

@retr01 the loop lasts 5-7 seconds before a crash. A longer string results in a faster crash. It displays an error dialog “The application ‘unknown’ has unexpectedly quit, because an error of type 1 occurred.” The Mac will keep working but if I relaunch the Apple IIe app the Mac will hard...

I have a couple of Apple IIe cards for Mac. One works fine. The other will crash after a few seconds running a simple basic loop like: 10 PRINT "Hello, Tinker Different" 20 GO TO 10 RUN It's been recapped, reflowed and ultrasonically cleaned. Have you experienced this issue before? Any advice...

The PowerBook 2400 uses tantalum caps on it's motherboard but has some atypical (for Apple) through-hole electrolytic caps on its power/IO board. Location Capacitance Voltage Rating Diameter Height Temp Rating C39 100uF 10V 10mm 6mm 105º C48 100uF 10V 10mm 6mm 105º C47 150uF 6.3V 10mm...

That looks like your G2 and sub-contrast are too high. See the Service Source guide for adjusting them. Agree with a previous poster you're not actually getting a gray screen. ROMs could be bad, not installed correctly, or you have some broken traces. Have you checked the ROMs are in the right...

Six more months and many joints later and I still haven't had to replace the liner or deal with clogs. This thing is a beast compared to the Hakko.

I'd suspect the EGRET too. Have you tried leaving the machine powered up for a while? I've found that some will eventually boot if 'warmed up' for 10 minutes or so.

I spent some more time on this with a friend and have some updates from troubleshooting done since the last post. Replacing the sync processor and all 100uF caps on the neck board made no change. We went through the data sheet for the sync processor and noticed that it can used B+ as reference...

This is a super cool project. It'd be great if you leveraged AI/ML to sort chunks of bits by entropy for likelihood of being an actual icon.