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A leg rotted off. Having a lot of trouble trying to uncover those traces that were blackened. Can't get solder to stick to those two pads. Will order a LS166, and see if I have to use bodge wires, hope not.

If none of the above works, will be paying special attention to UE8, and in particular this trace that seems to go to the bottom of the LB, there is no via to test on the top side.

After watching this video @0:42: That's the exact same simasimac pattern I have. He concludes fairly early on that he should've tried some different RAM to start off with, before going so far in to the repair process. I have 4Mb of tested RAM in my SE, that I'll be trying out in the SE/30...

Everything was going really well, until I plugged it in. Seems I've joined the simasimac club, except I get no chime, just an opening pop/crack as if a sound might begin to play (very brief pop/click), and then only this. The chains. Checked the ROM slot, and found a small piece of plastic...

Got the 1.44 floppy rebuilt. Stock grease and gears. Some mold growing on my cheese gear? Barely touched the moldy cheese gear with my thumbnail to remove it from the case, and a chunk came off of the small inner gear. DuPont Molykote from Japan. These Betterbit eject gears from ebay are...

Ebay has a decent selection, went with the Japan Molykote, instead of Dow Corning, got one from CA, as opposed to NJ, was trying to get it quicker. https://www.ebay.com/itm/387715756346

I nearly installed (2) caps backwards in the logic board, again. No hot polyester confetti party this time though, didn't power it up backwards. Couldn't believe I did it the first time on the SE logic board (same two caps even C18, C11), C18 popped and stunk the house up for an evening. Guess...

Got the eject gear from Betterbit. Recapped the floppy. Was watching the JDW video for the 1.44Mb floppy, and he recommends using Dow Corning EM-30L lube for the entire drive. Just ordered some from here in California, hopefully it gets here soon.

Nice work! What gave you the clue that it was the LS393 chip causing this? Was the chip visibly corroded?

This SE/30 is coming together a lot faster than my SE restoration. It's always easier the second time around. Got the PSU done, fresh heat grease too. Logic, analog, and PSU finished. Ordered the yellow tantalum caps, got all black, can live with it. Clear glue on all the same factory...

Didn't seem like that many parts when I was ordering, but that's every cap in the SE/30. Time to get started.

Got the SMD caps removed, and the board cleaned of corrosion. Will freshen up the solder pads tomorrow. Hopefully the Mouser order shows up tomorrow.

Not a fan of the large molex adapter, I like the one I got, great flow and very quiet. Both the 3-pin and 4-pin run at 3000RPM, and cost the same. Thanks.

I bought the 5V fan in error, and then waited for Amazon to stock the 12V again for over a month, they have plenty now. https://www.amazon.com/dp/B00VXTANZ4 Had to cut the 4-pin end off, and heat shrink the blue and green wires on the SE I just finished. Plan to do this same thing to the...

Thank you all so much for laying out all of the current upgrade options for the SE/30, it's very helpful and I'll keep re-reading this in order to make a final decision. I'll wait to decide on the ROM/RAM, until this one is recapped and 100% working, before adding anything new. All of the new...

Thanks for the replies! I see that the BMOW ROM disables the memory test over 16+Mb of RAM, would that still not be a reason to go 128Mb and max it out? https://www.bigmessowires.com/mac-rom-inator-ii/

Which is the best 32-bit clean ROM, and 128Mb RAM kit, available for the SE/30 today?

You both just made my day, thanks for the info! I'll twist those old caps off, and get the board cleaned up this evening.

Thanks for the info, wasn't certain how much different or improved things were from the SE model. Thanks too for letting me know those are the factory caps, I thought they had to be. I also thought that this SE/30 had not been opened before, but I see now that this was the 4Mb RAM, 80Mb HDD...

Ordered a floppy eject gear, all the caps for the PSU, analog, logic, and floppy, and ordered a 12V Notcua fan. Looks like the case will clean up fairly well. Had a large industrial strength velcro strip on it. Was able to get most of the scuff marks off the bezel, more work to be done...