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I have an SE with the soldered on black battery and I want to convert over to a standard holder. THIS ONE is out of stock, and with the state of supply chains right now it could be months. Does anyone know of another one that would fit? Maybe from Amazon or something where shipping isn't $10?

Thanks, I bought one. we'll see what happens with when it arrives.

I ordered a 296-33968-5-ND SN74LS166AD from Digi-key to replace my UE8 chip in my SE/30. When I look at the backorder status, it says March 2023! Wow! Is there another chip that will work? Does anyone have one they want to sell? I can confirm that this chip is too big: 296-SN74LS166ANSRCT-ND...

I've not worked on it much. I did go through the area with a continuity meter and fixed a few things. I'll see if I can get under those ICs with something.

I've used this microscope a few times now and found it annoying that the surface plate wasn't large enough to hold even a compact Mac logic board. So I took a few measurements and made a slip-on surface plate out of foam core and stick-on cork board from the dollar store. After making that and...

This is great. Are you planning network connectivity at some point? I'd love to browse hotline!

Thank you. Unfortunately, I know embarrassingly little about how to read a schematic. But this will help fix several issues I'm sure.

B to C does give a continuity beep. What puzzles me is the IIci runs fine for about 10 minutes before it starts the rebooting loop. I have another instance of this on my SE/30 that I'm repairing as well. I'm guessing in ALL instances of a trace coming up to a pad there should be a connection...

Same as this leg on UD13. I looks squared off, like it's supposed to be that way.

I reflowed the solder on UB13, UD13, and UE13 and started checking continuity. In the attached pic on UE13, I have no continuity between points A and B or points A and C. Does this trace look broken to you? Is there supposed to be continuity here? I looked at the schematics but I have no idea...

Testing the 470µF 16V Axial cap at C2 gives me .511 while testing a brand new 470µF 25V gives me .458. I usually don't replace the axials because they rarely ever leak. Knowing very little about caps, what do these numbers mean? What should be the tolerance on a 470? is .511 OK? Is 458 OK? Am I...

Thanks, Now if I only knew how to read schematics! I think the most puzzling part is that it works before it gets warm.

I love that old miniscribe sound! I have 3 Jasmine 20MB drives for that purpose.

I spoke too soon. after 19 minutes of running it went back into the reboot cycle booting over and over. I noticed there was a wonky via on the negative side of C14. I desoldered it and cleaned it up until I could see the metal pipe that makes up the via. I'm getting continuity between the...

I bought a "new" PSU from Herb at retrocomputing and it seems to have solved the problem. Thanks @Volvo242GT I'm working with Console5 to put together a recap kit for the Astec PSU for the Mac IIcx/IIci.

http://www.retrotechnology.com I just bought an Astec IIcx/IIci PSU from him.

Unfortunately, I don't have the other 2 any longer (I forgot to take them off my signature). That's the first thing I woulda tried. I looked on Console5 but they only have a cap kit for the GE PSU.

I am noticing the less time I let it sit, the sooner it starts the auto-rebooting. If I let it sit for 15 or 20 minutes I can boot it and start up techtool and read through the specs. If I only let it sit for 2 or 3 minutes, I can't even get through the boot cycle before it reboots.

The floppy isn't connected but I do have a 250MB spinner connected. What puzzles me is that it ran for 3 or 4 minutes so I know it's not a short. It didn't have a chance to heat up so I know it's not a heat or a heat related expansion problem. If there's anyone in New Jersey with a IIci PSU that...

I plan on recapping the PSU at some point, but I don't want to just blindly recap it without knowing this is a PSU issue and not a logic board issue. Recapping a IIci PSU is a HUGE pain.