What mounts on that big heatsink you are heating?
I guess you have already looked at the back of the CRT under the sheet of white plastic covering the solder side of the small board? I just found two cracked joints on mine that were the cause of a problem I was sure was on the analog board.
Got the proper mouse for it!
It’s the correct one with the squared connector end. The newer ones work, but having this one makes me feel better!
I’m amazed how usable this machine really is. I wasn’t sure if a 512 would be really limited to use or not, and it most certainly isn’t! Pretty much everything I have tried so far works fine on it. Incredible what all you can do with 512KB!
In an effort to nail down a potential replacement SWIM for my 5120, I began looking at SWIMs on other boards of a similar vintage. I have narrowed down the potential options to:
344S1029: the direct replacement, what I pulled off my 5120
344S1029-A: seen on 5126, PB100, 140, 170
343S1029-A: seen on PB100, 140, 170, 145B, 165, 180c (and I assume all others prior to the 150).
The SE/30, IIvi, LC, LCII, Classic, IIsi etc. all use the 344S0061-A, which is also PLCC-44 like the above but I'm not sure if they would be suitable as a replacement if power is a factor. My understanding is that SWIM is 100% backward compatible, even with IWC... and seeing that the PB100 / 140 / 170 are seen with two versions of the SWIM, one of those versions is found on the 5126, I'm venturing that early PB SWIMs would work just fine as a replacement on the 5120.
Does anyone have any specific knowledge about this? I haven't been able to find anything in search.