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Thank you for so much detail. I'll start by testing out the SDQ lines on the VRAM ICs and work from there. If it's bit 0 then it should be pin 2 on one of them but I'm not familiar with the schematic so it could potentially be any of them. And if only one bit is bad, then I should be able to get...

Update. I replaced the video mux chips and now I’m getting a pretty simple simasimac pattern. I believe an analog board recap should fix this right up. Thanks for all the suggestions, everyone.

In my cursory research, I determined that superglue was the most widely available alkyl-based adhesive. I am far too cowardly to put superglue on my vintage cases. But if you find a good method for doing so, you have discovered the most expedient application of this method already. If it works...

Could you please clarify your last paragraph? I don’t quite understand what you mean. Edit: never mind I understand now. I can source some contact paper and give that a shot as well. I am REALLY interested in sourcing just the alkyl based adhesive as I could cover the entire machine in it at...

Not post it’s. That is a separate experiment to test that adhesive. The Brother label printer labels definitely do this. But I don’t know the time interval so I’m running another experiment with the brother label, the big one under the crt. The upside to this method would be not bleaching out...

The post-it is to experiment with that adhesive as well.

Hello gentlefrens, I may have inadvertently discovered a method to restore original color (ie de-yellow) of compact Macs. I have a modest but complete collection of compact Macs. As part of my inventory control, I had been placing Brother label printer labels directly onto the plastic below...

Fortunately the multiplexers are jellybean parts so I’ll do a quick swap. Thanks for this tip. I’ve identified the Bolle Jedec files I would need, so I’ll grab a stack of GALs as long as I’m having parts shipped

Ok, thanks so much

One of the chips in that bank, the one to the immediate SW of C7 had verdigris at the package seam and is suspect. Thank you for your confirmation that these are potentially related.

This SE/30 didn’t have any battery leakage, but the aluminum electrolytic were leaking. Recapped with polymers. I only found verdigris on the legs of one IC southwest of the video chip and cleaned that up. I did run the board through ultrasonic without first removing the crystals. At first I...

There is definitely a micro switch on the PSU that actuates when it’s seated. I have had good luck with Deoxit D100 when those get wonky.

Will the PSU power up with no load? Most of the PSUs of that vintage that I deal with don’t. My plan rn is to swap the RIFA, and inspect everything. Edit: ya these RIFAs are shot. There looks to be several to-220 linear regulators in there. Is it good practice to replace these with modern...

That would be awesome!

Thank you. I’ve got some new actual RIFAs on hand as well as some replacement X caps kicking around. I don’t like to recap before applying power in typical situations because if it works and then doesn’t work after a recap I know I messed up. If I recap without powering it on first it makes...

Hey all, I just took delivery of a Lisa 2. I’ve got it set up in my lab, but i haven’t applied power yet. Is there an SOP for what to test before first attempting to turn it on? According to the seller, this was an estate sale piece that hasn’t been powered on many years. Thanks so much in...

Greetings all. I've performed a recap of a Mac SE with a Sony PSU to include the analog board and logic board. When first applying power it powered up without issue and I shut it down. When applying power for the second time, I heard a snap from the PSU but the machine stayed powered up. I was...