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After my 84V mod (640x480), the heat of the 18V 5W Zener used at DL22 caused me a lot of lost sleep. I just wasn't satisfied with the heat it put off. After some in-depth study, it seems the way these Zeners keep cool is to dump all their heat into the legs, which is why the two stock Zeners...

Or a small flathead screwdriver that you can use at each end of the chip to slowly and carefully wedge it out. Mixing the chips won't harm the board.

Congrats, @Mac84 ! I didn't watch your entire video, but I did catch your exuberation and "Holy Crap if F'n works!" :LOL: Glad to see it was just the cable because those solutions really are the best kind. No soldering, cleaning or hacking required in that case! Just curious though if...

The rubber gel-filled shock absorbers used in my HyperDrive kit have done well through the years, as you can see in these photos: The drive is completely suspended by them. That was an appropriate measure to take to protect those extremely sensitive and expensive drives at the time. But...

Really? SCSI? If you don’t have an ancient PC that might me able to extract data from it, I’d suggest reaching out to Adrian of Adrian’s Digital Basement because I know he has such a setup and he might be able to extract data from it if you ship it to him. Packing it to avoid damage will be...

Anything connected to that BU406 transistor is a candidate for possibly being bad if the transistor dies and fries, but that appears not to be the case in your machine. It should be simple enough to desolder that resistor and test it though. Don’t rely on your “beeper mode” (continuity mode)...

I highly doubt the caps are the reason, but full disclosure, I did recap the drive mechanism in my HyperDrive Mac, in addition to its dedicated secondary PSU. But I had no issues with the HyperDrive kit prior to that Not sure the lack of head movement is the issue. I don’t think there is any...

Below are my two videos on the recapping and testing of that PSU. The only issue I had was with one capacitor that had ESR too low, and buying one with slightly higher ESR resolved it. But even with the low ESR cap, the power supply did work. Voltages were normal. So I must assume that...

I vividly recall seeing the "Tecmar Sweetens Apples" full page ads in my early MacUser magazine issues back in the day. I recall thinking, "Man that thing is massive!" even back then. But, Steve, after seeing your photos, that thing looks even bigger! 😅 I have a GCC HyperDrive 10MB kit...

Both ROM chips and the SWIM (or IWM on the 800K drive version Motherboard) should be socketed like this... If you have a mix of ROM versions and have a SWIM and IWM, just put a sticker on each chip and mark what is what before you start swapping. That's easier than looking up the part...

I have the Performer and WarpSE (prototype) and never had that behavior when using my FEMU on my SE. It seems you have more than one SE motherboard and different experiences with each. The ROM and SWIM (or IWM) are all socketed, so you may wish to try swapping out those chips to see if it has...

I contact Thomas Andrews exclusively via Facebook Messenger and I never have issues reaching him.

I see what you wrote in that other forum today, and you handled it nicely. 👍 I never tried to contact Thomas on your behalf only because I assumed he would reply to you, but do let me know if you ever want to persue his services because I can reach out to him about your contact attempt.

In the Resource section, I cannot find the "Mac Classic & SE" book that I linked in my previous post, but I do see these "related" PDFs... https://tinkerdifferent.com/resources/apple-technical-procedures-macintosh-se-and-macintosh-se-30.66/...

I saw you were getting hassled in “that other forum” today. Some people are in serious need of tact. Just wanted to follow-up to see if Thomas Andrews worked out.

The BU406 (Q2) mounted to the metal cage is the usual suspect. Could be CR2 as well. See pages 51-52 in the following Larry Pina book: https://archive.org/details/macclassicse00larr/page/51/mode/1up?view=theater

What’s really interesting about this is that we all could simply change our date to 2040 today and see what happens. Full disclosure, even I haven’t done that yet. 😅

You might want to check with Luke to see if either his listing or his choice of DF2 diodes is in error because right now it's the same as the stock diode: In other words... Because the stock DF2 diode normally doesn't burn, replacing it with the same exact low-wattage 0.5W part gets you...

Thomas Andrews owns Amiga of Rochester and is on the East Coast: https://amigaofrochester.com/about-us/ I paid him to fully clean, recap and do trace repairs on a 5126 Backlit Macintosh Portable, and he is well known in the community. He attends VCF shows too. On that form page, choose General...

Well, darn. I'm not using any VPN and I got the 403 today while doing nothing other than entering PACMAN in the search field and initiating the search. Clicking on the "fix this problem yourself" link yields this error screen... I then switched to Firefox to try it there, but upon trying...