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MicroMac is long out of business. :( The site is still up but the business is gone. It's cool having the site still around but it's sad because it teases us with all the upgrades that are no longer for sale.

This is the replacement flyback: https://www.ebay.com/itm/121655780759 A flyback transformer is custom for the circuit and purpose. It serves a precise function in the circuit and you can't replace it with a generic part like you can with a capacitor or general purpose transformer. I have...

There are NOS ones on eBay right now. You just got to pony up the money ($150).

Yeah, although the results are mixed. I've bought analog boards for their flyback and found that they had already started arcing or were nearing the end of their life. :( It's the analog board lotto.

You are a few years late. They used to go for $20 or so. Today you are lucky if you can find one for under $150. :cry:

UPDATE. I found a working SE analog board to use as a comparison. I tested continuity and resistance with a multimeter on all the components on the board and found some distinctly conflicting values near the flyback shield. CR7 - In circuit on a healthy board I get 4.26MΩ going from red to...

Yes, C15 ... the 3.9uF cap at the top of the board. I replaced it with an appropriate film cap.

Yes. I double checked every cap ... orientation is correct, specs are correct. There are no solder bridges. I also checked continuity for all of them along the traces and every one of them tests good. I am going through Larry Pina's Dead Mac Scrolls now to see if I can identify any commonly...

Just tested ... logic board works in a known-good SE case. Analog board problem confirmed.

Not yet. I will try that next.

Yes. The PSU seems to be working correctly (voltages look good). I also swapped another confirmed working SE PSU on the board and got the same result. So it looks like the fault is somewhere on the analog board itself.

It had been in an attic for years and I wanted to rework it before trying to turn it on. I've learned painful lessons from trying to turn on vintage equipment that has sat idle for years. (💥💨) I suspect that it would not have worked prior to recapping.

Hi all. I recently recapped a Mac SE's analog board and am having some trouble with it. When I turn the Mac there is no bong and the CRT lights up with a garbled display. After a few seconds the CRT will begin to dim. I tried adjusting the brightness knob at this time to see what would...

That sounds like a mistake during the recap job. There is no reason why new caps of the correct spec would doom a PSU.

Thanks trag! The interesting thing about the G4s was that if a new G4 with L2 cache was attached to a new CPU board it would treat the former L2 as L3 cache.  I was hoping that was the case with the G3s. :(

Does anyone happen to know if the entire range of G3 CPUs are pin-compatible with one another? In other words, can a 750FX (Sahara G3) be soldered onto a CPU card in place of an original G3 (Arthur)?  I know that the G4s are surprisingly interchangeable and I am hoping that the G3s are as well.

Thanks guys.  I will experiment on a small section.  I expect to retrobrite this Mac as it is because of needing to replace the faceplate too and the color doesn't exactly match.  So I will get the case one uniform color one way or another. :)

The Performa 400 did indeed ship after 7.0 was released BUT "Performa" is only a name.  All Performas are repackaged Macs in a "consumer friendly" way.  That is, a Performa is a base model Mac (LC, Quadra, PowerMac, etc) that is given a Performa name and number and packaged with a collection of...

It looks like paint.  I hope that there is some way I can remove it without ruining the case plastic.

A Performa 475 is NOT an LC III.  The Performa 475 is a 68LC040 and despite also running at 25 MHz, it will absolutely crush an LC III at everything.  It's not even close.  As Gorgonops pointed out, there is a 5x difference in performance from the 475 to the LCs.  That isn't an exaggeration. ...