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Mentions of failing parts / issues here. YMMV. https://68kmla.org/bb/index.php?threads/macintosh-classic-analog-board-fluctuating-voltages.37408/

Looking at the construction of the Classic II vs say, an SE you can clearly see the cost-cutting measures. Not a fan of this. The Classic II (a.k.a. "Performa 200") was produced from approx 91-93. Steve Jobs was absent from apple from 85-97. Things that make you go "hmmm" ... p.s. I've...

I recently went through this special sort of breadboarding hell to diagnose an Apple][+ rom set :) I'm sure there's a better way, but this is my first time so I figured it would be a good learning exercise. The "Testing Apple II Europlus ROMs" article is a good start, and I agree with the OP...

@jajan547 I don't know but if you can upload the information I'll compare it and let you know. @lobust totally agree. At first I take a shot at understanding theory of operation before brute force, but If it comes down to it I will definitely just replace all caps. @slomacuser thank you! I...

I have this monitor that looks pretty good but the top of the display stretches out and then squeezes towards the top (see picture below.) Must be pretty low hours on it as well because I can find no sign of electrolyte leakage, the caps test out good with BlueESR, even the ones near the big...

Yea good point, I'll put it back together and try with a load.

Wow thanks for the tip! I feel a little bit silly for recapping now :) and will definitely reconsider when attempting on a board with this much goo. I found a seller on AliExpress selling RPT-60A power supplies for about 30USD including shipping but didn't order yet...

Ok I'll see if I have that in stock. I just checked it with Blue ESR meter and it checks out OK. There doesn't seem to be any leakage on that side of the board.

Yes I do. Agree, I'll clean it up some more.

No I didn't

Sure! p.s. As I said before, CR56 is missing, I took it out temporarily

Hello, I just recapped a TDK Power Supply, but when I power it up I hear the clicking sound. 12V looks pretty good, but 5V and -5V are erratic. I found a thread here suggesting that either CR51 or CR52 are shorted, but that doesn't seem to be the case. Does anyone have a schematic for this...