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I’ll take another look but I didn’t see anything burnt while I was recapping the board. I think I read somewhere that the LM324 chip may be related to this issue, however I don’t know how true that is.

Sorry about the late response I got caught up with stuff, the sound issue originated from me accidentally shorting the sound chip and frying it. I have recapped the board but there is still no change The deflection yoke is fine I tested it. The voltage on the 5 & 12v rails are within a...

The CRT was working perfectly before the original analog board failed so I would think it’s fine. But I’ll still test it just in case, now since I don’t really want to screw anything up or get the the wrong readings how would I go about testing them? Would I test them from the connector or the...

Gotcha now here’s a dumb question, I have the correct spec capacitors for the board but they are all radial. Will they work or should I play it safe and just buy a recap kit?

It tries to but the sound doesn’t work, the drive spins up and tries to read the disk

so for context, I just got my hands on a new old stock analog board for my Mac 512k since my old one does not work anymore (power supply part is non functional) and after installing it I’m greeted by a single horizontal line seen in the photo. I’ve already resoldered the J1 and J4 connectors...

I’ll give that another go, I’ve already tried that a while ago with a hot air gun but still nothing. Unless I should desolder and re-solder every joint? But should I try my luck and buy a Mac Classic analog board to use for parts just in case reflowing again does not work?

The thing that kill my Mac was my friend smacking the side of the case, don’t know what he was thinking but the first smack just made the screen turn off for a couple of seconds then it came back on and the second smack was the killing blow. I’ve done some diagnosing and you can hear the flyback...

So it’s been a while but my Macintosh 512k is still very much dead. So I’ve done some thinking and looking around eBay for replacement parts (I don’t want to get a whole new machine at the moment) and saw that Mac Classic analog board are much cheaper than the 128k, 512k and Plus boards. So I...

Correction that resistor gives a normal reading after testing it again

I can’t tell if resistor R52 is bad or not with a continuity test and since I don’t know the resistance, I can’t tell with that either but it comes up as OL

I’ll take a look when I get back from my classes

As the title suggests I have a Macintosh 512k that has been having a power issue for a few months that I’ve been trying to figure out. Whenever I turn the Mac on there is a constant ticking noise coming from the internal speaker which occasionally slightly changes pitch and turns into a sound...