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Do you mean it won’t post and no chime without a battery? All my last testing has been without battery.

I recently bought a Macintosh Quadra 605 And completed the following work. I checked the power supply and recapped it completely and it works like a champ rock steady voltages at the expected levels, I recapped the board using tantalum caps. Everything seemed to go really well. No pads damaged...

Check the -12V line from the analog board. I found that it wasn't making it passed the cable on mine. I cleaned up the plug area and reflowed the solder. It gets damaged if the nearby caps leak. Also try using the external speaker socket to see if you get sound. If you do, then it looks like the...

Nah it's not. There is a bit of epoxy which seals the joins which happens to have blobbed out (from the factory). I can't see any cracks or damage. In fact the flyback looks really good. Anyway I had recently gone over some B&W flyback with some success so I just did the same to my CC and the...

Here are some photos of the flyback when I removed it

Okay thanks for the reply. I did try taking a video in the dark but it was the middle of the day and it wasn’t that dark. I didn’t see any arcing. I’ve seen videos of this so I know what to look for. I’ll try again at night. Anyway I could try sealing the top of the flyback with epoxy and see if...

I recently recapped the logic board on my Mac Color Classic (actually a Performa 250 but same thing) The computer worked fine and readily switches on and everything seems to work. The other day I started it again and I heard a strange noise from the rear. So I opened it up and found that it was...

Hi I have a Macintosh colour classic and have also recently recapped the analog board and also have a funny buzzing/screeching noise coming from my CRT and flyback area but it’s really hard to determine exactly where it’s coming from. They display on mine is also perfect and everything else...

I just recapped my LC III today and it would not boot … just sat there with a black screen. The mother board is in great condition and the electrolytics had only barely started to leak but enough for it to not to work. Anyway, found this thread and after reversing C22 so that it’s opposite of...