A couple years ago I bought a mac se FdHd. It worked when I got it but shortly after had a horizontal line on the screen and wouldn't boot. I recapped the power supply and analog board and yesterday I finally got around to putting it back together. It did work last night but this afternoon when I turned it on, it started repeatedly chiming and a clicking sound could be heard from it for a couple seconds. It has had the clicking problem before but the computer still booted. Now it's not very happy at all.
I'm just wondering if anyone knows what's wrong with it.
Thanks
The clicking sound may be evidence of a short circuit.
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Analog board, i.e. power supply most likely.
Shot in the dark here... But you did replace C15 on the Analog board with a NP (non-polarized) cap, correct?
If the cap was a not a NP it will most likely release all of its secret smoke which is very hard to get back in.
wm
I believe that is the one cap I forgot about... I'll look for a replacement.
I have confirmed that to be the one cap in the whole thing I forgot to replace... lucky I guess?
Actually, I was only concerned that you might have replaced that with a polarized cap. That perhaps would explain why it worked for a brief time and then stopped working when the cap failed. You certainly could try replacing it (or test with two electrolytics back-to-back in series) but it probably is not your problem.
The 3.9uf caps are rather expensive not knowing if it will do anything or not, could I use 3.3uf or 4.7uf instead? They are much cheaper.