Hi,

A working Classic II logic board is next to impossible to find. They suffer
of the same problem than the SE/30 one's: failing SMD capacitors. I'm
looking for one myself for a long time. Those offered on Ebay are almost
always dead and beyond repair.

Given the logic board you have is already burned, replacing all the SMD
capacitors won't likely solve the problem. 
You need a logic board with still a bit of life in it and them immediately
replace the capacitors.

You also mention no power and no HDD spin-up: these are unrelated to the
logic board as the CRT and HDD are powered directly from the Analog board.
So I guess your Classic II has multiple problems...

A good start is testing all the capacitors with an ESR meter.


Take Care,

Nico



-----Oorspronkelijk bericht-----
Van: [email protected] [mailto:[email protected]]
Namens SStrife
Verzonden: donderdag 4 november 2010 0:36
Aan: Vintage Macs
Onderwerp: Mac Classic II parts

I picked up a Classic II fairly cheaply off eBay. First day it worked
fine, but since then it's been having issues. At first it was just
stone dead, no power at all, then I replaced the main power cap on the
analogue board, and now it powers up, but is showing the "simasiMac"
symptoms. Long delay before startup bong, unexpected rebooting, no HDD
spin up, etc.

Checking the logic board reveals that whoever owned it before me tried
to repair the thing by replacing the caps, but has messed up the PCB
majorly in the process. Lifted tracks, burnt PCB, just a mess. I don't
have any hope of reviving this board.


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