18 Dec
2008
18 Dec
'08
7:31 a.m.
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Date: Wed, 17 Dec 2008 09:54:52 -0800
From: "Michael" <michaelgreen42 at comcast.net>
I've got a large number of Mac II's and
IIx's sitting around. None of
them post (I believe due to dead batteries which I understand is common to
them). Most of them are fairly yellow but intact. Is there any interest in
these for parts/whatever? I also have some IIci's in similar state
The Mac II and IIx require a working battery in order to trip the power
supply. However, the IIci does not. It will power up just fine with a
flat battery, because the power supply provides a 5V trickle, which the
motherboard makes use of.
So any IIci which does not power up has other issues.
All those machines are at or past an age where the surface mount
electrolytic caps should have leaked corrosive goo all over the logic
board. A good cleaning at the least would be a good idea, to prevent
further damage. Usually any damage from the leakage is not too hard to
repair with careful examination and judicial use of wire wrap (or other
tiny wires) and solder.
The IIci's logic board power-on circuitry is particularly susceptible to
this damage because four of the larger caps (47uF) are sitting on the
portion of the board which contains the power-on circuitry. So a common
symptom of capacitor-goo damaged IIci's is an inability to power up.
Where are you located? Shipping plays a large part in whether there will
be interest. The II and IIx are beasts which would cost a lot to ship.
The power supply in the IIci was also used in the IIcx, IIvi, IIvx, Quadra
700, Centris 650, Quadra 650 and PowerMac 7100. So at the least, you
should find some interest in the IIci power supplies.
Jeff Walther