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Re: PowerMac won't turn on after sitting in a cold bedroom

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nospam wrote:

> that's a dumb way to do it, although effective.

It was well documented in the TV service manuals of the 1950's and 1960's.
Dumb, yes, common, yes too.

> any chip can be destroyed by a spark and one far weaker than what you
> get off a crt/flyback.

Sure, but the Mac had a chip in the circuit where it would happen.
TV sets and computer monitors based on them did not. 

It may have been placed there on purpose to prevent non Apple techs from
working on them. Apple did all sorts of things like that, the other 
glaring one was the keyboard cable. Everyone in the world except Apple used
a reversed cable in that size, and they were plentiful and cheap. 

Use one on your Mac, and you have to replace an IC in the keyboard.

Another fix in the SE, the ADB, but I think that came with the Mac II,
which was earlier. I know there was a problem with plugging or unplugging
the ADB interface with the power on, but don't remember which. Either way
it was a bad design, later fixed.

Geoff.

-- 
Geoffrey S. Mendelson,  N3OWJ/4X1GM/KBUH7245/KBUW5379

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PowerMac won't turn on after sitting in a cold bedroom super70s <super70s@super70s.invalid> - 2014-03-07 21:36 -0600
  Re: PowerMac won't turn on after sitting in a cold bedroom Savageduck <savageduck1@{REMOVESPAM}me.com> - 2014-03-07 21:37 -0800
    Re: PowerMac won't turn on after sitting in a cold bedroom John Albert <j.albert@snet.net> - 2014-03-08 16:17 -0500
      Re: PowerMac won't turn on after sitting in a cold bedroom Your Name <YourName@YourISP.com> - 2014-03-09 12:12 +1300
        Re: PowerMac won't turn on after sitting in a cold bedroom super70s <super70s@super70s.invalid> - 2014-03-09 17:17 -0500
          Re: PowerMac won't turn on after sitting in a cold bedroom Jolly Roger <jollyroger@pobox.com> - 2014-03-09 23:06 +0000
            Re: PowerMac won't turn on after sitting in a cold bedroom super70s <super70s@super70s.invalid> - 2014-03-09 18:26 -0500
              Re: PowerMac won't turn on after sitting in a cold bedroom super70s <super70s@super70s.invalid> - 2014-03-09 18:53 -0500
                Re: PowerMac won't turn on after sitting in a cold bedroom Jolly Roger <jollyroger@pobox.com> - 2014-03-10 00:48 +0000
                Re: PowerMac won't turn on after sitting in a cold bedroom super70s <super70s@super70s.invalid> - 2014-03-09 20:58 -0500
                Re: PowerMac won't turn on after sitting in a cold bedroom Your Name <YourName@YourISP.com> - 2014-03-10 16:49 +1300
                Re: PowerMac won't turn on after sitting in a cold bedroom Jolly Roger <jollyroger@pobox.com> - 2014-03-10 15:30 +0000
                Re: PowerMac won't turn on after sitting in a cold bedroom Barry OGrady <atheist@hotmail.com.au> - 2014-03-22 10:54 +1100
                Re: PowerMac won't turn on after sitting in a cold bedroom Jolly Roger <jollyroger@pobox.com> - 2014-03-22 01:18 +0000
                Re: PowerMac won't turn on after sitting in a cold bedroom Alan Browne <alan.browne@FreelunchVideotron.ca> - 2014-03-10 17:05 -0400
                Re: PowerMac won't turn on after sitting in a cold bedroom nospam <nospam@nospam.invalid> - 2014-03-10 17:41 -0400
                Re: PowerMac won't turn on after sitting in a cold bedroom "Geoffrey S. Mendelson" <gsm@mendelson.com> - 2014-03-11 01:29 +0000
                Re: PowerMac won't turn on after sitting in a cold bedroom nospam <nospam@nospam.invalid> - 2014-03-10 21:48 -0400
                Re: PowerMac won't turn on after sitting in a cold bedroom "Geoffrey S. Mendelson" <gsm@mendelson.com> - 2014-03-11 05:49 +0000
                Re: PowerMac won't turn on after sitting in a cold bedroom nospam <nospam@nospam.invalid> - 2014-03-11 02:12 -0400
                Re: PowerMac won't turn on after sitting in a cold bedroom Jolly Roger <jollyroger@pobox.com> - 2014-03-10 15:28 +0000

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