Path: utzoo!mnetor!uunet!husc6!bloom-beacon!tut.cis.ohio-state.edu!uwmcsd1!csd4.milw.wisc.edu!neighbor
From: neighbor@csd4.milw.wisc.edu (Jeffrey Alan Ding)
Newsgroups: comp.sys.apple
Subject: Re: baked apples
Message-ID: <5755@uwmcsd1.UUCP>
Date: 8 May 88 19:33:01 GMT
References: <8805052309.AA24541@wpi.local>
Sender: daemon@uwmcsd1.UUCP
Reply-To: neighbor@csd4.milw.wisc.edu (Jeffrey Alan Ding)
Organization: University of Wisconsin-Milwaukee
Lines: 33

In article <8805052309.AA24541@wpi.local> MPENDER@WPI.BITNET writes:
>
>Good luck, but if it comes down to a zapped
>motherboard, buy a new one, its not worth the
>headaches to try to find the individual broken
>resistor or capacitor.
>
>Mike.
>
Not worth the trouble?  Not worth the trouble?  What trouble.

One day I turned on my old Apple ][ computer and my cursor was no longer
blinking.  I thougt that to be very strange.  I quickly popped into BASIC
and tried displaying some flashing characters.  No luck at all.  All the
flashing was inversed.  My flashers didn't work anymore.

A quick reading of the old Apple ][ referance manual and an examination of
the Apple scematic lead me to the problematic circuit.

A 555 timer controls the flashing rate.  A capacitor and a resister make
up the timing for the 555 timer.  What happed was the capacitor went
bad.

Took me about 15 minutes time and ~.30 cents in parts to fix my computer.

And you want to buy a new motherboard???   Sounds like a dealer talking!

neighbor@csd4.milw.wisc.edu

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