Re: Will pay good money for NON working PET 2001 motherboard.

From: William Levak <wlevak_at_sdf.lonestar.org>
Date: Sun, 8 Nov 2009 05:10:37 +0000 (UTC)
Message-ID: <Pine.NEB.4.64.0911080502400.25860@sdf.lonestar.org>
On Sun, 8 Nov 2009, Philip Lord wrote:

>>> First thing I noticed was that there were many keys not working or
>>> working sporadically, however I was still able to quickly write a
>>> 'hello world' program to confirm that the basic was function
>>> correctly. All seemed good until I tried to load a tape. After typing
>>> 'LOAD' and pressing return the computer would freeze. I would not get
>>> the 'press play now' message, and the tape drive would no longer
>>> function. Turning the machine off and on again brought the machine
>>> back to life, and the tape drive was able to move again through FF,
>>> REW and PLAY buttons. Typing LOAD or SAVE would lock everything up
>>> again.

Sounds like a short in the cassette moter switching transistors, Q1 - Q6.

Problems with the keys is normal for these computers.  First thing to try 
is to take apart the keyboard and clean the contacts with alcohol.


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Received on 2009-11-08 06:00:03

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