Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uunet!tiamat!quintro!bpdsun1!rmf
From: rmf@bpdsun1.uucp (Rob Finley)
Newsgroups: comp.sys.ibm.pc
Subject: Re: AT clone keyboard woes
Keywords: AT, keyboards, problems
Message-ID: <1989Dec7.183037.18626@bpdsun1.uucp>
Date: 7 Dec 89 18:30:37 GMT
References: <1466@rodan.acs.syr.edu>
Reply-To: rmf@bpdsun1.UUCP (Rob Finley)
Organization: Harris Broadcast Div., Quincy, IL
Lines: 29


Thanks for specifying which family of PC you have.   In your case, it could
be either the single chip computer inside your keyboard or it could be the
single chip that sits on your motherboard that reads the computer and 
supports the 80286.  

Here is a method to flush out the gremlin:
First off, if the system fails regularly after about half an hour sometimes
regardless of which program you are running (in my case, my thermal problem
only showed up when running the CAD package that used that part of extended
memory :-(  I thought it was the program....) then you have a thermal problem.
Sometimes, when an unstable IC chip is about to give up permanently, it
fails when it gets warm.  Trade the keyboard (you knew that) or try running
the computer with a nude keyboard.  The latter one only works when your
system is out of warranty and the manufacturer doesn't care or if you can
get it apart without the manufacturer noticing.

The other gremlin can lurch in the 8048 single chip computer that sits by
the keyboard connector on the motherboard.  It is a 40pin chip that sits
up by the keyboard connector.  It often has a BIOS copyright sticker covering
it up.  While the keyboard lights tell me that it is inside the keyboard,
I have seen the motherboard dork everything up also.


Good luck!!!

Rob
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