Path: utzoo!utgpu!watmath!focsys!jack
From: jack@focsys.UUCP (Jack Houde)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Looking for lost CMOS Ram article
Keywords: CMOS, battery
Message-ID: <493@focsys.UUCP>
Date: 19 Jun 89 22:57:43 GMT
References: <1724@ozvax.WV.TEK.COM> <562@bnr-fos.UUCP>
Reply-To: jack@focsys.UUCP (Jack Houde)
Distribution: na
Organization: Focus Automation Systems, Waterloo, Ontario.
Lines: 26

In article <562@bnr-fos.UUCP> mlord@bnr-public.UUCP (Mark Lord) writes:
>In article <1724@ozvax.WV.TEK.COM> wesw@ozvax.WV.TEK.COM (Wes Whitnah) writes:
>>
>>   My AT-compatible is loosing its CMOS ram quite regularly now
>>   (after EVERY power-up) and new batteries have not helped.
>
>Funny thing.  My AT clone has exactly the same problem.  I have even replaced
>the (socketed) Real Time clock chip but to no avail.  Next on the list is to 
>replace the CMOS ram chip if I can figure out which one it is.  If anyone else
>has any ideas, I'd sure love to hear them.  My email address is given below.
>
>Thanks
>
>-Mark        utgpu!bnr-vpa!bnr-fos!mlord%bnr-public 


Maybe this will help but, maybe not. We had a similar problem
with some of our systems loosing (or showing up as corrupted)
CMOS data upon powerup.

After lenthy testing, it was discovered that the power supply was
at fault. From what I gathered, the power supply was asserting
the POWER GOOD line before the power was stable which in turn
caused sporadic corruption of the data.

We changed the offending power supplies and gone was the problem.