brb@briar.UUCP (Brian Bertan) (09/23/86)
The Real-time clock on my PCAT does not tick once I turn the machine off. On power-up, it contains the time at which I last powered down. I thought that it might be the battery, however, the configuration and time remain stored in the non-volatile RAM. Any suggestions for diagnostics/repair? This problem is fairly recent; the beast was working fine for almost a year. Thanks, Brian
marty@ism780c.UUCP (Marty Smith) (09/25/86)
In article <372@briar.UUCP> brb@briar.UUCP (Brian Bertan) writes: >The Real-time clock on my PCAT does not tick once I turn the machine off. >On power-up, it contains the time at which I last powered down. I thought >that it might be the battery, however, the configuration and time remain >stored in the non-volatile RAM. Any suggestions for diagnostics/repair? > >This problem is fairly recent; the beast was working fine for almost a year. > I had a similar problem with my AT clone (American Micro Tech.) when I first bought it. The problem turned out to be the power supply; it didn't meet spec on an output line that was called "power is good". Apparently the real time clock used this line to determine whether to use the battery or the power supply for its power. Eventually, the problem got worse to the point where the setup information was lost when the machine was turned off. Anyway, the problem disappeared when AMT replaced the power supply. Hope this helps, Marty Smith
tth@unc.UUCP (Terry Hudgins ) (09/26/86)
To: mcnc!philabs!briar!brb
Subject: Re: PCAT Real-time Clock Problem
Newsgroups: net.micro.pc
In-Reply-To: <372@briar.UUCP>
Organization: CS Dept., U. of N. Carolina, Chapel Hill
Cc:
Bcc:
Hey, the real-time clock in my PCAT seems to not be working too! It's been
working fine for the last year or two but now it's off and Diagnostics
Setup won't fix it. I just figured I was going to have to get in there and
fool around with the battery. Reading Brian's article makes me hope one
of you hardware people out there will enlighten the net with all the ins&outs
of AT clocks and batteries.
Terry Hudgins {seismo,decvax}!mcnc!unc!tthscott@ubvax.UUCP (Scott Scheiman) (09/29/86)
-- When my PC/AT battery went out a few weeks ago for the first time, the people at Businessland who usually do our repair work here said that they were seeing a lot of batteries needing replacement around then. Apparantly they last about a year. BTW, my symptom was just like the original poster's: The clock stopped when the power was off. -- "Ribbit!" Scott (Beam Me Up, Scotty!) Scheiman Industrial Networking Inc. `/\/@\/@\/\ ..decvax!amd!ubvax!scott 3990 Freedom Circle _\ \ - / /_ (408) 980-5572 Santa Clara, CA 95050
mr@isrnix.UUCP (mr) (09/30/86)
> >Hey, the real-time clock in my PCAT seems to not be working too! It's been >working fine for the last year or two but now it's off and Diagnostics >Setup won't fix it. I just figured I was going to have to get in there and >fool around with the battery. Reading Brian's article makes me hope one >of you hardware people out there will enlighten the net with all the ins&outs >of AT clocks and batteries. > well, the timing of this discussion worked out nicely. after having to remove the fdisk out of our sick AT last week ("106 -- System Board Error"), inside, i saw this little grey box stuck onto the back of the unit with velcro. the box said "ibm battery" or some such. now this pc has _never_ kept its own time (or anything else important for that matter :-) and i'd like to ask what is its purpose? do they ALL not work? what does the diagnostics setup have to do with it? -- .^. michael regoli /|\ ...ihnp4!inuxc!isrnix!mr '|!|` iu - bloomington <mr@isrnix.UUCP> ...cbosgd!inuxc!isrnix!mr@seismo.CSS.GOV regoli@iubacs.BITNET
d25001@mic.UUCP (10/04/86)
>When my PC/AT battery went out a few weeks ago for the first time, >the people at Businessland who usually do our repair work here said that >they were seeing a lot of batteries needing replacement around then. >Apparantly they last about a year. My AT is now over two years old. (Yes, I was the first kid on the block to purchase one.) It still has its original battery (though not its original fixed disk). As of this posting, I have had zero trouble with the clock, etc. Looks like some batteries last longer than others. Carrington Dixon UUCP: { convex, infoswx, texsun!rrm }!mcomp!mic!d25001
silber@batcomputer.UUCP (10/06/86)
In article <843@isrnix.UUCP> mr@isrnix.UUCP (mr) writes: > >now this pc has _never_ kept its own time (or anything else important for >that matter :-) and i'd like to ask what is its purpose? do they ALL not >work? what does the diagnostics setup have to do with it? The PC-AT has a battery which keeps enough power around so that the clock settings and the set-up information does not get lost. When that battery starts to die you start getting time and set-up errors. -- ------------------------------------------------------------------------------ A million here, a million there ... they all add up. ------------------------------------------------------------------------------ Jeffrey A. Silber silber@devvax.tn.cornell.edu Business Manager JAS@CORNELLD Center for Theory & Simulation {decvax,ihnp4,cmcl2,vax135}!cornell!devvax!silber in Science & Engineering 265 Olin Hall Cornell University Ithaca, NY 14853