CMOS checksum error

In article <Xns94C8B131A596D04112004 RemoveThis @195.131.52.135>, HilaryDuff133
@ablang-duff.com says...
  > I just 'inherited' a p3-500, and every now and then, upon bootup, I
 > will see the "CMOS checksum error" message. What does that mean and how do
 > I remedy it?
 >
THe CMOS backup battery is going flat and it is resetting to factory
default. You need to change the battery on the motherboard.


--
Conor

If you're not on somebody's shit list, you're not doing anything
worthwhile.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error 

Conor <conor_turton.RemoveThis@hotmail.com> wrote in message news:<MPG.1ae3f4c6ae48ba2398a2ce.RemoveThis@news.claranews.com>...
 > In article <Xns94C8B131A596D04112004.RemoveThis@195.131.52.135>, HilaryDuff133
 > @ablang-duff.com says...
   > > I just 'inherited' a p3-500, and every now and then, upon bootup, I
  > > will see the "CMOS checksum error" message. What does that mean and how do
  > > I remedy it?
  > >
 > THe CMOS backup battery is going flat and it is resetting to factory
 > default. You need to change the battery on the motherboard.

Not true. I had the same problem and a new battery made no
difference. Googling pointed to some kind of communication problem
between the CPU and the memory. I reseated the CPU in the socket and
it cleared it right up. Strange I know, but that's what did it.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error 

On 12 Apr 2004 00:51:47 -0700, MXCrules450.TakeThisOut@hotmail.com (MXC rules!) wrote:

 >Conor <conor_turton.TakeThisOut@hotmail.com> wrote in message news:<MPG.1ae3f4c6ae48ba2398a2ce.TakeThisOut@news.claranews.com>...
  >> In article <Xns94C8B131A596D04112004.TakeThisOut@195.131.52.135>, HilaryDuff133
  >> @ablang-duff.com says...
   >> > I just 'inherited' a p3-500, and every now and then, upon bootup, I
   >> > will see the "CMOS checksum error" message. What does that mean and how do
   >> > I remedy it?
   >> >
  >> THe CMOS backup battery is going flat and it is resetting to factory
  >> default. You need to change the battery on the motherboard.
 >
 >Not true. I had the same problem and a new battery made no
 >difference. Googling pointed to some kind of communication problem
 >between the CPU and the memory. I reseated the CPU in the socket and
 >it cleared it right up. Strange I know, but that's what did it.

Errr, ok, but that's a very unusual problem you had. Typically the CPU
will stay in the socket unless the system is moved about violently, most
often it's the battery causing this to suddenly start happening on a
machine that age.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error 

"kony" <spam RemoveThis @spam.com> wrote in message
news:ktkk70dqdfood2a69opfl7g2o0m2f66hfq@4ax.com...
 > On 12 Apr 2004 00:51:47 -0700, MXCrules450 RemoveThis @hotmail.com (MXC rules!) wrote:
 >
  > >Conor <conor_turton RemoveThis @hotmail.com> wrote in message
news:<MPG.1ae3f4c6ae48ba2398a2ce RemoveThis @news.claranews.com>...
   > >> In article <Xns94C8B131A596D04112004 RemoveThis @195.131.52.135>, HilaryDuff133
   > >> @ablang-duff.com says...
   > >> > I just 'inherited' a p3-500, and every now and then, upon bootup,
I
   > >> > will see the "CMOS checksum error" message. What does that mean and
how do
   > >> > I remedy it?
   > >> >
   > >> THe CMOS backup battery is going flat and it is resetting to factory
   > >> default. You need to change the battery on the motherboard.
  > >
  > >Not true. I had the same problem and a new battery made no
  > >difference. Googling pointed to some kind of communication problem
  > >between the CPU and the memory. I reseated the CPU in the socket and
  > >it cleared it right up. Strange I know, but that's what did it.
 >
 > Errr, ok, but that's a very unusual problem you had. Typically the CPU
 > will stay in the socket unless the system is moved about violently, most
 > often it's the battery causing this to suddenly start happening on a
 > machine that age.

Power spikes (lightning) can wipe the CMOS memory. The checksum detects
this. When you exit from the CMOS Setup and SAVE the settings, the
checksum will be recomputed and stored. The problem should go away. If it
doesn't, the next easiest thing to try is the battery -- its a hearing aid
battery (usually #2032) and is available at Radio Shack for a few dollars.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error 

On Mon, 12 Apr 2004 13:09:07 GMT, "William W. Plummer"
<William.PlummerXNOSPAMX RemoveThis @alum.mit.edu> wrote:


 >Power spikes (lightning) can wipe the CMOS memory. The checksum detects
 >this. When you exit from the CMOS Setup and SAVE the settings, the
 >checksum will be recomputed and stored. The problem should go away. If it
 >doesn't, the next easiest thing to try is the battery -- its a hearing aid
 >battery (usually #2032) and is available at Radio Shack for a few dollars.
 >

If a lightning strike clears your CMOS I suggest replacing the
motherboard... the odds of having it cleared but no other damage are
rather remote.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error 

I agree that the battery is the first thing i would try.

doughnut



"Stacey" <fotocord.TakeThisOut@yahoo.com> wrote in message
news:c5d3vu$agl2$3@ID-52908.news.uni-berlin.de...
 > Ablang wrote:
 >
  > > I just 'inherited' a p3-500, and every now and then, upon bootup, I
  > > will see the "CMOS checksum error" message. What does that mean and how
  > > do I remedy it?
  > >
 >
 > The common answer is the cmos battery but... I had a P4P800 with a P4 2.8
 > doing this, the battery is fine, turned out the PSU was the culprit.
Given
 > you are getting this randomly, my bet is on the PSU being flakey.
 >
 > --
 >
 > Stacey<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error 

I had this same problem with an HP Pavilion on which I had just replaced the
POwer supply and now I get continuous error messages 'cannot find operating
system.' The BIOS cant find the hard drive or any boot drive.

I continuously go into the bios and reset it, entering all the paraeters and
exit saving everyting and on re-boot, everything is lost all over again. (HP
didnt have the vaguest idea what was causing this ) but the error message on
HARD boot was accompanied occasionally by an invalid checksum message. So I
tried testing the battery and it does read 3.02 volts (presumably about 3
under load?)

Anyone know what this might be?

Hugo
"William W. Plummer" <William.PlummerXNOSPAMX.TakeThisOut@alum.mit.edu> wrote in message
news:Txwec.122417$K91.335600@attbi_s02...
 >
 > "kony" <spam.TakeThisOut@spam.com> wrote in message
 > news:ktkk70dqdfood2a69opfl7g2o0m2f66hfq@4ax.com...
  > > On 12 Apr 2004 00:51:47 -0700, MXCrules450.TakeThisOut@hotmail.com (MXC rules!)
wrote:
  > >
   > > >Conor <conor_turton.TakeThisOut@hotmail.com> wrote in message
 > news:<MPG.1ae3f4c6ae48ba2398a2ce.TakeThisOut@news.claranews.com>...
   > > >> In article <Xns94C8B131A596D04112004.TakeThisOut@195.131.52.135>, HilaryDuff133
   > > >> @ablang-duff.com says...
   > > >> > I just 'inherited' a p3-500, and every now and then, upon
bootup,
 > I
   > > >> > will see the "CMOS checksum error" message. What does that mean
and
 > how do
   > > >> > I remedy it?
   > > >> >
   > > >> THe CMOS backup battery is going flat and it is resetting to factory
   > > >> default. You need to change the battery on the motherboard.
   > > >
   > > >Not true. I had the same problem and a new battery made no
   > > >difference. Googling pointed to some kind of communication problem
   > > >between the CPU and the memory. I reseated the CPU in the socket and
   > > >it cleared it right up. Strange I know, but that's what did it.
  > >
  > > Errr, ok, but that's a very unusual problem you had. Typically the CPU
  > > will stay in the socket unless the system is moved about violently, most
  > > often it's the battery causing this to suddenly start happening on a
  > > machine that age.
 >
 > Power spikes (lightning) can wipe the CMOS memory. The checksum detects
 > this. When you exit from the CMOS Setup and SAVE the settings, the
 > checksum will be recomputed and stored. The problem should go away. If
it
 > doesn't, the next easiest thing to try is the battery -- its a hearing aid
 > battery (usually #2032) and is available at Radio Shack for a few dollars.
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error 

On Mon, 12 Apr 2004 14:16:51 GMT, kony <spam.RemoveThis@spam.com> wrote:

 >On Mon, 12 Apr 2004 13:09:07 GMT, "William W. Plummer"
 ><William.PlummerXNOSPAMX.RemoveThis@alum.mit.edu> wrote:
 >
 >
  >>Power spikes (lightning) can wipe the CMOS memory. The checksum detects
  >>this. When you exit from the CMOS Setup and SAVE the settings, the
  >>checksum will be recomputed and stored. The problem should go away. If it
  >>doesn't, the next easiest thing to try is the battery -- its a hearing aid
  >>battery (usually #2032) and is available at Radio Shack for a few dollars.
  >>
 >
 >If a lightning strike clears your CMOS I suggest replacing the
 >motherboard... the odds of having it cleared but no other damage are
 >rather remote.

before replacing it I would try re-flashing Bios; may help!

--
Happy Easter & Regards, SPAJKY ®
& visit my site @ <a style='text-decoration: underline;' href="http://www.spajky.vze.com" target="_blank">http://www.spajky.vze.com</a>
"Tualatin OC-ed / BX-Slot1 / inaudible setup!"
E-mail AntiSpam: remove ##<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error 

D Manzaluni wrote:

 > I had this same problem with an HP Pavilion on which I had just replaced
 > the POwer supply and now I get continuous error messages 'cannot find
 > operating

Did it do this with the old PSU? I had this problem and a good PSU fixed it.
I suppose a bad new one would do the same thing!

--

Stacey<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error 

"Stacey" <fotocord DeleteThis @yahoo.com> wrote in message
news:c5ihtl$226m2$7@ID-52908.news.uni-berlin.de...
 > D Manzaluni wrote:
 >
  > > I had this same problem with an HP Pavilion on which I had just replaced
  > > the POwer supply and now I get continuous error messages 'cannot find
  > > operating
 >
 > Did it do this with the old PSU? I had this problem and a good PSU fixed
it.
 > I suppose a bad new one would do the same thing!


Hi,

I don't know if this is applicable, but I was getting that error just
yesterday, while experimenting with lowering the Vcore (core voltage) on a
motherboard.

Jim<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error 

ohaya wrote:

 >
 >
 > Hi,
 >
 > I don't know if this is applicable, but I was getting that error just
 > yesterday, while experimenting with lowering the Vcore (core voltage) on a
 > motherboard.
 >


I have a feeling that what happens when the PSU is flakey, the Vcore to the
CPU drops too low. This "flakey" PSU that was giving me bios checksum
errors on a P4 2.8C with a radeon 9800 pro works perfectly fine on another
system with a P3 800 voodoo 4.
--

Stacey<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error 

"Stacey" <fotocord.TakeThisOut@yahoo.com> wrote in message
news:c5kjf9$2nk3r$3@ID-52908.news.uni-berlin.de...
 > ohaya wrote:
 >
  > >
  > >
  > > Hi,
  > >
  > > I don't know if this is applicable, but I was getting that error just
  > > yesterday, while experimenting with lowering the Vcore (core voltage) on
a
  > > motherboard.
  > >
 >
 >
 > I have a feeling that what happens when the PSU is flakey, the Vcore to
the
 > CPU drops too low. This "flakey" PSU that was giving me bios checksum
 > errors on a P4 2.8C with a radeon 9800 pro works perfectly fine on another
 > system with a P3 800 voodoo 4.
 > --
 >
 > Stacey

Well, that kind of makes sense, as I'd imagine that a P4 2.8C would use more
power than a P3 800. Some (most?) of the consumer-grade power supplies are
designed to overall power output ('x' watts) among all the different
voltages, so if something is drawing current on one voltage, it could cause
the other voltage outputs to be able to support less current (and still
maintain 'x' watts output. The Antec 'Truepower' supplies are designed to
have dedicated outputs on at least some of the voltage outputs.

Anyway, sorry for going on...<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error 

ohaya wrote:

 >
 > "Stacey" <fotocord RemoveThis @yahoo.com> wrote in message
 > news:c5kjf9$2nk3r$3@ID-52908.news.uni-berlin.de...
  >> ohaya wrote:
  >>
   >> >
   >> >
   >> > Hi,
   >> >
   >> > I don't know if this is applicable, but I was getting that error just
   >> > yesterday, while experimenting with lowering the Vcore (core voltage)
   >> > on
 > a
   >> > motherboard.
   >> >
  >>
  >>
  >> I have a feeling that what happens when the PSU is flakey, the Vcore to
 > the
  >> CPU drops too low. This "flakey" PSU that was giving me bios checksum
  >> errors on a P4 2.8C with a radeon 9800 pro works perfectly fine on
  >> another system with a P3 800 voodoo 4.
  >> --
  >>
  >> Stacey
 >
 > Well, that kind of makes sense, as I'd imagine that a P4 2.8C would use
 > more
 > power than a P3 800. Some (most?) of the consumer-grade power supplies
 > are designed to overall power output ('x' watts) among all the different
 > voltages, so if something is drawing current on one voltage, it could
 > cause the other voltage outputs to be able to support less current (and
 > still
 > maintain 'x' watts output. The Antec 'Truepower' supplies are designed to
 > have dedicated outputs on at least some of the voltage outputs.
 >
 > Anyway, sorry for going on...

Not at all, makes sense to me. And in addition, this PSU worked fine with a
2.4/533 and a geforce Ti4200 with the same Mobo. When I swapped in the 2.8C
and the 9800 it freaked out.
--

Stacey<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: CMOS checksum error