Discussion:
CMOS checksum error - help!
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Doc Shenley
2007-04-30 06:04:10 UTC
Permalink
What is my computer trying to tell me? After a normal POST it halts with
the message - CMOS checksum error, defaults loaded. Press F1 to continue or
Del enter Setup. If I press F1 it continues with o/s boot, or if I press
Del I can change the settings which are then accepted in a normal boot.

It could be a duff battery I suppose (hope!), but how could I tell, and what
else could it be?
unknown
2007-04-30 06:41:45 UTC
Permalink
Post by Doc Shenley
What is my computer trying to tell me? After a normal POST it halts with
the message - CMOS checksum error, defaults loaded. Press F1 to continue or
Del enter Setup. If I press F1 it continues with o/s boot, or if I press
Del I can change the settings which are then accepted in a normal boot.
It could be a duff battery I suppose (hope!), but how could I tell, and what
else could it be?
It`s more than likely, a flat battery.
Replace, then review/change your BIOS settings;
then save & exit.
You should then not recieve that error message.
Also a good way to tell if the battery is flat,
is when your date/time is wrong.
Doc Shenley
2007-04-30 08:21:23 UTC
Permalink
Post by unknown
Post by Doc Shenley
What is my computer trying to tell me? After a normal POST it halts with
the message - CMOS checksum error, defaults loaded. Press F1 to continue or
Del enter Setup. If I press F1 it continues with o/s boot, or if I press
Del I can change the settings which are then accepted in a normal boot.
It could be a duff battery I suppose (hope!), but how could I tell, and what
else could it be?
It`s more than likely, a flat battery.
Replace, then review/change your BIOS settings;
then save & exit.
You should then not recieve that error message.
Also a good way to tell if the battery is flat,
is when your date/time is wrong.
If it is the battery, it's duff rather than flat. It's three days since the
computer was used regularly. I've reflashed the BIOS, taken out the battery
to kill anything that might be lurking and put it back in. I can't tell
whether it's faulty, because the default date set at bootup is 1 Jan 2002.
I've tried resetting the values half a dozen times, but I still get the
checksum error. Batteries seem to go on for ever and I've never had a
problem with them, that's one of the reasons I ask whether my problem could
have another source.
Rob
2007-04-30 10:34:02 UTC
Permalink
Post by Doc Shenley
Post by unknown
Post by Doc Shenley
What is my computer trying to tell me? After a normal POST it halts with
the message - CMOS checksum error, defaults loaded. Press F1 to continue or
Del enter Setup. If I press F1 it continues with o/s boot, or if I press
Del I can change the settings which are then accepted in a normal boot.
It could be a duff battery I suppose (hope!), but how could I tell, and what
else could it be?
It`s more than likely, a flat battery.
Replace, then review/change your BIOS settings;
then save & exit.
You should then not recieve that error message.
Also a good way to tell if the battery is flat,
is when your date/time is wrong.
If it is the battery, it's duff rather than flat. It's three days since the
computer was used regularly. I've reflashed the BIOS, taken out the battery
to kill anything that might be lurking and put it back in. I can't tell
whether it's faulty, because the default date set at bootup is 1 Jan 2002.
I've tried resetting the values half a dozen times, but I still get the
checksum error. Batteries seem to go on for ever and I've never had a
problem with them, that's one of the reasons I ask whether my problem could
have another source.
Why not reflash the BIOS then and see if that helps.
Gary R. Schmidt
2007-04-30 10:22:35 UTC
Permalink
Doc Shenley wrote:
[SNIP]
Post by Doc Shenley
because the default date set at bootup is 1 Jan 2002.
^^^^^^^^^Put in a new
battery, until this basic problem is fixed with a *new* battery all else
is a waste of time and effort.

Cheers,
Gary B-)
--
______________________________________________________________________________
Armful of chairs: Something some people would not know
whether you were up them with or not
- Barry Humphries
unknown
2007-04-30 13:17:23 UTC
Permalink
Post by Doc Shenley
Post by unknown
Post by Doc Shenley
What is my computer trying to tell me? After a normal POST it halts with
the message - CMOS checksum error, defaults loaded. Press F1 to continue or
Del enter Setup. If I press F1 it continues with o/s boot, or if I press
Del I can change the settings which are then accepted in a normal boot.
It could be a duff battery I suppose (hope!), but how could I tell, and what
else could it be?
It`s more than likely, a flat battery.
Replace, then review/change your BIOS settings;
then save & exit.
You should then not recieve that error message.
Also a good way to tell if the battery is flat,
is when your date/time is wrong.
If it is the battery, it's duff rather than flat. It's three days since the
computer was used regularly. I've reflashed the BIOS, taken out the battery
to kill anything that might be lurking and put it back in. I can't tell
whether it's faulty, because the default date set at bootup is 1 Jan 2002.
I've tried resetting the values half a dozen times, but I still get the
checksum error. Batteries seem to go on for ever and I've never had a
problem with them, that's one of the reasons I ask whether my problem could
have another source.
It`s almost certainly a flat(duff) battery.
But you could look at doing a bios jumper reset,
if the motherboard has one; and then load bios defaults,
save and exit...back into your bios, and then review/change
any individual settings...and you guessed it...save and exit.

Oh and by the way, batteries don`t go on forever (that dallas chip was a good idea though),
on average, they last 2-3 years...depending on how often you use your
PC, and how long it`s left on for.
Doc Shenley
2007-05-01 04:37:34 UTC
Permalink
Post by Doc Shenley
Post by unknown
Post by Doc Shenley
What is my computer trying to tell me? After a normal POST it halts with
the message - CMOS checksum error, defaults loaded. Press F1 to continue or
Del enter Setup. If I press F1 it continues with o/s boot, or if I press
Del I can change the settings which are then accepted in a normal boot.
It could be a duff battery I suppose (hope!), but how could I tell, and what
else could it be?
It`s more than likely, a flat battery.
Replace, then review/change your BIOS settings;
then save & exit.
You should then not recieve that error message.
Also a good way to tell if the battery is flat,
is when your date/time is wrong.
If it is the battery, it's duff rather than flat. It's three days since
the computer was used regularly. I've reflashed the BIOS, taken out the
battery to kill anything that might be lurking and put it back in. I
can't tell whether it's faulty, because the default date set at bootup is
1 Jan 2002. I've tried resetting the values half a dozen times, but I
still get the checksum error. Batteries seem to go on for ever and I've
never had a problem with them, that's one of the reasons I ask whether my
problem could have another source.
Battery replaced - $3.70 - and computer now working well. The board is an
AsusA7N8X-X, about 4 years old and not yet ready for scrap. Many thanks to
all those who took the trouble to read my posts and make constructive
comments.
Whatcher?
2007-04-30 08:11:49 UTC
Permalink
Post by Doc Shenley
What is my computer trying to tell me? After a normal POST it halts with
the message - CMOS checksum error, defaults loaded. Press F1 to continue
or Del enter Setup. If I press F1 it continues with o/s boot, or if I
press Del I can change the settings which are then accepted in a normal
boot.
It could be a duff battery I suppose (hope!), but how could I tell, and
what else could it be?
99 times out of 100, your battery is stuffed with that sort of answer. Easy
way to check. Set the time and turn the machine off and turn wall power off.
Wait 30 seconds. Turn it all back on again. If same result, your battery is
stuffed. Second test - turn machine off but leave wall power on. Wait 30
seconds and turn on again. If you didn't get the F1 or Del this time, then
definitely your battery is stuffed.

Your choices:

1) Get a new battery and install it. Easy.

2) Leave wall power on all the time and never worry.

3) If you have XP or Vista the time will auto reset once you are on the net
(or you can make it do it) so it isn't a real worry.

4) Get used to it.
Russell
2007-04-30 11:01:27 UTC
Permalink
Post by Doc Shenley
What is my computer trying to tell me? After a normal POST it halts with
the message - CMOS checksum error, defaults loaded. Press F1 to continue or
Del enter Setup. If I press F1 it continues with o/s boot, or if I press
Del I can change the settings which are then accepted in a normal boot.
It could be a duff battery I suppose (hope!), but how could I tell, and what
else could it be?
It'll cost you $5.00 for a new battery and thus piece of mind. :)

- Russell

P.S. It's your battery.
--
http://www.dynode.net/~rjw/
Whatcher?
2007-05-05 03:13:00 UTC
Permalink
Post by Russell
Post by Doc Shenley
What is my computer trying to tell me? After a normal POST it halts with
the message - CMOS checksum error, defaults loaded. Press F1 to continue or
Del enter Setup. If I press F1 it continues with o/s boot, or if I press
Del I can change the settings which are then accepted in a normal boot.
It could be a duff battery I suppose (hope!), but how could I tell, and what
else could it be?
It'll cost you $5.00 for a new battery and thus piece of mind. :)
Which piece?

Steve
2007-04-30 11:46:53 UTC
Permalink
I had this problem and thought it was the battery, turned out to be a faulty
MB..... tell me your board is a winfast K8S760MG-6LRS???

Steve
Jacques Strap
2007-05-01 00:04:28 UTC
Permalink
Post by Doc Shenley
What is my computer trying to tell me? After a normal POST it halts with
the message - CMOS checksum error, defaults loaded. Press F1 to continue or
Del enter Setup. If I press F1 it continues with o/s boot, or if I press
Del I can change the settings which are then accepted in a normal boot.
It could be a duff battery I suppose (hope!), but how could I tell, and what
else could it be?
Definitely Battery. Depending on type can be any size battery from
5cent to 10cent piece size or can be a Dallas Clock/Battery Chip.

The lifetime of batts and dallas chips is 8-10 years. If 'puter is
this old, time to take a trip to the dump and pick up a better PC.
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