Checksum Error?

I have a AMD K-6 300MHz with 64 MB RAM.  I just upgraded
to Win 98 from Win 95 a few weeks ago.  Occassionally,
when I boot the computer, I get a "Checksum Bad" error.
When this happens, my floppy 5.25 B: drive is disabled.
I have to go into CMOS and enable it.  Then everything is
fine.  What is causing these checksum errors and how do I
get rid of them?
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MATTCEIConnect With a Mentor Commented:
If only the 5.25 FD setting is getting changed,you most likely have a bad location in CMOS ram,and there's not much you can do about it.There's an outside chance the 5.25 is failing the 'Floppy Drive Seek' routine at bootup,but this shouldn't cause a CMOS checksum error.Try turning this off,see if that fixes it.

However,if after the error you find that all CMOS values (except possibly date/time) have been set back to default,it's probably just a weak CMOS battery.Could be that the only NON-default value is the 5.25 setting - try changing something else and see if that disappears also.A voltmeter would be required here;you should see close to 3 volts across the battery.If it's a rechargable type (usually blue and barrel shaped,right rear area of the motherboard),measure it after the system's been powered off for ~ 1 hour.If it's a 'button' battery (shiny,size of a quarter),just cleaning it with alchohol may do the trick.

One other possible cause is using an old XT power supply on an AT motherboard,but that's an unlikely scenario these days.
grshprAuthor Commented:
Oh yes, I forgot to mention that after I fix the error, the date in win 98 is wrong.
Does this affect your answer at all?
No - that's good.Means it's probably just a weak battery.

One more thing you should check,though,but only if you were inside the case changing jumpers on the motherboard recently: verify that the '~internal battery' jumper is correct.
does the weak battery make the flobby not to operate ?
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