Weird CMOS/coin cell symptoms???

  • Thread starter George R. Gonzalez
  • Start date
G

George R. Gonzalez

I have several computers here with weird symptoms. They're all Micron
Millenium models, from the stripped down to the Pro2.

They sometimes report "bad cmos checksum", or the clock is waay off, or they
forget their floppy disk or other CMOS settings.

I replaced the CR 2032 lithium cells. I even tested the old cells under a
light (2 milliamp) load. All the old and new cells measure in the range 2.8
to 3.1 volts, so they're probably all okay, both the old and the new ones.

The cell holders are clean, the hold-down clasps are REALLY STRONG.

Any ideas what's going on?

Thanks,


George
 
J

JAD

after you remove the battery short the jumper with the cord unplugged for a few seconds or if no jumper for a few minutes. Then
replace the battery boot and load CMOS defaults boot to Dos/windows safe mode if necessary. restart enter bios set to your liking,
but I suggest doing just a few things at a time and successfully boot after those changes.
 
U

user

George said:
I have several computers here with weird symptoms. They're all Micron
Millenium models, from the stripped down to the Pro2.

They sometimes report "bad cmos checksum", or the clock is waay off, or they
forget their floppy disk or other CMOS settings.

I replaced the CR 2032 lithium cells. I even tested the old cells under a
light (2 milliamp) load. All the old and new cells measure in the range 2.8
to 3.1 volts, so they're probably all okay, both the old and the new ones.

The cell holders are clean, the hold-down clasps are REALLY STRONG.

Any ideas what's going on?

Thanks,


George
Click to expand...
If you are reading a cell with a voltage of 2.8 volts, that one will
cause a loss of time for sure. Generally a new battery will read
something like 3.3 volts when measured outside of the holder. The best
way to measure a battery is after the computer has been off for a hour
or so, and doing it while it is mounted in it's holder.

If you keep replacing bad batteries with good ones and they rapidly
measure too low, you could have an excessive draw on the batteries.
Leaky capacitors on the bus for the battery supply is just one possible
cause.
 
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