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Posted on Apr 22, 2008
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Problem with my BIOS CMOS Setting

I am having problem with my CMOS Setting, it doesn't retain any setting and I have to reset the date and time everytime I boot my system. I've changed the CMOS battery but the problem still persit. I recently flashed my BIOS to see if it will help, with no result, however I was able to bypass the BIOSTAR page and now I have a warning on the start-up page and i don't know what to do. The message read thus:
CMOS checksum error- Defaults loaded
Warning! CPU has been changed or CPU Ratio changed fail.
Please re-enter CPU settings in the CMOS setup and remember to save before quit!

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Iqbal Husain

Iqbal Husain

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  • Posted on Apr 23, 2008
Iqbal Husain
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Its due to your default CMOS setup does not match with your CPU configuration especially with CPU speed.

  1. To fixed the above problem goto BIOS and navigate settings of CPU, speed etc. Set the speed with the proper value as per manual. And save the settings.
  2. Infuture when you will load default, at that time also set the CPU settings.
  • The CMOS battery might not be connected properly or may be its not producing enough power as per needed by board. So have a look with another battery. Also clean the connection point of the CMOS battery.

Good Luck
Iqbal

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Bios password reset
hi

every laptops different but normally u can remove the cmos battery

when you put it back and start the laptop you have to go into cmos setting set the time date and year press default settings and save restart and that should reset the bios

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Nov 14, 2013 • Dell Inspiron 1000 Notebook
tip

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P4P800 - VM BIOS Version 1012 to Upgrade 1018 Now CMOS can't save Date & Time
I'm sorry to have to say this but your CMOS battery connection is bad. There is basically nothing you can do other than replace the whole motherboard if it is too much of a problem.

One of my many computers is like this as well. I'm lucky in that as long as I leave that computer plugged in (it doesn't need to be turned on just plugged in), the CMOS won't reset its self. If you aren't that lucky then I would seek out a replacement motherboard.
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Jun 18, 2012 • ASUS P4P800-VM Motherboard
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The best way to RESET the BIOS back to the factory defaults if you do not know the Reset jumper or there isn't one is to remove the CMOS/BIOS battery and wait for approx. 20 mins for the charge in the BIOS to discharge.
If you cannot wait that long then short out the battery terminals on the motherboard with a paper clip.
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May 23, 2012 • Computers & Internet
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The BIOS battery maybe under one of the panels on the bottom of the laptop or under the keyboard.
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You need to replace the cmos battery in your computer. Theu are usually Cr2032 batteries which you should be able to pick up for about £1.

unplug your computer and open the case.
When you look at the motherboard you should be able to easily locate the cmos battery cliped onto the mobo.
Take the old battery out and insert the new one.
put the case back on and plug the pc into the mains again.
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