Question about ASUS P4P800-MX Motherboard

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Problem: set wrong jump Cmos

Pls help me solve the prolem : set wrong jump Cmos,time not update that some time appear when start my computer - press F1 to enter setup, Press F2 to load defaut...Help Me

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  • Anonymous Mar 18, 2014

    turn on computer displayed cmos setting wrong f1 to run but cmos not setting & hang computer



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Do you still have you're manual?
Go to page 1.18.
If the bios jumper is not over pin 1 & 2, than make it so.
While the jumper is on 2 & 3 you're bios clears it's self every time you boot the system. (This is why you're clock does not keep the correct time.)
Need manual? Click on the link.

Good Luck!
If I can help you further, feel free to post.
Suggestions & comments welcomed.


Posted on May 24, 2008


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Posted on Jan 02, 2017


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Shuttle xp, ntldr is missing

replace the cmos battery, reboot the computer go into bios reset date and time and change boot order cdrom to boot first save changes. boot from windows xp cd do a repair. form command type sfc /scannow checks all system files.if any are bad should repair them.

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Getting a CMOS checksum bad error when starting my Acer M5640 Desktop with Windows 7 Thanks Daniel

Solutions to CMOS Checksum Bad Error

The CMOS Checksum Bad Error can be fixed easily by following the listed steps carefully.

CMOS Battery may not be functioning properly

If you suspect that your CMOS battery is not functioning properly, you can easily change it. Before changing your battery, reboot your computer to make sure that the error still exists. If it does, go into your CMOS and write down all of the settings. If all the settings are lost, you can usually retrieve them from your computer manufacturer. Now locate the battery and remove it, you might need to consult your computer's manual or technical support to remove your battery (the battery a flat, shiny silver colored and coin-shaped). Take down the CMOS battery's information such as volt, size, etc. Once you have your new battery, you can replace it and reenter your CMOS settings. If your battery was the cause of the CMOS Checksum Bad Error, you should have solved the problem.

Your BIOS may have been updated

If your BIOS have been updated recently, your CMOS settings may have reset. Make sure that the values entered in the BIOS are correct or simply reset them to the default settings. If you believe that a virus has updated your BIOS settings, run a virus scan and make sure that the BIOS settings are back to the default.

The Computer may not have been shut down properly

Sometimes when running MS Windows, if you shut down your computer without first properly shutting down your operating system, it will corrupt the CMOS settings causing the CMOS Checksum Bad Error. You can easily avoid this error by making sure that you completely shut down your computer properly before turning off the main power. Usually this entails going into the Start Menu, clicking on Turn Off Computer/ Shut Down. If improper shutdown was the cause of the error, you may have solved the issue.

akuma_ryu21 rate it pls!!

Jan 21, 2011 | Computers & Internet

1 Answer

How to connect cmos cables for this motherboard series?

The date and time are incorrect. The CMOS battery may need changing unless you haven't set the date and time.

Press either F2 or Delete on boot.

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Cmos setting not saved

Look at the CMOS reset jumper, located near the battery:
For normal operation there should be a cap shorting pins 1 and 2.
Set the jumper correctly, make sure it really shorts these two pins (once I've seen a jumper cap that didn't have the metal connector inside, only plastic), replace the battery and it should keep the CMOS settings.

Dec 19, 2009 | ASUS P5PE-VM Motherboard

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How to solve CMOS checksum and timer errors?


Your backup battery is to weak to save the cmos data. Open your computer case and look for a round silver battery that looks like a quarter. Remove it and go to Radio Shack or a drug store battery section and get a replacement. The battery number is probably CR2032 but may be CR2025 or CR2016. insert the new battery and power up your computer, this time when you set the time and date the settings will stay when you turn it off.

I hope this helps, If so please rate our solution.

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CMOS Battery do no work

Just change your CMOS battery with a new one and after that goto the bios settings and update the time and dare.
After that just save the settings and then check that the warning message is coming or not.

If its coming then it means you need to change the CMOS jumper settings.

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Bios date and time problem

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.
You will need to re-enter the date etc the next time you boot up, but the settings should be retained after that.


Mar 09, 2009 | Dell OPTIPLEX GX150 PIII-1.0GHz 256MB 40GB...

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Hi, and welcome to FixYa
The computer may display a prompt to press F1/F2 or any other key to enter setup each time the computer boots as a reminder on how to enter CMOS. However, if the computer asks to press F1/F2 (or another key) to enter setup and does not continue, this issue can be caused by any of the below possibilities.
1. New hardware has been recently installed.
2. Error or confliction with settings in CMOS.
3. CMOS battery is bad or failing.
New hardware has been recently installed
If new hardware has been recently installed into the computer, it is likely that you are receiving the prompt "Press F1 or F2 to enter setup" because CMOS needs to verify that the new detected hardware is properly being setup in CMOS.

Error or confliction with settings in CMOS
If no new hardware has been added to the computer or the new hardware has been removed and you continue to receive the error, it is likely that there is an error or confliction with the CMOS. Press the key requested to enter setup and verify that all settings are correct. If everything appears to be correct try resetting the CMOS values to the defaults and/or Reset Configuration Data. Additional information about how to do this can be found on document CH000976.
If all settings appear to be correct, save changes and exit CMOS setup. If the error continues to appear, enter setup again and restore all CMOS values to default.
· See our CMOS page for additional help and information with the CMOS.
· Additional information about getting into the CMOS / BIOS setup can be found on document CH000192.
CMOS battery is bad or failing
If you continue to receive the prompt to enter setup each time the computer boots up and you have attempted to follow the above suggestions, it is also possible that the CMOS battery may be bad or failing. Generally; when this occurs, the computer is not holding the time or date correctly. If this is occurring it is recommended that the CMOS battery be replaced.

/Teis the Wiz - -> Vote "FixYa" :-)

Dec 05, 2008 | Computers & Internet

1 Answer

CMOS Settings is Wrong! USB Device over Current Status Detected!


It would seem that you posted twice, pls see you other post.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

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