Question about ASUS P4PE Motherboard

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Checksum error at boot up , the message "Checksum error : press F1 to continue or ..." appears. My PC is 5 years old. Could be due to the CMOS Battery that has low voltage? How is it replaced ?

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Open ur system..there u can see a round shape battery on the motherboard..that is CMOS battery..u can replace with a similr one...

Posted on Dec 22, 2008

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Hi robynonis
Yes, definatly the cmos battery. Please make sure you replace with same type battery.
Regards Go-Tech

Posted on Dec 22, 2008

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Cmos checksum erroe defaults loaded


press del to enter setup.then choose default bios setup. then save and exit.pc will restart.

Nov 17, 2011 | Gigabyte GA-945GCMX-S2 Motherboard

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HP Compaq NC6000\r\nWhen I press the power button it seems to start but the only thing I see is numbers going by rapidly in the form of kbytes (524288 KB ok) then it reads 162-system Options not set. Then...


Hi promano67

When you "start" the computer, and the {"Screen"} displays a "Error Message."[CMOS] "error checksum!"

Settings: "Default" loaded.A "checksum error" shows that:

The ("Boot-up Settings "have been changed?"), ie. "Booting OS."

*Boot File 'missing'.

"This can 'occur' if the computer was "shut-down unexpectedly."

Force Shut-down : Power lost; due to 'low battery...'

A ("Power Surge") can cause this 'problem' also.

"What 'happens is that the [CMOS] settings are lost!".
"To fix the problem!"

Do the following:

  • "Restart / Boot the computer.

  • Next, verify if the 'error message' displays?

  • If you are still getting the message?

  • "You will have to "Remove the CMOS battery form the computer!"

  • Shut-down the computer.

  • "Unplug the computer from the {Wall Out-let}.

  • Remove the Lithium battery from the "Notebook."

  • There is a compartment (underneath) the "Notebook that 'store' the CMOS battery."

  • "You will need a {very small Phillips screwdriver}._953.jpg *Remove the CMOS battery for: [30 minutes].

  • !Important: If you have to do it again?

  • Remove the CMOS battery for a {'longer amount of time'}.

  • Replace the "CMOS battery."

  • Next, "Only plug the Power Adapter into the computer.

  • "Do not - replace the "Lithium battery!"

  • Once you have completed these 'task'.

  • "Restart the computer."

  • "Press the [F2] key, to 'enter' the CMOS / BIOS Setup!" _951.jpg

  • Next, 'reset' (all) "Values to the Default Settings."

  • "Press the [F10] key to 'Save' the changes!"

!Important: "Take a 'moment to rate the help', so I can get 'credit' for the work.

Thank you!" - paul7of9







Mar 13, 2011 | HP Compaq nc6000 Notebook

1 Answer

AFTER SWITCHING ON, SCREEN STAYS FROZEN AFTER SAYING CMOS CHECKSUM ERROR- DEFAULTS LOADED


Hi there,

When starting your PC, the following error message is displayed:

CMOS wrong
CMOS MEMORY size WRONG
CMOS Checksum Bad
CMOS checksum error defaults loaded
Warning! CPU has been changed please re-enter cpu settings in the cmos setup and remember to save before quit!
You are prompted to:

Press F1 to resume
Press F2 to load default values and continue


This is due to the fact that the CMOS, which contain data related to the BIOS, has been reinitialized and that your PC has been reset to factory settings.

Solutions:

Reinitializing the BIOS
  • Change BIOS battery
    • If the problem persist this may be due to the fact that the battery powering the CMOS (when the computer is shut down allows the CMOS to store information), is depleted.
    • The CMOS battery is a small pin found on the mother board, you can refer to the manual provided with your motherboard to change it or have the nearby computer technician change it for you if you don't want to risk any damage.
    • More information with: Replacing the battery of your motherboard (CMOS battery)
Post back if it is not working we will be happy to help you.
Hope this helps.
Cheers!!!!

Jan 12, 2011 | Sharp Actius PC-RD10 PC Notebook

1 Answer

Boots to 'CMOSS checksum error'


CMOS checksum errors
Explanation: A checksum is computed as an error-detecting code, to protect the BIOSsettings stored in the CMOS memory.Each time the system is booted this number is recomputed and checked against the storedvalue. If they do not match, an error message is generated to tell you that the CMOSmemory contents may have been corrupted and therefore some settings may be wrong. BIOSesreact in different ways to encountering this sort of error. Some will warn the user andthen continue on with whatever settings were in the CMOS. Others will assume that thesettings that were in the CMOS were corrupted and will load default values stored in theBIOS chip "for safety reasons". The error message will indicate which yoursystem is doing.
Diagnosis: The most common cause of checksum errors in CMOS is a battery that islosing power. Viruses can also affect CMOS settings, and motherboard problems can alsoaffect the stored values.
You should make sure that all of theBIOS settings in the system are correct, by rebooting the system, going into BIOS setupand double-checking all the values (hopefully against a recent BIOS settings backup).
If you have created a backupcopy of your CMOS settings then use them to restore the settings to the correctvalues. To find the problem itself:

Apr 06, 2009 | Intel Motherboard

2 Answers

Bios checksum error. How to solve it?


If you are using an old computer, there’s a possibility that you already encountered this error message during bootup; “CMOS checksum error – Defaults loaded”. At this point, the PC will halt its operation and requires you to press F1 to continue or DEL to enter setup (mostly but also depends on motherboard) to proceed.

This is caused by incorrect or corrupted CMOS values. BIOS settings are stored in CMOS. Each time the system is booted this number is recomputed and checked against the stored value. If they do not match, the error message will be displayed.

For most cases, this is caused by the motherboard battery. Buy a new one to any electronic retailers in your area and replace it. Turn on your computer and press the stated key to enter the BIOS setup. It can be DEL for some or F2 but this depends on your computer. On the BIOS menu, try to change the DATE and TIME settings because their values are reset to different value. Most settings are set to default so leave it as it is. Save the settings and reboot your computer.

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I just had the CMOS checksum error while starting the computer, So pressed F1 and continued.. I just don't think it's the battery, because the computer is 2-3 months old, and all parts were new. I also have another problem. which is that it tells me at start upo the the IDE 80 connector cable isn't installed, or something like that, which prevents one of my hard drives to be found by windows....

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5 Answers

Bad BIOS checksum.... CMOS bad checksum errors


BOOT BLOCK COMPATIBLE VERSION VER .005
BAD BIOS CHECKSUM

CHECKING FOR CD ROM
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
NO CD-ROM FOUND
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READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
NO FLOPPY DISK FOUND

Does someone already fix this problem??????

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