Ref GA-81PE1000L Error message on boot up

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

Hello
Take out the memory sticks.Unplug pc first. Then Clear c mos. Put memory sticks back in one at a time.

Reboot on each stick.May be a bad memory stick.

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}. *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!"
  

• 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

CMOS checksum errors
Explanation: A checksum is computed as an error-detecting code, to protect the BIOS settings stored in the CMOS memory. Each time the system is booted this number is recomputed and checked against the stored value. If they do not match, an error message is generated to tell you that the CMOS memory contents may have been corrupted and therefore some settings may be wrong. BIOSes react in different ways to encountering this sort of error. Some will warn the user and then continue on with whatever settings were in the CMOS. Others will assume that the settings that were in the CMOS were corrupted and will load default values stored in the BIOS chip "for safety reasons". The error message will indicate which your system is doing.
Diagnosis: The most common cause of checksum errors in CMOS is a battery that is losing power. Viruses can also affect CMOS settings, and motherboard problems can also affect the stored values.
Recommendation: Follow the instructions in this section to address the CMOS corruption. You should make sure that all of the BIOS settings in the system are correct, by rebooting the system, going into BIOS setup and double-checking all the values (hopefully against a recent BIOS settings backup).

replace the cmos battery into new one that is specified the exact volt..hope this helpful...

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:

• Troubleshoot the battery to make sure that it is not causing the problem.
• Make sure that you scan the system for viruses. Viruses can corrupt the CMOS memory (although they cannot reside in it).
• Troubleshoot the motherboard. Motherboard problems can sometimes (rarely) result in CMOS corruption.check the sata connector if applicable
  
• Troubleshoot your power supply. A failing supply can lead to problems with the whole system, and especially motherboard components.

Are the CMOS batteries good?

rahul23petit

"CMOS" checksum error default loaded" means ur mother board cmos battery fail (which is locate at mother board), to solve this problem replace it by new one (u can buy it form any computer accessories shop). all oher problem happen for it.

Replace the CMOS battery that is busted. after replacing configure in bios setup and load bios setup default.

If your CMOS batt is ok, then try flashing your BIOS