Question about E-Machines T2682 (000002965) PC Desktop

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Cmos checksum error 0251

E machines T2682 has system error 0251 CMOS checksum bad

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Just replace the "CR2032 battery" in the motherboard... the enter the BIOS, then "LOAD SETUP DEFUALT"

Posted on May 18, 2009

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I have recently updated the system bios it's successfully upgraded but the problem is its giving CMOS Checksum bad error please I yesterday buy the system


Hi.

Exist some problems that can cause that:

1- The CMOS battery. Solution: Change it for a new one.
2- Some problem with the time specifications in the BIOS.
3- Some drive that isn't connected properly.

Mar 01, 2013 | Radio Communications

1 Answer

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

Cmos checksum error & keyboard not function


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).

Sep 24, 2010 | Computers & Internet

1 Answer

Booting problem


There are usually three main reasons that a CMOS Checksum Bad Error has occurred. They include:
  • CMOS Battery may not be functioning properly. The battery life may have expired.
  • Your BIOS may have been updated (either by user or possibly a virus)
  • The computer may not have been shut down properly e.g. shutting off the computer's main power without first shutting down the computer (MS Windows requires you to shut down your computer before shutting off the power).
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

Mar 05, 2010 | Microsoft Windows XP Professional With...

2 Answers

IBM Thinkpad will not hold date & time.


Replace the backup battery and run BIOS Setup Utility to reset the time and date. This will resolve the issue.

Sep 15, 2009 | IBM ThinkPad T22 2647 Notebook

1 Answer

Got this error message WARNING 0251: system CMOS checksum bad. Default configuration used. Then everything went black. Can't find the wireless network (altho it IS working on other computer in the...


this sounds like a bad flash, when you went to update the laptop did you happen to download any bios firmware updates? if so it;s a bad flash and will need to be reflashed to fix it.

Aug 22, 2009 | Gateway M320 XL Notebook

2 Answers

Intel 102ggc:The Firmware has detected that Cmos Checksum Error


Hi there.
Basically you first bios update was bad, if you can get into the operating system re-flash the bios again, that will sort it out.

Good luck and thanks for choosing FixYa!!

Jun 02, 2009 | Microsoft Windows XP Professional Upgrade...

2 Answers

CMOS CHECKSUM BAD USB DEVICE OVER CURRENT STATUS DETECTED SYSTEM WILL SHUT DOWN IN 15 SECS there is no shortcircuit in usb header 5v is ok i also upgrade bios but it did not solve this error


easy......cmos checksum bad =

dead battery ...buy a new cmos battery for £2 ..make sure you install correct way up...

from any pc shop or ebay...

you will have to reset date /time in bios afterwards...f2 or delete usually to enter bios settings..
regards tonster

Apr 05, 2009 | ASUS P5RD2-VM Motherboard

2 Answers

Boot problem


thanks for your reply i have replaced the battery with a new one and the same problem still exists... why does it not boot from power button?

Feb 03, 2008 | E-Machines eMachines Desktop PC

1 Answer

Bios


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

Feb 01, 2008 | E-Machines eMachines Desktop PC

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