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Checksum error in bios

Asus m3n78em motherboardhthe computer has been working for a while with bios 0501 for a while but the other day it would not boot. i clreared comos and retried but it came up with bios checksum error and started searching for the bios to reload via floppy or cd or usb.i had the bios on usb and plugged that in and retried but it came up with the same bios checksum error. i then tried with the original cd withe same result. any ideas please

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The actual BIOS file posted on the Gateway site for that model is the incorrect file WARNING....It is actually the Firmware Update for the DVD Player...Bad part is it will update if you force it and override the bad checksum feature in the BIOS Update process. I know, I am currently attemptiing to locate the proper file after incorrect updating by another "professional" tech service that wasn't so professional and didn't realize the Gateway site's mistake myself.

Posted on Jan 19, 2013

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The on-board battery may be bad-try replacing it.

Posted on Jan 12, 2009

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1 Answer

Bad check sum cmos


This error is not the same as a CMOS Checksum Error, which refers to corrupted values of the CMOS settings, the ones you set through the BIOS setup program. This error means the contents of the BIOS code itself are damaged.

The BIOS ROM chip on the motherboard is probably faulty. It could also be another component on the motherboard.

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


If you have reset the CMOS memory you need to go into the BIOS setup screen and reconfigure the BIOS. To do that you need to press a key while the computer is booting. Usually F2 but can be other keys. It should tell you on the bottom of the first screen which key to press to enter BIOS setup.
If you don't know the settings the should be one for optimal defaults - use that one. You will also need to reset the time and date.
Save, Exit and re-boot and everything should then work.

This error is not the same as a CMOS Checksum Error, which refers to corrupted values of the CMOS settings, the ones you set through the BIOS setup program. This error means the contents of the BIOS code itself are damaged.


During the boot process you will see on the screen a certain key to press to enter setup
Press and hold that key during the boot up process to enter BIOS you can load failsafe defaults or load optimized defaults ,press escape then press f10 to save to cmos to restart
You will also need to set the time and date

In the main or system setup screen you should be able to see the date and time Using your arrow keys navigate to the date and change the date. Once highlighted on the month, day, or year, press your arrow keys or your page up / page down keys to change the date.
hope this helps you

Nov 18, 2011 | Toshiba Equium 2000 (PV1065E0-011FR) PC...

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 | PC Desktops

2 Answers

My acer veriton m661 desktop--i cannot set the time,checksum corrupt,possibly flashed with wrong acer bios-acer europe-any fix??


Examine the setup options to see if there's a failsafe mode or a BIOS reset/restore. Otherwise contact Acer tech support to see if they can provide a BIOS reset. You may have to send it to them. Older motherboards had BIOS on a 28-pin socketed chip called an EPROM. These could be ordered from various suppliers with upgrades, etc. I have not seen these in use lately.

Dec 12, 2009 | Acer Veriton M661 PC Desktop

1 Answer

BIOS ROM checksum error


sounds like your bios is corrupted, try going to the motherboard site and update your bios software. It could also be bad memory modules.

Nov 01, 2009 | HP PC Desktops

2 Answers

BIOS ROM Checksum Error - no POST, no beeps, no display -HELP!


If your computer turns on and no display then you have faulty memory cards, replace them with new ones and make sure you use the right kind. Bios settings are usually set to default and factory settings, you should not have to update them. Usually if you hear no beeps when you turn on the computer, then your memory cards are faulty. I hope this helps.

May 11, 2009 | PC Desktops

2 Answers

Cmos checksum bad...usb current status detected system shut down 15 sec


asus manual .pdf bios Version 1301 is the last one what is your version

also does your power supply support 1amp for 5VSB
58bb76e.jpg

Apr 05, 2009 | PC Desktops

2 Answers

Asus motherboard p4dvm bios version 1104 bios checksum error press F1 to setup F2 to load default


achanged the motherboard battery yet, this is the main couse of such a problem.

Dec 04, 2008 | PC Desktops

5 Answers

Bios check sum error


You can try flashing/updating the BIOS if nothing works.

Nov 28, 2008 | PC Desktops

1 Answer

CMOS BAD CHECKSUM


Reseat your ram modules and remove the 2nd hdd
try rebooting
If same thing , then reset the Bios to default ,save and exit
Try again..
If same thing ? assuming you have more then 1 stick of ram,, try booting with 1 stick removed . to eliminate ram modules being bad
then switch ram untill you have verified ram chips are or aren't bad
Hope this helps

Nov 13, 2007 | E-Machines eMachines Desktop PC

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