Question about ASUS M2N-VM DVI - Motherboard - micro ATX - GeForce 7050PV - Socket AM2 - UDMA133, Serial ATA-300

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CMOS Checksum error.

Every time on POST screen CMOS Checksum error happened. and i have to press F1 and then adjust date & time and another settings which i saved earlier. If i rebooting then this problem not occurred. Already i change CMOS battery twice and upgraded to latest Bios Version 0807. But the problem still persists. Please guide me what to do.

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The only thing i can think of is when you changed the battery somehow the board terminals positive negative are not in proper contact with battery
did you try resetting bios by the pins on the motherboard
somewhere on the board is printed bios reset or words to the effect
most times it is a 2 pin connector with a jumper only on 1 pin connect the jumper across both pins remove and try to reboot
hope this helps

Posted on Jul 25, 2008

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Cmos checksum error-defaults loaded


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.

Make sure the battery has plenty charge or remove the battery for a while, about 5 minutes to see if that restores it some motherboards cmos batteries are soldered in

You could check the site for the machine vendor to see if there is a reset jumper.

If that doesn't work then you will need to refresh the BIOS


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 the Delete or 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.
.

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.

Press F10 Save, Exit and re-boot and everything should then work
hope this helps

Aug 03, 2012 | Dell Motherboards

1 Answer

My computer dont display any thing . But when i remove smps supply cmos bettery and ram. Then put in each place to run the computer. And gives cmos checksum error. What i do as that.


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

Apr 29, 2012 | Intel Motherboards

1 Answer

Bios rom checksum error, boot block bios vI.0


Error BIOS ROM CHECKSUM - SYSTEM HALTED.
Cause Bad Hardware
Solution Unfortunately this indicates that your computer BIOS ROM chip or Motherboard is physically bad. It is recommended that you contact your computer manufacturer or take the computer into local service center for repair.
If you wish to repair this issue yourself the motherbard will need to be replaced.
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

Apr 14, 2012 | ASUS A8N-E Motherboard

1 Answer

CMOS Checksum Erro


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

Mar 15, 2012 | Gigabyte GA-8I865GME-775 Motherboard

1 Answer

Cmos checksum bad boots to the splash screen then goes black with a blinking white line tried reseting the jumper cmos no luck load default settings no luck removed psu and battery no luck


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

Oct 08, 2011 | EliteGroup ECS Socket Micro ATX...

1 Answer

When i switch off power and restart the pc i get error 'cmos/gpnv checksum bad' and sometime 'cmos setting wrong press f1 to set defaults or press f2 to enter cmos setup'. I replace the...


sir have you tried clearing the jumper settings. if it still persist remove power supply of board and cmos battery for 5 mins. Then try to startup.

Sep 14, 2011 | Asrock P4I45GV...

1 Answer

Every time I reboot my pc I get the checksum error, all my defaults are loaded and also cant get to the setup


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
click start control panel date and time you can make your adjustments to the date and time from there also right click on the date and time on the bottom toolbar (bottom of screen) you should see Adjust date and time tab
hope this helps you

Sep 14, 2011 | Motherboards

1 Answer

I used jumper bios reset and now gettin bad checksum error. on the mother board writen that K8N rev 1.01 i downloaded k8n motherboard rom file and renamed as k8n.rom and copied to disket. its deleting and...


Hi.

The most probable reason you are getting the bad checksum error is you have to set the date and time because you have cleared the CMOS and reset the BIOS.
You should also get a message that says press F1 to load defaults or press a certain key to access setup. Access setup (BIOS) and set the date and time. That should take care of the bad checksum error.
Another good idea is make sure the motherboard battery is not dead either.



Regards.

Jun 17, 2011 | ASUS Motherboards

2 Answers

Hello, when I put my pc running it says CMOS checksum error press F1 to enter or Del to enter setup, but I press Del when I save changes "save and exit" the computer restarts, but this time...


The Checksum error basically shows that boot settings which were previously set has been changed or reset. This usually happens when the battery loses its charge and thus fail to retain the CMOS settings. This can also be caused by a power surge or a damaged motherboard. But most of the times it would be the battery problem.

You can try replacing the CMOS battery and enter the values back into CMOS or reset values to default. Then switch off and boot up again.
Hope this works. Good Luck. ~SmokinJoe~

Apr 28, 2011 | EliteGroup KM400-M2 Motherboard

1 Answer

I've replaced the battery but checksum error still occurs and F1 is suggested to press for setting time and date


Hi, try this link it has usfull information and help, your problem may well be that your BIOS needs resetting back to default:
http://www.tech-faq.com/cmos-checksum-bad-error.html

Aug 03, 2010 | Mercury P4VM800M7 Motherboard

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