Question about Evga nForce 680i SLI (122CKNF68) Motherboard

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Checksum error/defaults loaded

Evga 6801 started to show checksum error /loading defaults have flashed bios same prob...also reset button does not reboot anymore .halts at c3with the checsum error it says to check cpu/mem

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  • xmanz Mar 09, 2009

    oh by the way sometimes it wont post from cold boot thanx

  • xmanz Mar 10, 2009

    that was almost my next question how do i check if its the battery?
    i hope it something as simple as this...it was running sweet for a long time o/c to 3.6..no problems


  • Stephen Scheneman
    Stephen Scheneman May 11, 2010

    Have you tested the CMOS battery to be sure it is holding your configuration information?

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The easiest way to check the battery is to change it out. If you don't have a battery to replace it with, and you do have a multi-meter, you can test the voltage coming from the battery...it should be 3v (or very close). If you need help changing the batter, just post your questions.

Posted on Mar 10, 2009

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Change the CMOS battery..

Posted on Mar 10, 2009

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1 Answer

Floppy disk fail (40) CMOS Checksum Error Defaults Loaded & Keyboard Unresponsive


Unplug the floppy drive cable from the motherboard and test.
Problem still there??
Check the leads of the 3 integrated circuits starting with the one directly to the right of the LAN connectors, and working down and to the left to the other integrated circuits.
The problem you are looking for is two leads shorted together or a lead broken by somebody who was careless with a card, and hit the IC during assembly.
There can also be a short caused by trash or loose components, but that is not as common.

Oct 06, 2015 | Biostar 945GC-M7 TE Motherboard - v6.0,...

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Dell Inspiron 530. At start up gives CMOS checksum error defaults loaded. Options press F1, F2 or F12 computer does not react. Has new CMOS battery. RAM OK. Did CMOS clear and password reset. What else can...


When a Power Supply is plugged into power, there is a constant 5 Volts present. The 5 Volt Standby Power.

You press the Power On button.
This in turn presses against the Power On switch, located inside it's plastic assembly.

The Power On switch is a Momentary Contact Switch.
Temporary closing it activates the Soft Power On circuit.
A 5 Volt circuit that utilizes the 5 Volt Standby Power.

The Soft Power On circuit 'excites' the Power Supply, and turns it on.
(Sounds like a seedy novel)

The first chipset (Integrated Circuit) to receive power is the BIOS chipset.
The Basic Input/Output System program is initialized.

BIOS looks to see what devices are connected, does a Ram Memory count, turns the Processor on, and hands the computer over to the Operating System.

A checksum is computed as an error-detecting code, to protect the BIOS settings stored in CMOS.
Each time the computer is turned on, this number is re-computed; and checked against stored values.

If they do not match an error message is generated, to tell you the CMOS memory contents may have been corrupted; and therefore some settings may be wrong.
Your BIOS assumed the settings were incorrect, and loaded BIOS default settings; stored in BIOS.

(Default = factory settings)

CMOS Checksum Error Defaults - Loaded

New battery? Nope didn't help.
Clear CMOS, and password reset? Nope didn't help.

Leaves Virus as the problem, or hardware component/s on motherboard; are bad.

My thoughts?
Bad motherboard.

("BAD motherboard. NO,...........you know you have been bad,....don't give me that look. You're a bad motherboard."

Lol!)

That's my diagnosis.


(Unless you put the CMOS battery in upside down.
+ goes UP)

Regards,
joecoolvette

Mar 17, 2013 | Dell Motherboards

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

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

Checksum error, pc clock returning at jan 1, 2004


flashing BIOS is not needed in your case. The only way to solve your issue is to make the mobo work. When working, thats the time you can use utilities to flash your BIOS.
For now, visit your CMOS Setup by pressing DEL or F2 at startup. Then choose LOAD SETUP Defaults.

Oct 09, 2009 | Foxconn 661FX4MR-ES Motherboard

2 Answers

Computer problem


the problems happens when u power off the system directly,
this is located in the CMOS of the motherboard not in HDD

Feb 19, 2008 | Motherboards

6 Answers

CMOS Error


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

Jan 24, 2008 | Mercury P4VM800M7 Motherboard

1 Answer

Cmos checksum error after flashing the bios


I had a similar experience after upgrading my RAM. When you reset your CMOS and have default settings maybe you should check if your RAM timings are correct. I could not get mine to load with both sticks in until I fixed the timings from the default settings.

Jan 20, 2008 | MSI K9VGM-V Motherboard

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