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Cmos checksum error defult loaded dell keyboard not working

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Hello There and Welcome to FixYa.

This has been a common problem for desktops, especially those ones that have been in use for more than a year or so. The error simply states that there is no enough power to "recall" all saved BIOS/CMOS settings during POST (Power On Self Test) - these happens when you turn on your PC.

Every motherboard is equipped with a battery that supplies power to load all saved settings, et al. So simply put, your motherboard's battery needs replacement. As soon as this is done, then the error goes away. Your DELL system was not specified when you posted the problem, so for more information, I recommend that you visit DELL's support page here :

support.dell.com

Hope this helps, and Thank you for using FixYa.

Posted on Mar 17, 2011

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Thanks for this site

Posted on Apr 18, 2011

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Try replacing the CMOS battery. if you already done that step, try going to the BIOS setup of your computer.
-if you don't know how to go to the BIOS, follow these steps:
-turn off the computer completely
-after 10secs, Turn it on again and keep on tapping on F2 (for some Desktops its DEL)
-once you are on the BIOS, you should see something like this:

cmos checksum error defult loaded - mondimondz.jpg

-highlight Load Fail Safe Defaults.. then Press Y
-press F10 to save and exit
-check if you will see that error again

Posted on Mar 17, 2011

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Posted on Jan 02, 2017

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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.

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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 Computers & Internet

1 Answer

Compaq Presario 2500 stopped loading windows XP with a prompt STOP: c0000221 {bad Image Checksum} The image COMCTL32.dll is possibly corrupt. The header checksum does not match the computed checksum.


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 to press delete to enter setup
Press and hold delete 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
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 09, 2011 | Compaq Presario 2100 and 2500 ,NX 9000...

2 Answers

I have a desktop dell I have a problem with my system startup it shows a massage which is (cmos checksum error defult loaded) and I can't press F1 the keyboard also not working so what should i do to...


I think you have a corrupt BIOS, try changing the CMOS battery first of all
if the computer is unusable (you dont get any further than this error) you may have to remove the bios chip and reprogram it with the latest bin file and an eprom programmer.
if the computer is operational, try installing the latest bios by following the instructions upon download.

Mar 17, 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

2 Answers

Came home computer was on black screen and now it won't reboot. When I try to reboot, I get a "cmos checksum error ". Keyboard also isn't working. What could be the problem?


The CMOS checksum error occurs when the CMOS battery is worn out and the CMOS data gets corrupted. Replace the CMOS battery, this battery most likely a CR2032 lithium coin size button battery - check to make sure before you purchase.
After replacing with a new battery, then go to the BIOS configuration and set the Time & Date etc.

Sep 02, 2010 | Gigabyte 7VM400M-RZ (GA-7VM400M-RZ)...

1 Answer

CMOS Error


Are the CMOS batteries good?

Oct 15, 2008 | Biostar P4M80-M4 Motherboard

1 Answer

Cmos checksum error - defaults loaded


Ports are usually labelled - look carefully.
Try manufacturers manual.
Could be that keyboard is the larger 5 pin DIN socket (old IBM AT keyboard).

Aug 10, 2008 | Computers & Internet

1 Answer

CMOS checksum error


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.

Jul 06, 2008 | EliteGroup BKi810 Motherboard

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