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Cmos checksum error

I received a error "secondary ide channel no 80 conductor cable installed." I inspected the cable... it's ok. I think it may be the bios... I want to try to remove the battery, but I'm not sure where the battery is.... would it be about the size of nickel located on the other side of the mb from the bios?? any other suggestions? T HANKS!

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That warning (and it's just a warning) is telling you that the IDE port can handle an 80-pin cable, but you've only got the standard 40-pin cable attached. There is no problem, but that message will always come up unless you use the faster cable. (cheap item)

The title says something about a CMOS checksum error, so i'll answer that too. That usually happens when someone has reset the BIOS back to defaults either by shorting the reset pins or by removing the battery (which looks exactly like you described).

You'll probably want to go into the BIOS and set things back up... date and time etc.

Posted on Aug 22, 2008

  • Steve Rand
    Steve Rand Aug 22, 2008

    Oh, and if you don't use one of the IDE channels, you can disable it in the BIOS. That might very well supress that message. If you got the CMOS error before you removed the battery, then it's likely that the battery is flat and needs to be replaced. (DIY) =-]



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1 Answer

How to install 80 conductor cable? because when i turn on my computer it displays no 80 conductor cable installed

It means you're still using the 40 conductor cable from the MB IDE to the
hard drive. The 80 Conductor Cables are used to take advantage of the newer
Ultra/ATA-66 and up IDE drives. (They will still work with the 40
conductor cable, but slower.)

Jun 01, 2010 | Microsoft Computers & Internet

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Secondary IDE channel not working...

have you tried flashing the BIOS version? I don't know if this is just a problem out of the blue, or you just got the motherboard and it's always been like this. I know usually the manufacturer releases new version for the BIOS and you can use a flash utility to upgrade it and it could fix the problem. Have you tried using another operating system to see if it works in Linux (Ubuntu)? If it works in Linux, then you know it's a windows related problem. If it doesn't work there, then it's probably the BIOS version is outdated.

Jan 02, 2010 | Gigabyte GA-8SIML Motherboard

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Whats the difference between a a 40 conductor and a 80 conductor on a ide cable

80 conductor IDE wires are designed to reduce interference and other signaling problems associated with higher-speed transfers.

Nov 17, 2009 | Computers & Internet

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How to replace the hard drive in a Twinhead n222s

Find out what kind you have - serial or IDE, get your replacement.

Remove the cover of the computer. Observe static electricity precautions. Find the hard drive. Confirm it is a serial or IDE type drive (IDE has a 40/80 conductor cable about 1 1/2 inches wide - serial cable is about 1/2 inch wide. Dont confuse with the power cable which is a Molex plug.)

Remove 2 or 4 screws if rail mounted. Unlatch if other style. Unplug the cables - check the pin outs - reinstall and get ready for the fun. (you may want to use the old drive - see below. If you are Cable Select (80 conductor wire) the master will be located at the end of the IDE and the slave will be in the middle. If serial, you will have to read the manufacturers direction.)

You willhave to use the manufacturers supplied software to prepare your new drive to receive information. When that is done, you are ready to reload the operating system. You do still have the key right??? No key - don't do this at all. You may be able to use your existing drive as "D" or as a slave (secondary if you prefer) ... to get your old files off or store your new files. All kinds of possibilities are opened to you with a second drive.

Have fun and good luck with your project.

We volunteers are paid with "bragging rights" if this response pleases you please leave positive comments.



Oct 12, 2009 | Computers & Internet

1 Answer

Ide channels not working right after updating dvdrw firmware Set on ide channels should be Primary ide Hard drive primary master. Primary secondary hard drive. Secondary master dvd (read only) Secondary...

usually when you update or re-flash the dvd rom.
it will state :- ensure that the drive to be flashed should be jumper set as master. if there were other drives connected to the same ide channel. this could have caused damage to the other drives connected. Or the IDE Channels themselves.
The only suggestion I have for you. is to remove all the drives. disconnect the power from the computer. and remove the cmos battery, for 10-15 seconds. resetting the computers bios back to defaults. then re-settup the drives ensuring that the jumpers are correct for each drive. i.e 1 slave and 1 master on each ide cable.
Mike @ Compurepair.

Mar 26, 2009 | ASUS A7V8X Motherboard

1 Answer

More problems lol

Hy Ashley,

First up,
Your channel 1 no 80 conductor cable,
tell me that you have mounted a new HDD to your computer,
- -
If there isn't a 80 wire cable, then the drive that came with the box was not a speedy one.
If you only have a 40 wire cable the drive will be limited to 33MB/s transfer versus 100 or 133MB/s that's possible with the 80 wire cable.

With the 40's, all the wires are signal carriers (potentially). With the 80's, there is a ground wire between each signal wire to prevent bleed over. Bleed over can affect signal integrity, cause errors, and slow down performance.

you can fix that in one of two ways(or maybe both):-):

1. Go into your BIOS, and set it to run the hard drive auto detection to make sure its not holding on to any old hard drive settings.

2. Make sure that all connections are tight. You might want to try a different cable and if you do make sure it is the 80 wire type. The connectors on the 80 wire are colored (black,blue and gray)

The part with it telling you about your CPU is just a part of the testing procedure.

kind regards
remember to vote

Dec 12, 2008 | Computers & Internet

1 Answer


Hello Benjamin2663,

Your error could be several things, but here is what to do to make it work....Listed in order so do them and then see if you get the error and if you do then do the next fix....

Load the set up defaults in the BIOS Setup. This may get it all to work.

Use an 80-conductor cable connected in the Primary IDE socket on the motherboard with the other end connected to the hard disk. You see you may be using an old type of cable and/or it may be connected to the secondary IDE channel. Installing the right cable in right socket will solve your problem.

Double check your cables and jumper settings. As long as you have confirmed them to be in their
correct positions, you go straight to the BIOS and enable Smart Drive capability for your hard drive.

Set all your drives to be Auto detected and reboot the PC.

IF the message and problem still appear you must now go to Device Manager and go to System. Open Systems and go to IDE ATA/ATAPI Controllers, and you will now see primary and secondary channels. Click on the primary channel first and open the properties box.

Next go to the advanced settings and make sure the transfer modes on device 0 and device 1 are set to DMA if available. Do the same for the secondary channel as well and allow the PC to reboot.

If all that fails, go and have your motherboard checked out for faults.

Hope this help you.

Sep 12, 2008 | Intel Motherboard

1 Answer

MS 6712 motherboard

check the cables, and if all connection pins are on the drives or on the motherboard. Not all the needed communication routs between the drives and the motherboard are working....
U can also try another IDE slot (if more than 1)
If all checks ok, try a BIOS reset... (but most probably is just the cables ...)

Jan 20, 2008 | Intel Motherboard

1 Answer


I just had the CMOS checksum error while starting the computer, So pressed F1 and continued.. I just don't think it's the battery, because the computer is 2-3 months old, and all parts were new. I also have another problem. which is that it tells me at start upo the the IDE 80 connector cable isn't installed, or something like that, which prevents one of my hard drives to be found by windows....

Dec 18, 2007 | EliteGroup K7AMA Motherboard

1 Answer


Check your Ide data cable it seems 40 pin conductor cable .

Replace them with 80 pin conductor cable.your problen\m has gone.

Oct 13, 2007 | MSI P4MAM2-V Motherboard

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