CMOS Checksum invalid?

Hello guys,

If anyone can recall my previous post, I mentioned that the clock on my Windows 7 is perpetually incorrect.

I was advised to configured the BIOS clock which I did.

However, whenever I change the time and date to the correct one, I will get this CMOS checksum invalid error when I start up my computer.

Is it a sign that my laptop is faulty? I actually just got this DV6 less than 3 months ago. And this error seemed to happen after I did a clean install of the laptop.

Pls advise. If need be, I will have to go down to HP for them to do a repair.

 

Have you tried upgrading the BIOS to the latest?

 

Yes I did, doesn't seem to work though.

What's the problem!

 

It sounds like the CMOS/BIOS battery that is on the motherboard may be bad.

Have you tried calling HP tech support or running HP diagnostics?

 

How much is it incorrect. Does it reset at every boot?

 

I second this it sounds like the cmos battery

 

Ok, I ran a memory test through the BIOS setup menu during startup.

The result was a 'pass'.

The clock seems to always start on 12am on 1.1.2010. Not sure why. Whenever I configure the clock through the BIOS, I would always get this menu about 'token invalid' or something like that on my desktop. Also some of the icons on my desktop at the bottom right would be missing.

Shasta, does that mean I should bring my notebook to HP?

 

Hmmm let me recall.

The clock would be wrong.
I go to BIOS and configures it back to correct time and date.
I startup to receive some error (refer to above post).
The next time I on it, I get the invalid check sum error, and a 'press enter to restart' option.
I restart it, and the clock is wrong again.

As to whether it reset at every boot, I don't think so. Sometimes when I change the BIOS clock, I won't get a problem for the next two restarts. Perhaps on the third one, I would get this error.

 

Sounds exactly like a dead or near dead cmos battery. Clock (and other bios settings) reset to defaults.

It might be visible if you open memory/hdd covers. Type is usually CR2032 clock battery found in most stores. If it's visible, you should be able to replace it yourself. Pop old out and slide new one in.

 

Does anyone know how to remove the cmos battery?

I took out the lid and the cmos battery is partially blocked by a plastic shield that holds everything in place. I can't pry it out.

Any help?

 

look up your manual it will tell you how
here is a video from a dv6000
Steps for Removing and Replacing the Real-Time Clock Battery HP Pavilion dv6000 CTO Notebook PC - HP Customer Care (United States - English)