T23: Its showing 3 hours behind.

[upygiki]

I have noticed this a few times. When I remove the battery as well as the AC adapter for a few days, then try to start the T23, windows shows the clock 3 hours behind. I checked the Bios, and it also is 3 hours behind. Suspecting that it was the CMOS battery, I took that out and checked the voltage of it via a multimeter which showed 3.40volts.

If its not the CMOS battery, what else could it be? A bug in the Bios? Bios version is 1.20 (if I remember correctly). I don't get any Bios CMOS errors at startup either. Strange part is that its always exactly 3 hours behind everytime I remove all the power.

Thanks.

[qviri]

Perhaps a silly question, but what is your time zone setting in Windows?

Do the clocks in Windows and the BIOS show the same time?

[Harryc]

Adding to what qviri asked, if you have your OS set up to sync with an NNTP server, and your time zone is wrong, every time it syncs it will change the time to the wrong time zone.

[upygiki]

Do the clocks in Windows and the BIOS show the same time?

I thought I answered that question in the first post but maybe I was unclear. Yes, they both show the same time. If windows was set to a NNTP server, then could windows somehow set the BIOS time too?

I am wondering though, if one was to leave their computer without any power for days, then usually the time does get effected in the BIOS? Maybe its normal behavior?

[nikki605]

I don't use my T21 as much as I used to, so it spends a lot of time powered off and I've never seen it power back up with the clock more than a few seconds slow.

Did you check which time zone you have set in Windows? If your laptop powers up exactly 3 hours behind, it really sounds like a time zone or time server mis-match.

[rkawakami]

If windows was set to a NNTP server, then could windows somehow set the BIOS time too?

Yes, when Windows updates the system time it will also change the clock in BIOS.

I am wondering though, if one was to leave their computer without any power for days, then usually the time does get effected in the BIOS?

If by "any power" you mean the AC adapter and main battery have been removed, then yes, the system still should keep track of the time. There is (or should be) a coin battery that's typically called the CMOS, RTC, BIOS or backup battery inside the battery compartment. That keeps the clock circuit on the motherboard running when all other sources of power have been removed. If it is weak, then that might cause a loss of a few minutes of time but if you are seeing exact hour differences, then I'd blame the time zone setting in Windows as others have pointed out.

[upygiki]

Yes, when Windows updates the system time it will also change the clock in BIOS.

Interesting, I thought windows didn't have access to the BIOS in such a way. I did uncheck the NNTP server, so I'll remove all power and see what happens.

The cmos battery has voltage of 3.40volts or so at the moment.