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First thing to do would be to try replacing the battery. If the problem persists there may be a problem with the charging circuitry in the laptop itself. If you need further assistance please let me know. Thank you, lee
This is the bios battery which back up the clock and settings and it is normally found on the main motherboard accessable from the rear of the laptop from the memory card opening.
so remove and fix the 3 volt battery into the slot.
The CMOS battery is responsible for the internal clock. If it automatically resets itself to 2002 (motherboard manufacturing date) then you need to have it replaced (it's really cheap to have it replaced).
The slide on/off switch is for your internal wireless card. It must be on if you intend to connect to a wireless network, otherwise you can leave it off to save battery power.
To tell the approximate battery life left on the unit, click on the battery icon next to the clock when you are running on batteries. It will tell you what percentage and the approximate time left of the battery.
Thanks and please take a moment to give this solution a rating of fixya.
there is a problem with the cmos, it needs to cleared and a new cmos battery also, if the batterys dead it can't remember the date, if its stuck on the time and date the cmos needs clearing so it can boot