[sartaj]

m having problem during the booting of my system... it shows the error...
BAD CHECKSUM ERROR
CMOS/GNPV DATE/TIME NOT SET

press<F4> to run setup...

[cwwozniak]

Hi sartaj and welcome to TSG.

Sounds like you have corrupted settings in your BIOS configuration (More information about half way down on this page on the MS web site.)

What happens when you press the F4 function key?

[Jack Hackett]

Could be the sign that the BIOS battery no longer has enough power in it, time for a new one perhaps
http://www.liverepair.com/encycloped...mosreplace.asp

[sartaj]

when i press F4 key it enters into the bios and system start working properly......... but problem is, i have to reset the machine 3-4 times before booting up normally..... it doesnt boot up in a single attempt..... what shud i do.... i removed my battery and reinserted it.... but still d same problem...

[mrss]

A new battery is 3-4 dollars and available in places that sell camera/watch batteries. I agree with the earlier post which said to replace the battery.

There are usually two chips that hold the BIOS/boot settings. One is permanent storage holding the default data and the other runs off the battery and holds the user selectable info, including the time. Removing the battery erases that stuff for a clean boot, but a weak battery allows the data to go corrupt.

[sartaj]

ok.......... can u tell me y derz is problem in booting the system i.e. i try 6-7 times to restart the machine but it does nt boot and by tryin number of times it boots up normallly...

[Jack Hackett]

the reason is because the BIOS battery is dead thus it doesnt have enough power in it for the BIOS to keep it's settings.
Replace the BIOS battery