View Full Version : Does bios battery need replacing?

07-06-2007, 06:12 PM

I've just build a machine and it boots fine, but if I leave it off for day and turn it on at night , it sounds a long beep and shows this message "Warning system in safe mode, Please r-setting CPU frequency in the cmos setup".
But if I go in to the bios setup and save the setting it fixs it!.
So do you think it points to the battery not keeping the bios settings, during the day when it's off?

Thanks for any help.

07-06-2007, 06:43 PM
When that happens is the time & date wrong?

07-06-2007, 07:15 PM
The time was right 2night, but yesterday I had to change it.

Graham L
07-06-2007, 07:21 PM
Have you checked that the BIOS settings which affect the CPU speed have been correctly set? Someone mentioned in your other thread that it might be set "conservatively", to avoid unwanted overclocking.

Check with your motherboard manual.

But it could well be a button cell with low voltage. Sometimes the clock gives trouble first; sometime the BIOS settings are lost. However, I'd expect to get the checksum error again if the BIOS settings had gone. If the clock has stopped, the time starts from 0:0:0, and the date is usually set to Jan 1 19xx. If that's what you get, change the button cell. If the time is just a bit out ... well, it's a computer, not a clock. :D