Toshiba Satellite P500-BT2G22 User Manual page 133

Real Time Clock battery
The Real Time Clock (RTC) battery provides power for the internal real
time clock and calendar. It also maintains the system configuration.
If the RTC battery becomes completely discharged, the system loses this
data and the real time clock and calendar stop working.
The computer's RTC battery is a lithium ion battery and should be
replaced only by your dealer or by a TOSHIBA service representative. The
battery can explode if not properly replaced, used, handled or disposed of.
Dispose of the battery as required by local ordinances or regulations.
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You can change the settings of the Real Time Clock by pressing F2 in
POST.
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After configuring the time and date for the Real Time Clock battery, we
recommend that you turn the power status of your computer to "ON"
so that the Real Time Clock battery is charged. For details, refer to
Chapter 9, Troubleshooting.
If the following message is displayed on the LCD:
S
The charge in the RTC battery is getting low or has been exhausted. You
will need to set the date and time within the BIOS setup using the following
steps:
1. Press F2 key - the BIOS setup screen will be displayed.
2. Set the date in System Date.
3. Set the time in System Time.
4. Press F10 key. A confirmation message will appear.
5. Press Enter key. BIOS setup will terminate and the computer will be
rebooted.
After configuring the date and time, it is recommended that you switch the
computer on and then leave it in this state so that the Real Time Clock
battery can be charged.
User's Manual
ERROR 0271: Check date and time
settings.
WARNING 0251: System CMOS checksum bad -
Default configuration used.
Press <F1> to resume, <F2> to Setup.
Power and Power-Up Modes
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