Manual

7-6 Installation and Troubleshooting Guide
longer). You may need to replace the battery if an incorrect time or date is displayed
during the boot routine along with the following or similar message:
Time-of-day not set -- please run SETUP program
Strike the F1 key to continue, F2 to run the setup utility
or
System CMOS checksum bad -- Run SETUP
Strike the F1 key to continue, F2 to run the setup utility
or
Invalid configuration information -- please run SETUP program
Strike the F1 key to continue, F2 to run the setup utility
To determine if the battery needs replacing, reenter the time and date through the
System Setup program. Turn off and disconnect the system from the electrical outlet
for a few hours, and then reconnect and turn the system on again. Enter the System
Setup program. If the date and time are not correct in the System Setup program,
replace the battery.
NOTES: Some software may cause the system time to speed up or slow down. If the
system seems to operate normally except for the time kept in the System Setup pro-
gram, the problem may be caused by software rather than by a defective battery.
If the system is turned off for long periods of time (for weeks or months), the NVRAM
may lose its system configuration information. This situation is not caused by a defec-
tive battery.
You can operate the system without a battery; however, the system configuration
information maintained by the battery in NVRAM is erased each time you shut down
the system. Therefore, you must reenter the system configuration information and
reset the options each time the system boots until you replace the battery.
The battery is a 3.0-volt (V), coin-cell CR2032-type battery. To remove the battery, per-
form the following steps.
WARNING: Before you perform this procedure, you must turn off the system
and disconnect it from its AC power source. For more information, see
“Safety First—For You and Your System” in Chapter 6.
CAUTION: There is a danger of a new battery exploding if it is incorrectly
installed. Replace the battery only with the same or equivalent type recom-
mended by the manufacturer. Discard used batteries according to the
manufacturer’s instructions.
1. Enter the System Setup program and, if possible, make a printed copy of the Sys-
tem Setup screens.
See Chapter 3, “Using the System Setup Program,” in the
User's Guide for
instructions.
2. Shut down the system, including any attached peripherals, and disconnect the
system from the electrical outlet.
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