Dell OptiPlex GX150 - Manual (Page 142)

Removing Front-Panel Inserts —Small Mini-Tower Chassis
1. Open the computer cover to a 45-degree angle and disconnect the optical drive data cable.
2. Open the cover to a 90-degree angle and release the insert tabs from inside the chassis.
3. Press on the insert until it pops free of the front-panel cover.
Replacing Front-Panel Inserts
To replace a front-panel insert, follow the " Removing Front-Panel Inserts " procedures in reverse.
Battery
A 3.0-V CR2032 lithium coin-cell battery installed on the system board maintains system configuration, date, and time information in a special
section of memory.
The operating life of the battery can extend up to ten years. The battery may need replacing if an incorrect time or date is displayed during the boot
routine along with a message such as:
Time-of-day not set - please run SETUP program
or
Invalid configuration information -
please run SETUP program
or
Strike the F1 key to continue,
F2 to run the setup utility
To determine whether you need to replace the battery, reenter the time and date through system setup and exit the program properly to save the
information. Turn off your system and disconnect it from the electrical outlet for a few hours; then reconnect the system, turn it on, and enter system
setup. If the date and time are not correct in system setup, replace your battery.