Reference Guide

24 System Information Guide
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Installing a Reserve Battery
1 Connect the reserve battery cable to the connector in the reserve battery
compartment.
2 Place the reserve battery in the compartment, and replace the reserve battery cover.
Running the Dell Diagnostics
The Dell Diagnostics is located on a hidden Diagnostic utility partition on your hard drive.
NOTE: If your computer cannot display a screen image, contact Dell (see "Getting Help" in your
User’s Guide for the appropriate contact information).
1
Shut down the computer.
2 If the computer is connected to a docking device (docked), undock it.
See the documentation that came with your docking device for instructions.
3 Connect the computer to an electrical outlet.
NOTE: If you cannot see anything on your display, you can hold down the mute button and press
the power button (instead of F12) to begin the Dell Diagnostics. You do not need to highlight
Diagnostics and press . The computer automatically runs the Pre-boot System
Assessment.