Dell Precision R5400 (Mid 2008) - Manual (Page 39)

Troubleshooting
39
Dell Diagnostics
CAUTION:
Before you begin any of the procedures in this section, read and follow
the safety instructions provided with your computer.
When to Use the Dell Diagnostics
If you experience a problem with your computer, perform the checks in
"Troubleshooting Tips" on page 44, and then run the Dell Diagnostics before
contacting Dell for assistance.
Start the Dell Diagnostics from your hard drive or from the Drivers and
Utilities media provided with your computer.
NOTE:
The Drivers and Utilities media is optional and may not ship with your
computer.
NOTE:
The Dell Diagnostics only operate on Dell computers.
Starting the Dell Diagnostics From Your Hard Drive
Before running the Dell Diagnostics, enter the system setup program (see
your
Service Manual on the Dell Support website at support.dell.com ) to
review your computer’s configuration information, and ensure that the device
you want to test is displayed in the system setup program and is active.
The Dell Diagnostics is located on a separate diagnostic utility partition on
your hard drive.
NOTE:
If your computer does not display a screen image, contact Dell (see
"Contacting Dell" on page 71).
1 Ensure that the computer is connected to an electrical outlet that is
known to be working properly.
2 Turn on (or restart) your computer.
3 When the DELL logo appears, press <F12> immediately.
NOTE:
Keyboard failure may result when a key is held down for extended
periods of time. To avoid possible keyboard failure, press and release <F12> in
even intervals to open the Boot Device Menu.
If you wait too long and the operating system logo appears, continue to
wait until you see the Microsoft Windows desktop, and then shut down
your computer and try again.