Laptop User Manual

100 Troubleshooting
Starting the Dell Diagnostics From Your Hard Drive
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
"Contacting Dell" on page 177).
NOTE: If the computer is connected to a docking device (docked), undock it. See
the documentation that came with your docking device for instructions.
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 Start the Dell Diagnostics in one of the following two ways:
a When the DELL™ logo appears, press <F12> immediately. Select
Diagnostics from the boot menu, and then press <Enter>.
NOTE: If you wait too long and the operating system logo appears, continue
to wait until you see the Microsoft
®
Windows
®
desktop, then shut down your
computer and try again.
NOTE: Before attempting option B, the computer must be powered down
completely.
b
Press and hold the <Fn> key while powering the computer on.
NOTE: If you see a message stating that no diagnostics utility partition has
been found, run the Dell Diagnostics from your Drivers and Utilities media.
The computer runs the Pre-boot System Assessment, a series of initial
tests of your system board, keyboard, hard drive, and display.
• During the assessment, answer any questions that appear.
• If a failure is detected, the computer stops and beeps. To stop the
assessment and restart the computer, press <n>; to continue to the
next test, press <y>; to retest the component that failed, press <r>.
• If failures are detected during the Pre-boot System Assessment, write
down the error code(s) and contact Dell.
If the Pre-boot System Assessment completes successfully, you receive the
message
Booting Dell Diagnostic Utility Partition.
Press any key to continue
.
4 Press any key to start the Dell Diagnostics from the diagnostics utility
partition on your hard drive.