Dell Precision T7400 DCDO, Quick Reference Manual

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42
Quick Reference Guide
Keyboard Problems
CAUTION:
Before you begin any of the procedures in this section, follow the
safety instructions in the
Product Information Guide
.
C
H E C K T H E K E Y B O A R D C A B L E
—
• Ensure that the keyboard cable is firmly connected to the computer.
• Shut down the computer (see "Turning Off Your Computer" in your
User’s Guide ),
reconnect the keyboard cable as shown on the setup diagram for your computer, and
then restart the computer.
• Ensure that the cable is not damaged or frayed and check cable connectors for bent or
broken pins. Straighten any bent pins.
• Remove any keyboard extension cables and connect the keyboard directly to the computer.
T
E S T T H E K E Y B O A R D
—
Connect a properly working keyboard to the computer, and
then try using the keyboard.
R
U N T H E
H
A R D W A R E
T
R O U B L E S H O O T E R
—
See "Restoring Your Operating System"
in your User’s Guide .
Lockups and Software Problems
CAUTION:
Before you begin any of the procedures in this section, follow the
safety instructions in the Product Information Guide .
The computer does not start up
C
H E C K T H E D I A G N O S T I C L I G H T S
—
See "Diagnostic Lights" on page 26.
E
N S U R E T H A T T H E P O W E R C A B L E I S F I R M L Y C O N N E C T E D T O T H E C O M P U T E R A N D T O
T H E E L E C T R I C A L O U T L E T
The computer stops responding
NOTICE:
You may lose data if you are unable to perform an operating system shutdown.
T
U R N T H E C O M P U T E R O F F
— If you are unable to get a response by pressing a key on
your keyboard or moving your mouse, press and hold the power button for at least
8 to 10 seconds (until the computer turns off), and then restart your computer.
A program stops responding
E
N D T H E P R O G R A M
—
1
Press <Ctrl><Shift><Esc> simultaneously to access the Task Manager.
2
Click the Applications tab.
3
Click to select the program that is no longer responding.
4
Click End Task .