Dell Precision T7400 Quick Reference Manual page 42

Keyboard Problems
CAUTION:
safety instructions in the
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
then try using the keyboard.
R H
U N T H E A R D W A R E
in your User's Guide.
Lockups and Software Problems
CAUTION:
safety instructions in the
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
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
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
Press <Ctrl><Shift><Esc> simultaneously to access the Task Manager.
1
Click the Applications tab.
2
Click to select the program that is no longer responding.
3
Click End Task.
4
42
Quick Reference Guide
Before you begin any of the procedures in this section, follow the
Product Information Guide
—
— Connect a properly working keyboard to the computer, and
T
R O U B L E S H O O T E R
Before you begin any of the procedures in this section, follow the
Product Information Guide
— See "Diagnostic Lights" on page 26.
— If you are unable to get a response by pressing a key on
—
.
— See "Restoring Your Operating System"
.