Keyboard Problems; Lockups And Software Problems; The Computer Does Not Start Up; The Computer Stops Responding - Dell OptiPlex 755 User Manual

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N S E R T B O O T A B L E M E D I A
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O N S YS T E M D I S K E R R O R
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O T E N O U G H M E M O R Y O R R E S O U R C E S
the program that you want to use. In some cases, you may have to restart your computer to restore computer
resources. If so, run the program that you want to use first.
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P E R A T I N G S YS T E M N O T F O U N D

Keyboard Problems

CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions in the
Information Guide
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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 "Before Working Inside Your Computer" on page 21), 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.
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E S T T H E K E Y B O A R D
R H
U N T H E A R D W A R E
®
Microsoft Windows

Lockups and Software Problems

CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions in the
Information Guide

The computer does not start up

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H E C K T H E D I A G N O S T I C L I G H T S
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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.
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U R N T H E C O M P U T E R O F F
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.
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Click the Applications tab.
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336
Solving Problems
— Insert a bootable floppy disk, CD, or DVD.
— Remove the floppy disk from the floppy drive and restart your computer.
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L O S E S O M E P R O G R A M S A N D T R Y A G A I N
— Contact Dell (see "Contacting Dell" on page 370).
.
—
— Connect a properly working keyboard to the computer, then try using the keyboard.
T — See "Troubleshooting Software and Hardware Problems in the
R O U B L E S H O O T E R
®
XP and Microsoft Windows Vista
.
— See "Diagnostic Lights
— If you are unable to get a response by pressing a key on your keyboard or moving your
®
" on page 358
Operating Systems
" on page 347
.
— Close all windows and open
Product
.
Product