Keyboard Problems; Lockups And Software Problems; The Computer Does Not Start Up; The Computer Stops Responding - Dell Precision 490 Desktop User Manual

Keyboard Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
Check the keyboard cable —
Ensure that the keyboard cable is firmly connected to the computer.
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Shut down your computer (see
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your computer, and then restart the computer.
Check the cable connector for bent or broken pins and for damaged or frayed cables. Straighten bent pins.
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Remove keyboard extension cables and connect the keyboard directly to the computer.
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Test the keyboard — Connect a properly working keyboard to the computer, and try using the keyboard. If the new keyboard works, the
original keyboard is faulty.
Check for Software and Hardware Conflicts —
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

Check the Diagnostic Lights — See
Ensure that the power cable is firmly connected to the computer and to the electrical outlet

The computer stops responding

NOTICE: You might lose data if you are unable to perform an operating system shutdown.
Turn the computer off — 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. Then restart your computer.

A program stops responding

End the program —
1. Press <Ctrl><Shift><Esc> simultaneously.
2. Click Applications.
3. Click the program that is no longer responding.
4. Click End Task.

A program crashes repeatedly

NOTE: Software usually includes installation instructions in its documentation or on a floppy disk or CD.
Turning Off Your Computer), reconnect the keyboard cable as shown in the Quick Reference Guide for
See Software and Hardware
Diagnostic Lights.
Incompatibilities.