Dell OptiPlex 760 - Manual (Page 172)

If you have problems with a Dell IEEE 1394 device —
Contact Dell (see Contacting Dell ).
If you have problems with an IEEE 1394 device not provided by Dell — Contact the IEEE 1394 device manufacturer.
Keyboard Problems
Check the keyboard cable —
l Ensure that the keyboard cable is firmly connected to the computer.
l Shut down the computer (see Before Working on Your Computer ), reconnect the keyboard cable as shown on the setup diagram for your computer, and
then restart the computer.
l Ensure that the cable is not damaged or frayed and check cable connectors for bent or broken pins. Straighten any bent pins.
l Remove any keyboard extension cables and connect the keyboard directly to the computer.
Test the keyboard — Connect a properly working keyboard to the computer, then try using the keyboard.
Run the Hardware Troubleshooter —
See Hardware Troubleshooter .
Lockups and Software Problems
The computer does not start up
Check the diagnostic lights —
See Diagnostic Lights .
Ensure that the power cable is firmly connected to the computer and to the electrical outlet
The computer stops responding
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), and then restart your computer.
A program stops responding
End the program —
1. Press 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.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage on www.dell.com at www.dell.com/regulatory_compliance.
CAUTION: You may lose data if you are unable to perform an operating system shutdown.