Keyboard Problems; Lockups And Software Problems - Dell Vostro 420 Service Manual

1. Click Start and click Control Panel.
2. Under Pick a Category, click Performance and Maintenance® System® System Properties ® Hardware® Device Manager.
Windows Vista:
1. Click Start
2. Click Device Manager.
If your IEEE 1394 device is listed, Windows recognizes the device.
If you have problems with a Dell IEEE 1394 device —
If you have problems with an IEEE 1394 device not provided by Dell —

Keyboard Problems

CAUTION:
safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Check the keyboard cable —
Ensure that the keyboard cable is firmly connected to the computer.
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Shut down the computer (see
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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.
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Remove any keyboard extension cables and connect the keyboard directly to the computer.
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Test the keyboard —
Run the Hardware Troubleshooter —

Lockups and Software Problems

CAUTION:
safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
The computer does not start up
Check the diagnostic lights —
Ensure that the power cable is firmly connected to the computer and to the electrical outlet
The computer stops responding
NOTICE:
Turn the computer off —
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 <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.
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® Control Panel® Hardware and Sound.
Before you begin any of the procedures in this section, follow the safety instructions that shipped with your computer. For additional
Before Working on Your
Connect a properly working keyboard to the computer, and then try using the keyboard.
See Hardware Troubleshooter.
Before you begin any of the procedures in this section, follow the safety instructions that shipped with your computer. For additional
See Power Lights.
You may lose data if you are unable to perform an operating system shutdown.
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
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Contact Dell (see Contacting Dell).
Contact the IEEE 1394 device manufacturer.
Computer), reconnect the keyboard cable as shown on the setup diagram for your computer, and