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5. Reconnect the mouse cable to the computer.
6. Turn your computer back on.
The pointer on the screen does not move smoothly with the mouse
Symptom: The pointer on the screen does not move smoothly with the mouse.
Action: Erratic movement of the mouse pointer is generally caused by a buildup of dirt, oils, and other
contaminants on the ball inside the mouse. Clean the mouse. See “Optical mouse” on page 43 for
instructions.
The ngerprint reader does not work
Symptom: The ngerprint reader does not work.
Action: The following could cause the ngerprint reader not to operate properly:
• Not enrolling your ngerprint correctly.
• Scratching the surface of the reader with a hard, pointed object.
• Scraping the surface of the reader with your nail or anything hard.
• Using or touching the reader with a dirty nger.
• The surface of your nger is very different from when you enrolled your ngerprint.
The wireless keyboard does not work
Symptom: The wireless keyboard does not work.
Action: If the Transceiver Communications LED is on and the wireless Keyboard does not work, restart your
computer. If restarting your computer does not solve the problem, verify that the following conditions are met:
• The batteries are properly installed.
• The batteries still retain their current.
• The wireless Keyboard is located less than ten meters away from the transceiver.
• The transceiver is fully installed.
Action: If the Transceiver Communications LED is not on, reconnect the transceiver and the keyboard.
Monitor problems
Note: Many monitors have status-indicator lights and built-in controls for adjusting brightness, contrast,
width, height, and other picture adjustments. However, the controls vary from monitor type to monitor type.
For information about the status lights and using the controls, refer to the documentation that comes
with your monitor.
Select your symptom from the following list:
• “Wrong characters appear on the screen” on page 45
• “The monitor works when you turn on the computer, but goes blank after some period of computer
inactivity” on page 45
• “The monitor works when you turn on the computer, but goes blank when you start some application
programs” on page 45
• “The image appears to be ickering” on page 45
• “The image is discolored” on page 46
44 ThinkCentre E73z Hardware Maintenance Manual