Monitor Problems - Lenovo ThinkCentre Edge 91z User Manual

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.
Select your symptom from the following list:
• "Wrong characters appear on the screen" on page 63
• "The monitor works when you turn on the computer, but goes blank after some period of computer
inactivity" on page 63
• "The monitor works when you turn on the computer, but goes blank when you start some application
programs" on page 63
• "The image appears to be flickering" on page 64
• "The image is discolored" on page 64
Wrong characters appear on the screen
Symptom: Wrong characters appear on the screen.
Action: Have the computer serviced. For details, see Chapter 11 "Getting information, help, and service"
on page 75.
The monitor works when you turn on the computer, but goes blank after some period
of computer inactivity
Symptom: The monitor works when you turn on the computer, but goes blank after some period of computer
inactivity.
Action: The computer is probably set for energy savings with the power-management feature. If the
power-management feature is enabled, disabling it or changing the settings might solve the problem.
If these actions do not correct the problem, run the diagnostic programs (see "Diagnostic programs" on
page 71 for instructions). If you need technical assistance, see Chapter 11 "Getting information, help,
and service" on page 75.
The monitor works when you turn on the computer, but goes blank when you start
some application programs
Symptom: The monitor works when you turn on the computer, but goes blank when you start some
application programs.
Action:
Verify that the necessary device drivers for the application programs are installed. Refer to the documentation
for the affected application program to see if device drivers are required.
.
Chapter 10 Troubleshooting and diagnostics
63