Lenovo ThinkCentre Edge 71 (English) User Guide - Page 101
of computer inactivity, Wrong characters appear on the screen
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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 89 • "The monitor works when you turn on the computer, but goes blank after some period of computer inactivity" on page 89 • "The monitor works when you turn on the computer, but goes blank when you start some application programs" on page 89 • "The image appears to be flickering" on page 89 • "The image is discolored" on page 90 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 101. 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 97 for instructions). If you need technical assistance, see Chapter 11 "Getting information, help, and service" on page 101. 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. Actions: • Make sure the monitor signal cable is securely connected to the monitor and the monitor connector on the computer. A loose cable can cause intermittent problems. • 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. If these actions do not correct the problem, run the diagnostic programs (see "Diagnostic programs" on page 97 for instructions). If you need technical assistance, see Chapter 11 "Getting information, help, and service" on page 101. The image appears to be flickering Symptom: The image appears to be flickering. Actions: Chapter 10. Troubleshooting and diagnostics 89