Wrong characters appear on the screen
Symptom: Wrong characters appear on the screen.
Action: Have the computer serviced. For details, see “Lenovo Support Web site” on page 31.
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
If these actions do not correct the problem, run the Lenovo Solution Center program. If you need technical assistance, see “Lenovo Support Web site” on page 31.
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:
•Ensure that 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 Lenovo Solution Center program. If you need technical assistance, see “Lenovo Support Web site” on page 31.
The image appears to be flickering
Symptom: The image appears to be flickering.
Actions:
•The monitor might be operating in a
Attention: Using a resolution or refresh rate that is not supported by your monitor might damage it. Check the documentation that comes with your monitor to verify the supported refresh rates.
•The monitor might be affected by interference from nearby equipment. Magnetic fields around other devices, such as transformers, appliances, fluorescent lights, and other monitors might be causing the problem. Move fluorescent desk lighting or any equipment that produces magnetic fields farther away from the monitor. If this does not correct the problem, do the following:
1.Turn off the monitor. (Moving a color monitor while it is turned on might cause screen discoloration.)
2.Adjust the placement of the monitor and other devices so that they are at least 305 mm (12 inches) apart.
3.Turn on the monitor.
•You can reset the refresh rate through your operating system Control Panel:
On the Windows 7 operating system, click Start ➙ Control Panel ➙ Hardware and Sound ➙ Adjust screen resolution ➙ Advanced Settings. Then click the Monitor tab and select a new refresh rate.
Chapter 5. Troubleshooting and diagnostics 45