4. Make sure that the correct server is controlling the monitor, if applicable.
5. Make sure that the video output is not affected by corrupted server firmware. See “Update the firmware”
in User Guide or System Configuration Guide.
6. If the problem remains, contact Lenovo Support.
Screen goes blank when you start some application programs
1. Make sure that:
• The application program is not setting a display mode that is higher than the capability of the monitor.
• The necessary device drivers have been installed for the application.
The monitor has screen jitter, or the screen image is wavy, unreadable, rolling, or distorted
1. If the monitor self-tests show that the monitor is working correctly, consider the location of the monitor.
Magnetic fields around other devices (such as transformers, appliances, fluorescents, and other
monitors) can cause screen jitter or wavy, unreadable, rolling, or distorted screen images. If this
happens, turn off the monitor.
Attention: Moving a color monitor while it is turned on might cause screen discoloration.
Move the device and the monitor at least 305 mm (12 in.) apart, and turn on the monitor.
Notes:
a. To prevent diskette drive read/write errors, make sure that the distance between the monitor and any
external diskette drive is at least 76 mm (3 in.).
b. Non-Lenovo monitor cables might cause unpredictable problems.
2. Reseat the monitor cable.
3. Replace the following components one at a time, in the order shown, restarting the server each time:
a. Monitor cable
b. Monitor
c. (Trained technician only) System board.
The wrong characters appear on the screen
Complete the following steps until the problem is solved:
1. Verify that the language and locality settings are correct for the keyboard and operating system.
2. If the wrong language is displayed, update the server firmware to the latest level. See “Update the
firmware” in User Guide or System Configuration Guide.
Network problems
Use this information to resolve issues related to networking.
•
“Cannot wake server using Wake on LAN” on page 165
• “Could not log in using LDAP account with SSL enabled” on page 166
Cannot wake server using Wake on LAN
Complete the following steps until the problem is solved.
1. Check the system event log and resolve any related problems. To view the system event log, go to
Setup Utility and select Security ➙ System Event Log ➙ View System Event Log.
Chapter 3. Problem determination 165
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