• “Screen goes blank when you start some application programs” on page 175
• “The monitor has screen jitter, or the screen image is wavy, unreadable, rolling, or distorted” on page 175
• “The wrong characters appear on the screen” on page 176
Incorrect characters are displayed
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” on page 161
.
Screen is blank
Complete the following steps until the problem is solved.
1. If you have installed new DIMMs recently, make sure the capacity of the new DIMMs are the same as the
previously installed ones. If not, remove the newly installed DIMMs, and power on the server again.
2. If there are other monitors that are connected to the server, remove them.
3. If the server is attached to a KVM switch, bypass the KVM switch to eliminate it as a possible cause of
the problem: connect the monitor cable directly to the correct connector on the rear of the server.
4. Make sure that:
• The server is turned on and there is power supplied to the server.
• The monitor cables are securely connected.
• The monitor is turned on with brightness and contrast controls adjusted correctly.
5. Disconnect the cable and select another video connector for connection.
6. 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
7. 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 with resolution that is higher than the capability
of the monitor.
• The necessary device drivers for the application are all installed.
The monitor has screen jitter, or the screen image is wavy, unreadable, rolling, or distorted
Complete the following steps until the problem is solved.
1. If the monitor self-tests show that the monitor is working correctly, examine 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 inches) apart, and turn on the monitor.
Notes:
Chapter 8. Problem determination 175
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