Lenovo ThinkAgile VX 4-Socket 4U Certified Node, Руководство пользователя

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3. Reseat the backplane signal cable and backplane power cable.
4. Reseat the hard disk drive.
5. Power on the server and observe the activity of the hard disk drive LEDs.
Monitor and video problems
Use this information to solve problems related to a monitor or video.
• “Incorrect characters are displayed” on page 257
• “Screen is blank” on page 257
• “Screen goes blank when you start some application programs” on page 257
• “The monitor has screen jitter, or the screen image is wavy, unreadable, rolling, or distorted.” on page 257
• “The wrong characters appear on the screen” on page 258
Incorrect characters are displayed
Complete the following steps:
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 68.
Screen is blank
1. The ThinkAgile VX7820 Appliance/VX 4U Certified Node server does not support installation of an
optional video adapter. If an optional video adapter is installed in the server, remove it.
2. 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.
3. Make sure that the correct server is controlling the monitor, if applicable.
4. Make sure that:
• The server is turned on. If there is no power to the server, the screen will be blank.
• The monitor cables are connected correctly. If monitors are connected to both the front and rear
video ports, only the monitor connected to the front video port will display information.
• The monitor is turned on and the brightness and contrast controls are adjusted correctly.
5. Make sure that corrupted server firmware is not affecting the video; see “Update the firmware” on page
68.
6. Observe the front operator panel LCD display for error codes.
7. Replace the following components one at a time, in the order shown, restarting the server each time:
a. Monitor
b. (Trained technician only) System board.
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.
• You installed the necessary device drivers 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
Chapter 10
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Problem determination
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