Monitor And Video Problems - Lenovo ThinkSystem SR630 Maintenance Manual

Monitor and video problems

Use this information to solve problems related to a monitor or video.
• "Incorrect characters are displayed" on page 241
• "Screen is blank" on page 241
• "Management controller remote presence cannot work" on page 241
• "Screen goes blank when you start some application programs" on page 241
• "The monitor has screen jitter, or the screen image is wavy, unreadable, rolling, or distorted" on page 241
• "The wrong characters appear on the screen" on page 242
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 "Firmware
updates" on page 11.
Screen is blank
Note: Make sure that the expected boot mode has not been changed from the UEFI to Legacy or vice versa.
1. 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.
2. If the server is installed with the graphical adapters while turning on the server, the Lenovo logo is
displayed on the screen after approximately 3 minutes. This is normal operation while the system loads.
3. Make sure that:
• The server is turned on and there is power supplied to the server.
• The monitor cables are connected correctly.
• The monitor is turned on and the brightness and contrast controls are adjusted correctly.
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 "Firmware updates"
on page 11.
6. If the problem remains, contact Lenovo Support.
Management controller remote presence cannot work
The management controller remote presence function is unable to display the system screen when an
optional video adapter is present. To use the management controller remote presence function, remove the
optional video adapter or use the onboard VGA as the display device. The management controller remote
presence function is disabled if you install an optional video adapter.
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
monitors) can cause screen jitter or wavy, unreadable, rolling, or distorted screen images. If this
happens, turn off the monitor.
.
Chapter 5 Problem determination
241