Lenovo ThinkSystem SR860, Руководство по обслуживанию

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3. Return the removed DIMMs, one at a time, to their original connectors, restarting the server after each
DIMM, until a DIMM fails. Replace each failing DIMM with an identical known good DIMM, restarting the
server after each DIMM replacement. Repeat step 3 until you have tested all removed DIMMs.
4. Replace the highest-numbered DIMM of those identified; then, restart the server. Repeat as necessary.
5. Reverse the DIMMs between the channels (of the same processor), and then restart the server. If the
problem is related to a DIMM, replace the failing DIMM.
6. (Trained technician only) Install the failing DIMM into a DIMM connector for processor 2 (if installed) to
verify that the problem is not the processor or the DIMM connector.
7. (Trained technician only) Replace the system board.
Monitor and video problems
Use this information to solve problems related to a monitor or video.
• “Incorrect characters are displayed” on page 180
• “Screen is blank” on page 180
• “Screen goes blank when you start some application programs” on page 180
• “The monitor has screen jitter, or the screen image is wavy, unreadable, rolling, or distorted.” on page 181
• “The wrong characters appear on the screen” on page 181
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 5.
Screen is blank
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. The management controller remote presence function is disabled if you install an optional video adapter.
To use the management controller remote presence function, remove the optional video adapter.
3. If the server installed with the graphical adapters while turning on the server, the Lenovo logo displays
on the screen after approximately 3 minutes. This is normal operation while the system loads.
4. 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.
5. Make sure that the correct server is controlling the monitor, if applicable.
6. Make sure that the video output is not affected by corrupted server firmware; see “Firmware updates”
on page 5.
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 that is higher than the capability of the monitor.
• You installed the necessary device drivers for the application.
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ThinkSystem SR860 Maintenance Manual