Lenovo RD210 User Manual download pdf (Page 167)

Monitor problems

Some monitors have their own self-tests. If you suspect a problem with your

monitor, see the documentation that comes with the monitor for instructions for

testing and adjusting the monitor. If you cannot diagnose the problem, call for

service.

v Follow the suggested actions in the order in which they are listed in the Action column until the problem

is solved.

v See the Hardware Maintenance Manual to determine which components are customer replaceable units

(CRU) and which components are field replaceable units (FRU).

v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a

Trained service technician.

Symptom Action

Testing the monitor.

1. Make sure that the monitor cables are firmly connected.

2. Try using a different monitor on the server, or try using the monitor that is being

tested on a different server.

3. Run the diagnostic programs. If the monitor passes the diagnostic programs,

the problem might be a video device driver.

4. (Trained service technician only) Replace the system board.

The 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. Make sure that:

v The server is turned on. If there is no power to the server, see “Power

problems” on page 154.

v The monitor cables are connected correctly.

v The monitor is turned on and the brightness and contrast controls are

adjusted correctly.

v No beep codes sound when the server is turned on.

Important:

In some memory configurations, the 3-3-3 beep code might sound

during POST, followed by a blank monitor screen. If this occurs and the Boot

Fail Count option in the Start Options of the UEFI Setup Utility program is

enabled, you must restart the server three times to reset the configuration

settings to the default configuration (the memory connector or bank of

connectors enabled).

3. Make sure that the correct server is controlling the monitor, if applicable.

4. Make sure that damaged UEFI firmware is not affecting the video; see “Using

the Setup Utility” on page 116.

5. Observe the checkpoint LEDs on the system board; if the codes are changing,

go to step 6.

6. See “Troubleshooting tables” on page 144.

The monitor works when you

turn on the server, but the

screen goes blank when you

start some application

programs.

1. Make sure that:

v The application program is not setting a display mode that is higher than the

capability of the monitor.

v You installed the necessary device drivers for the application.

Run video diagnostics.

v If the server passes the video diagnostics, the video is good; see

“Troubleshooting tables” on page 144.

v (Trained service technician only) If the server fails the video diagnostics,

replace the system board.

Chapter 7. Solving problems 151

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