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Monitor or video problems
Some IBM 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 Chapter 3, "Parts listing, Type 7981," on page 53 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
The screen is blank.
Only the cursor appears.
The monitor goes blank when
you direct it to a working blade
server, or it goes blank when
you start some application
programs in the blade servers.
Action
1. Make sure that:
v The keyboard/video/mouse select button LED on the front of the blade
server is lit, indicating that the blade server is connected to the shared
BladeCenter monitor.
Note: You can test the monitor functionality by enabling the
keyboard/video/mouse select button on another blade server.
v The system power cord is connected to the BladeCenter power module and
a working electrical outlet.
v The monitor cables are connected correctly.
v The monitor is turned on and the brightness and contrast controls are
adjusted correctly.
v Damaged BIOS code is not affecting the video; see "Recovering from a
BIOS update failure" on page 48.
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 Configuration/Setup Utility
program is enabled, you must restart the blade server three times to reset the
configuration settings to the default configuration (the memory connector or
bank of connectors enabled).
2. Replace the following components:
a. Monitor
b. Management-module in the BladeCenter (see the Hardware Maintenance
Manual and Troubleshooting Guide or Problem Determination and Service
Guide for your BladeCenter unit).
c. (Trained service technician only) System board assembly
Make sure that the keyboard, video, and mouse have not been switched to another
blade server. If the problem remains, see "Solving undetermined problems" on
page 49.
Make sure that the monitor cable is connected to the video connector on the
BladeCenter management-module. Some IBM monitors have their own self-tests. If
you suspect a problem with the monitor, see the information that comes with the
monitor instructions for adjusting and testing the monitor.
If you still cannot find the problem, try using the monitor with another blade server.
If the problem remains, see the Hardware Maintenance Manual and
Troubleshooting Guide or Problem Determination and Service Guide for your
BladeCenter unit.
31
Chapter 2. Diagnostics
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