IBM eServer BladeCenter HS20 Type 8832, Maintenance And Troubleshooting Manual

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Note: See “System” on page 94 to determine which components should be replaced by a field service technician.
Monitor problems
Symptom FRU/action
The screen is blank.
1. Verify that:
v
The keyboard/mouse/video select button LED on the front of the blade
server is lit, indicating that the blade server is connected to the shared
BladeCenter monitor.
v The system power cord is plugged into the BladeCenter power module and a
working electrical outlet.
v
The monitor cables are connected properly.
v The monitor is turned on and the Brightness and Contrast controls are
adjusted correctly.
v If the computers are C2T chained together, verify that:
– The C2T chain cables are securely connected to the computers.
– The C2T breakout cable is connected properly.
– A computer that is turned on is selected.
Important: In some memory configurations, the 3-3-3 beep code might sound
during POST followed by a blank display screen. If this occurs and the Boot
Fail Count feature in the Start Options of the Configuration/Setup Utility
program is set to Enabled (its default setting), you must restart the computer
three times to force the system BIOS to reset the CMOS values to the default
configuration (memory connector or bank of connectors enabled).
2. Make sure that damaged BIOS code is not affecting the video; see “Recovering
the BIOS code” on page 25.
3. If you have verified these items and the screen remains blank, replace:
a. Monitor
b. Management module on the BladeCenter (see the IBM BladeCenter Type
8677 Hardware Maintenance Manual and Troubleshooting Guide ).
Only the cursor appears.
v
Verify that the keyboard, video and mouse on the BladeCenter have not been
switched to another blade server. If the problem remains, see“Undetermined
problems” on page 90.
The monitor goes blank when
you direct it to a working blade
server, or goes blank when you
start some application programs
in the blade servers.
v Verify that the monitor cable is connected to the video port 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 for adjusting and testing instructions.
If you still cannot find the problem, try using the monitor with another blade
server. If the problem persists, see the IBM
BladeCenter Type 8677 Hardware
Maintenance Manual and Troubleshooting Guide on the IBM BladeCenter
Documentation CD.
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BladeCenter HS20 Type 8832: Hardware Maintenance Manual and Troubleshooting Guide