IBM HS40 - BladeCenter - 8839 Maintenance And Troubleshooting Manual page 102

Note: See Chapter 7, "Parts listing, Type 8839," on page 105 to determine which components should be replaced by
a field service technician.
Monitor problems
Symptom
Testing the monitor.
The screen is blank.
Only the cursor appears.
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.
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BladeCenter HS40 Type 8839: Hardware Maintenance Manual and Troubleshooting Guide
FRU/action
See the information that comes with the monitor for adjusting and testing
instructions. (Some IBM monitors have their own self-tests.)
1. Make sure 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. 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).
Make sure 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 101.
Make sure 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 your 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.