IBM 8677 - BladeCenter Rack-mountable - Power... Hardware Maintenance Manual And Troubleshooting Manual Download

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Table 2. Troubleshooting charts (continued)

Device

Suggested action

Monitor problems

The monitor works when you
start the BladeCenter unit, but
goes blank when you start
some application programs in
the blade servers.

See the

IBM 4-Port Gb Ethernet Switch Module for BladeCenter Installation Guide

for

instructions on how to ping through the Telnet interface.

The monitor displays video
for blade server 14 during
management module restart.

The monitor attached to the BladeCenter management module normally shows the
video output from the blade server that is the current owner of the keyboard, video,
and mouse (KVM). When there is no actively selected video from any blade server,
the video from blade server 14 is routed to the management module. While the
management module is restarting, there is temporarily no current KVM owner. The
video from blade server 14 displays on the monitor briefly until the management
module uses its NVRAM values to reestablish ownership of the KVM and media tray
(optical drive, diskette drive, and USB port). After that, the video from the blade
server that is the current KVM owner displays on the monitor.

The screen is blank.

Verify that:
1. The system power cord is plugged into the BladeCenter power module and a

working 220-volt PDU or electrical outlet.

2. The monitor cables are connected properly.
3. The monitor is turned on and the brightness and contrast controls are adjusted

correctly.

4. If you have verified these items and the screen remains blank, replace:

a. Monitor
b. Management module

Only the cursor appears.

See “Undetermined problems” on page 75.

The screen is wavy,
unreadable, rolling, distorted,
or has screen jitter.

If the monitor self-tests show the monitor is working properly, consider the location of
the monitor. Magnetic fields around other devices (such as transformers, appliances,
fluorescent lights, and other monitors) can cause screen jitter or wavy, unreadable,
rolling, or distorted screen images. If this happens, turn off the monitor. (Moving a
color monitor while it is turned on might cause screen discoloration.) Then move the
device and the monitor at least 305 mm (12 in.) apart. Turn on the monitor.

Notes:

1. To prevent diskette drive read/write errors, be sure the distance between monitors

and diskette drives is at least 76 mm (3 in.).

2. Non-IBM monitor cables might cause unpredictable problems.

3. An enhanced monitor cable with additional shielding is available for the 9521 and

9527 monitors. For information about the enhanced monitor cable, contact your
IBM reseller or IBM marketing representative.

If the problem remains, replace the monitor.

Wrong characters appear on
the screen.

If the wrong language is displayed, update the firmware in the management module
with the correct language. If the problem remains, replace the management module.

Mouse problems

Mouse function lost during
Red Hat installation.

If, while installing Red Hat Linux 7.3 to a blade server, you or someone else selects a
different blade server as owner of the keyboard, video, and monitor (KVM), you might
lose mouse function for the installation process.

Do not switch KVM owners until the installation process begins to install the
packages (after the ’About to Install’ window).

BladeCenter E Type 8677 and 1881: Hardware Maintenance Manual and Troubleshooting Guide