Device

Suggested action

The monitor has screen jitter,

If the monitor self-tests show the monitor is working correctly, consider the location of

or the screen image is wavy,

the monitor. Magnetic fields around other devices (such as transformers, appliances,

unreadable, rolling, or

fluorescent lights, and other monitors) can cause screen jitter or wavy, unreadable,

distorted.

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, make sure that the distance between

 

 

the monitor and diskette drive 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 marketing representative or authorized reseller.

 

If the problem remains, call for service.

 

 

All other symptoms

Troubleshoot the blade server that is the current owner of the keyboard, video, and

 

monitor.

Power problems

Device

Suggested action

 

 

The BladeCenter unit does

v Make sure that the power cables are properly connected to the power modules in

not start.

the BladeCenter unit.

 

v Make sure that the 220-volt PDU or electrical outlet is working correctly.

 

v Make sure that the LEDs on the power module are on.

 

v If you just installed an option, remove it, and restart the BladeCenter unit. If the

 

BladeCenter unit now starts, you might have installed more options than the power

 

module supports.

 

If the problem remains, call for service.

 

 

Management module problems

Device

Suggested action

 

 

Management module does

Call for service.

not complete changeover to

 

redundant module on

 

hardware failure.

 

 

 

Blower module problems

Device

Suggested action

 

 

Blower module operates at

Make sure that:

full speed, with no regulation.

v Both blower modules are functioning (neither has failed).

 

v Each power module is connected to an ac power source. A power module that is

 

not connected to an ac power source creates a non-redundant-power condition

 

and causes the blower modules to operate at full speed.

 

If a blower module has failed, replace the module as soon as possible.

 

 

Chapter 6. Solving problems 55

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Image 69
IBM 8677 manual Power problems, Management module problems, Blower module problems