Symptom

Suggested action

 

 

The monitor works when you

Make sure that:

turn on the server but goes

1.

The primary monitor cable is connected to the server.

blank when you start some

2.

You installed the necessary device drivers for the applications.

application programs.

 

 

 

 

The screen is wavy, unreadable,

If the monitor self-tests show the monitor is working properly, consider the

rolling, distorted, or has screen

location of the monitor. Magnetic fields around other devices (such as

jitter.

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.

 

 

Wrong characters appear on the

If the wrong language is displayed, update the SAL/EFI code with the correct

screen.

language.

 

 

 

No video (loose connection)

1.

Reseat boards, VRMs, and microprocessors.

 

 

2.

Check for bent pins on all connectors.

 

3.

Reseat memory boards and DIMMs.

 

4.

Ensure proper population of DIMM banks.

 

5.

DIMMs.

 

6.

Power module.

 

7.

VRMs.

 

 

Option problems

Make sure that:

 

1.

The server supports the option.

 

2.

You followed the installation instructions that come with the option.

 

3.

The option is installed correctly.

An IBM option that was just

4.

You have not loosened any other installed options or cables.

installed does not work.

5.

You updated the configuration information using the Configuration/Setup Utility

 

 

 

program. Whenever memory or an option is changed, you must update the

 

 

configuration.

 

 

An IBM option that used to work

Make sure that all of the option hardware and cable connections are secure.

does not work now.

If the option comes with its own test instructions, use those instructions to test the

 

 

option.

 

If the failing option is a SCSI option, verify that:

 

1.

The cables for all external SCSI options are connected correctly.

 

2.

The last option in each SCSI chain, or the end of the SCSI cable, is terminated

 

 

correctly.

 

3.

Any external SCSI option is turned on. You must turn on an external SCSI

 

 

option before turning on the server.

 

 

 

178IBM xSeries 450 Type 8688: Hardware Maintenance Manual and Troubleshooting Guide

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IBM 8688 Symptom Suggested action, Language, Reseat boards, VRMs, and microprocessors, Option problems Make sure that