IBM eServer xSeries 455 Type 8855 Hardware Maintenance Manual And Troubleshooting Manual page 208

Symptom
The monitor works when you
turn on the server but goes
blank when you start some
application programs.
The screen is wavy, unreadable,
rolling, distorted, or has screen
jitter.
Wrong characters appear on the
screen.
No video (loose connection)
Option problems
An IBM option that was just
installed does not work.
An IBM option that used to work
does not work now.
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IBM xSeries 455 Type 8855: Hardware Maintenance Manual and Troubleshooting Guide
Suggested action
Make sure that:
1. The primary monitor cable is connected to the server.
2. You installed the necessary device drivers for the applications.
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 wrong language is displayed, update the SAL/EFI code with the correct
language.
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.
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.
4. You have not loosened any other installed options or cables.
5. You updated the configuration information using the Configuration/Setup Utility
program. Whenever memory or an option is changed, you must update the
configuration.
Make sure that all of the option hardware and cable connections are secure.
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.