IBM 86884RX Maintenance Manual - Page 188

Symptom Suggested action The monitor works when you turn on the server but goes blank when you start some application programs. Make sure that: 1. The primary monitor cable is connected to the server. 2. You installed the necessary device drivers for the applications. 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 An IBM option that was just installed does not work. 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. 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. 178 IBM xSeries 450 Type 8688: Hardware Maintenance Manual and Troubleshooting Guide