IBM 84885BU User Manual - Page 124
self-tests
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Note: See Chapter 7, "Parts listing Type 8488 and 8648," on page 129 to determine which components are replaceable by the customer (CRU), and which components must be replaced by a field service technician (FRU). Monitor Symptom FRU/action The screen is wavy, unreadable, 1. If the monitor self-tests show the monitor is working properly, consider rolling, distorted, or has screen the 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: a. To prevent diskette drive read/write errors, make sure that the distance between monitors and diskette drives is at least 76 mm (3 in.). b. Non-IBM monitor cables might cause unpredictable problems. c. 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. 2. Video adapter, if installed. 3. System board. Wrong characters appear on the 1. If the wrong language is displayed, update the BIOS code with the correct screen. language. 2. Video adapter, if installed. 3. System board. No video. Make sure that all cables are connected correctly and securely. If you have installed a Remote Supervisor Adapter II in the server, make sure that the video cable is connected to the Remote Supervisor Adapter II. Note: See Chapter 7, "Parts listing Type 8488 and 8648," on page 129 to determine which components are replaceable by the customer (CRU), and which components must be replaced by a field service technician (FRU). Option Symptom FRU/action An IBM option that was just installed does not work. 1. Verify that: v The option is designed for the server (see the ServerProven® list at http://www.ibm.com/pc/compat/). v You followed the installation instructions that came with the option. v The option is installed correctly. v You have not loosened any other installed options or cables. v You updated the configuration information in the Configuration/Setup Utility program. Whenever memory or an option is changed, you must update the configuration. 2. Option you just installed. 114 xSeries 226 Type 8488 and 8648: Hardware Maintenance Manual and Troubleshooting Guide