IBM 621858U Installation Guide - Page 60

v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Problem Determination and Service Guide to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU). v If an action step is preceded by "(Trained service technician)," that step must be performed only by a trained service technician. Symptom Action The monitor has screen jitters, or the screen image is wavy, unreadable, rolling, or distorted. 1. If the monitor self-tests show that 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. Attention: Moving a color monitor while it is turned on might cause screen discoloration. Move the device and the monitor al least 305 mm (12 in.) apart, and turn on the monitor. Notes: a. To prevent diskette drive read/write errors, make sure that the distance between the monitor and any external diskette drive is at least 76 mm (3 in.). b. Non-IBM monitor cables might cause unpredictable problems. 2. Replace the following components one at a time, in the order shown, restarting the computer each time: a. Monitor b. Video adapter (if one is installed) c. (Trained services technician only) System board. Wrong characters appear on the screen. 1. If the wrong language is displayed, update the BIOS code with the correct language. 2. Replace the following components one at a time, in the order shown, restarting the computer each time: a. Video adapter (if one is installed) b. (Trained service technician only) System board. 48 IBM IntelliStation M Pro Type 6218: Installation Guide