IBM HS12 Service Guide - Page 183
Video problems, Solving undetermined problems, Installation Guide, Hardware Maintenance
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Video problems Use this information to diagnose and resolve video issues . To check for video problems, complete the following steps until the problem is solved: 1. Make sure that: v Both the blade server and the monitor are turned on, and the monitor brightness and contrast controls are correctly adjusted. v The keyboard/video/mouse select button LED on the front of the blade server is lit, indicating that the blade server is connected to the shared BladeCenter monitor. v The video cable is securely connected to the BladeCenter management module. Non-IBM monitor cables might cause unpredictable problems. v The monitor works with another blade server. v Some IBM monitors have their own self-tests. If you suspect a problem with the monitor, see the information that comes with the monitor for instructions for adjusting and testing the monitor. If the monitor self-tests show that the monitor is working correctly, 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 at least 305 mm (12 in.) apart. Turn on the monitor. To prevent diskette drive read/write errors, make sure that the distance between the monitor and any diskette drive is at least 76 mm (3 in.). 2. Check for correct management-module operation (see the documentation for your BladeCenter unit). Note: Some BladeCenter unit types have several management-module components that might have to be tested or replaced (see the Installation Guide for your management module for more information). 3. Replace the monitor cable, if applicable. 4. Replace the monitor. 5. Replace the management module (see the documentation for your BladeCenter unit). If these steps do not solve the problem, it is likely a problem with the blade server. See "Monitor or video problems" on page 118. Solving undetermined problems Use this information to diagnose and resolve undetermined issues with the blade server. Note: When you are diagnosing a problem in the blade server, you must determine whether the problem is in the blade server or in the BladeCenter unit. v If all of the blade servers have the same symptom, the problem is probably in the BladeCenter unit. For more information, see the Hardware Maintenance Manual and Troubleshooting Guide or Problem Determination and Service Guide for your BladeCenter unit. Chapter 6. Diagnostics 171
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