IBM eServer 342 xSeries Installation Manual page 49

Device
Monitor
Testing the monitor.
The screen is blank.
Only the cursor appears.
The monitor works when
you turn on the server, but
goes blank when you start
some application programs.
Wavy, unreadable, rolling,
distorted screen, or screen
jitter.
Wrong characters appear on
the screen.
Table 4. Troubleshooting charts.
Some IBM monitors have their own self-tests. If you suspect a problem with your
monitor, refer to the information that comes with the monitor for adjusting and testing
instructions.
If you still cannot find the problem, call for service.
Verify that:
1. The server power cord is plugged into the server and a working electrical outlet.
2. The monitor cables are connected properly.
3. The monitor is turned on and the Brightness and Contrast controls are adjusted
correctly.
If the items above are correct and the screen remains blank, call for service.
Attention: In some memory configurations, the 3-3-3 beep code might sound during
POST followed by a blank display screen. If this occurs and the Boot Fail Count feature
in the Start Options of the Configuration/Setup Utility is set to Enabled (its default
setting), you must restart the server three times to force the system BIOS to reset the
memory connector or bank of connectors from Disabled to Enabled.
Call for service.
Verify that:
1. The primary monitor cable is connected to the video port.
2. You installed the necessary device drivers for the applications.
If the items above are correct and the screen remains blank, call for service.
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, see your IBM
reseller or IBM marketing representative.
If the problem remains, call for service.
If the wrong language is displayed, update the BIOS code with the correct language.
If the problem remains, call for service.
Suggested action
Chapter 5. Solving Problems
37