IBM 8686 - Eserver xSeries 360 Hardware Maintenance Manual page 140

Error Symptom
The amount of memory displayed is less
than the amount of memory that is installed.
The server emits a continuous tone during
POST.
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.
An IBM option that you just installed does
not work.
130
Hardware Maintenance Manual: xSeries 360 Type 8686
FRU/Action
Verify that:
1. The memory modules are seated properly.
2. You have installed the correct type of memory.
3. If you changed the memory, you updated the memory configuration
with the Configuration/Setup utility program.
4. All banks of memory on the DIMMs are enabled. The server might
have automatically disabled a DIMM bank if it detected a problem,
or a DIMM bank might have been manually disabled.
If these items are correct, run the memory diagnostic program. The
server might have detected a bad memory module and automatically
reallocated memory to enable the server to continue to operate. If the
memory tests fail, replace the failing DIMM.
The startup (boot) microprocessor is not working properly.
Verify that the startup microprocessor is seated properly. If it is, replace
the startup microprocessor.
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 monitor self-tests show 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. (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 that 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 IBM model 9521 and 9527 monitors.
If the wrong language is displayed, update the BIOS with the correct
language.
Verify that:
1. The server supports the option. Refer to the "Server Support"
flowchart for information about obtaining ServerProven
compatibility information from the World Wide Web.
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.
®