IBM 8672-26x Manual page 53

Table 4. Troubleshooting charts (continued)
Device
Memory problems
The amount of memory
displayed is less than the
amount of memory that is
installed.
Microprocessor problems
The server emits a continuous
tone during POST.
Monitor problems
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.
Suggested Action
Verify that:
v The memory modules are seated properly.
v You have installed the correct type of memory.
v If you changed the memory, you updated the memory
configuration with the Configuration/Setup Utility
program.
v All banks of memory on the DIMMs are enabled. The
server might have automatically disabled a DIMM bank
when it detected a problem, or a DIMM bank could
have been manually disabled.
Look in the POST error log for error message 289:
v If the DIMM was disabled by a systems-management
interrupt (SMI), replace the DIMM.
v If the DIMM was disabled by the user or by POST:
1. Start the Configuration/Setup Utility program.
2. Enable the DIMM.
3. Save the configuration and restart the server.
v If you continue to get this error, replace the DIMM.
If the problem continues, call for service.
The startup (boot) microprocessor is not working
properly. Verify that the startup microprocessor is seated
properly. If it is, call for service.
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 determine the
problem, call for service. Verify that:
v The xSeries Hosting Appliance power cord is plugged
into the xSeries Hosting Appliance and a working
electrical outlet.
v The monitor cables are connected properly.
v The monitor is turned on and the brightness and
contrast controls are adjusted correctly.
If the screen remains blank, call for service.
Call for service.
Verify that you installed the necessary device drivers for
the applications. If the screen remains blank, call for
service.
Chapter 5. Solving problems
41