IBM NetVista X40 User Manual page 106

Table 4. Troubleshooting charts (continued)
Device
The mouse or pointing device
does not work.
Memory
The amount of memory
displayed is less than the
amount of memory installed.
Microprocessor
The system emits a continuous
tone during the POST.
Monitor
Testing the monitor.
The screen is blank.
Only the cursor appears.
The monitor works when you
turn on the system, but goes
blank when you start some
application programs.
The monitor works, but give an
Out of Range error
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IBM IntelliStation E Pro: User's Guide IntelliStation E Pro Types 6836, 6846
Suggested action
1. Verify that the mouse or pointing-device cable is securely connected and the
device drivers are installed correctly.
2. Try using another mouse or pointing device.
If the problem remains, call for service.
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 system might have
automatically disabled a DIMM bank when it detected a problem, or a DIMM
bank could have been manually disabled.
If the problem persists, call for service.
The startup (boot) microprocessor is not working properly.
Verify that the startup microprocessor is seated properly. If it is, replace the
startup microprocessor.
If the problem remains, 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 find the problem, call for service.
Verify that:
1. The system power cord is plugged into the computer 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.
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.
Go to the VGA node and change the refresh rate to match the optimal setting of
the monitor.