Dell PowerEdge 650 - Manual (Page 37)

If the problem is resolved, you must replace the faulty mouse. See " Getting Help ."
3. Enter the System Setup program, and ensure that the mouse controller is enabled. See "Using the System Setup Program" in your User's Guide.
If the problem is not resolved, continue to step 4 .
4. Run the pointing devices test in the system diagnostics. See " Running the System Diagnostics ."
If the test fails, see " Getting Help ."
Troubleshooting Basic I/O Functions
Problem
l Error message indicates a problem with a serial port.
l Device connected to a serial port is not operating properly.
Action
1. Enter the System Setup program and ensure that the serial port is enabled. See "Using the System Setup Program" in your User's Guide.
2. If the problem is confined to a particular application, see the application documentation for specific port configuration requirements that the program
may require.
3. Run the appropriate online diagnostic test. See " Using Server Administrator Diagnostics " in "Running the System Diagnostics."
If the tests run successfully but the problem persists, see " Troubleshooting a Serial I/O Device ."
Troubleshooting a Serial I/O Device
Problem
l Device connected to the serial port is not working.
Action
1. Remove the bezel. See " Opening the System ."
2. Turn off the system and any peripheral devices connected to the serial port.
3. Swap the interface cable with a known working cable.
4. Turn on the system and the serial device.
If the problem is resolved, the interface cable must be replaced. See " Getting Help ."
5. Turn off power to the system and the serial device, and swap the device with a comparable device.
6. Turn on the system and the serial device.
If the problem is resolved, the serial device must be replaced.
If the problem is not resolved, see " Getting Help ."
Troubleshooting a USB Device