Dell PowerEdge 750 Troubleshooting Guide Page 35

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If the problem is resolved, replace the faulty mouse. See "Getting Help."
5. Enter the System Setup program and ensure that the USB ports are enabled. See "Using the System Setup Program" in your User's Guide.
If the problem is not resolved, continue to the next step.
6. 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(s) are enabled. See "Using the System Setup Program" in the 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 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 operating properly.
Action
1. Turn off the system and any peripheral devices connected to the serial port.
2. Swap the serial interface cable with a working cable, and turn on the system and the serial device.
If the problem is resolved, replace the interface cable. See "Getting Help."
3. Turn off the system and the serial device, and swap the device with a comparable device.
4. Turn on the system and the serial device.
If the problem is resolved, replace the serial device. See "Getting Help."
If the problem persists, see "Getting Help."
Troubleshooting a USB Device
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