Dell PowerEdge R905 Hardware Owner's Manual (PDF) - Page 148
Troubleshooting Serial I/O Problems, Troubleshooting a Serial I/O Device
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Troubleshooting Serial I/O Problems Problem • Error message indicates a problem with a serial port. • 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 and configured correctly for your application. See "Using the System Setup Program" on page 43. 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 Dell PowerEdge Diagnostics" on page 167. If the tests run successfully but the problem persists, see Troubleshooting a Serial I/O Device. Troubleshooting a Serial I/O Device Problem • 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. 3 Turn off the system and the serial device, and swap the device with a comparable device. 148 Troubleshooting Your System