Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 34)

System error message indicates an I/O port problem
Device connected to the port is not working
Action
1. Enter the System Setup program (see "Using the System Setup Program" in the User's Guide for instructions) and
check the Serial Port settings.
If the ports are set to Auto, go to step 3.
If the ports are not set to Off, continue to step 2.
2. Change the Serial Port settings to Auto; then reboot the system.
3. Check the settings in the System Setup program.
See "Using the System Setup Program" in the User's Guide for instructions. If the settings are correct, go to step 5.
4. Change the necessary settings in the System Setup program. If the port problem is confined to a particular application
program, see the application program's documentation for specific port configuration requirements.
5. Reboot the system from the diagnostics diskette, and run the serial port test in the system diagnostics.
If the test did not run successfully, see " Getting Help " for instructions on obtaining technical assistance.
If the test runs successfully but the problem persists, see " Troubleshooting a Serial I/O Device ."
Troubleshooting a Serial I/O Device
Problem
Device connected to the port is not working
Action
1. Turn off the system and any peripheral devices connected to the serial ports.
2. Swap the interface cable with a known working cable.
3. Turn on the system.
If the problem is resolved, the interface cable must be replaced (see " Getting Help ," for instructions on obtaining
technical assistance).
4. Turn off power to the system and the serial device, and swap the device with a comparable device.
5. 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 " for
instructions on obtaining technical assistance.
Troubleshooting a USB Device
Problem