Dell PowerVault 735N (Rackmount NAS Appliance) - Manual (Page 44)

5-4 Installation and Troubleshooting Guide
2. Change the Serial Port 1 and Serial Port 2 settings to Enabled, then reboot the
system.
Is the problem resolved?
Yes . You have fixed the problem.
No . Go to step 3.
3. Reboot the system from the diagnostics diskette, and run the serial ports test in
the Dell Diagnostics.
Did the tests run successfully?
Yes . Go to step 4.
No . See Chapter 9, “Getting Help,” for instructions on obtaining technical
assistance.
4. If the problem persists, see “Troubleshooting a Serial I/O Device.”
Troubleshooting a Serial I/O Device
If the procedure in “Troubleshooting the Basic I/O Functions” indicates that the prob-
lem is with a device connected to one of the serial ports, perform the following steps:
1. Turn off the system and any peripheral devices connected to the serial ports.
Are two serial devices connected to the system?
Yes . Go to step 2.
No . Go to step 4.
2. Disconnect the devices from serial ports 1 and 2, and connect the malfunctioning
serial device to the opposite port.
3. Turn on the system and the reconnected serial device.
Is the problem resolved?
Yes . The serial port may be defective. See Chapter 9, “Getting Help,” for instruc-
tions on obtaining technical assistance.
No . Go to step 4.
4. Swap the interface cable that connects the device to the serial port with a known
working cable.
Is the problem resolved?
Yes . The interface cable must be replaced. See Chapter 9, “Getting Help,” for
instructions on obtaining technical assistance.
No . Go to step 5.
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