Quick Reference Guide

6-6 Dell PowerEdge 2450 Systems Installation and Troubleshooting Guide
5. Turn off the computer and the serial device, and swap the device with a compara-
ble working device.
For example, if the serial mouse has a problem, swap it with a serial mouse that
you know is working properly.
6. Turn on the computer and the serial device.
Is the problem resolved?
Ye s . The serial device must be replaced. See Chapter 11, “Getting Help,” for
instructions on obtaining technical assistance.
No. See Chapter 11, “Getting Help,” for instructions on obtaining technical
assistance.
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If a system error message indicates a problem with the USB ports or the device con-
nected to the port does not function properly, perform the following steps:
1. Enter the System Setup program, and check that the USB ports are enabled.
2. Turn off the computer and any devices connected to the USB ports.
Are two USB devices connected to the computer?
Ye s . Go to step 3.
No. Go to step 5.
3. Disconnect the devices from USB ports 1 and 2, and connect the malfunctioning
device to the opposite port.
4. Turn on the computer and the reconnected device.
Is the problem resolved?
Ye s . The USB port may be defective. See Chapter 11, “Getting Help,” for instruc-
tions on obtaining technical assistance.
No. Go to step 5.
5. If possible, swap the interface cable that connects the device to the USB port
with a known working cable.
Is the problem resolved?
Ye s . The interface cable must be replaced. See Chapter 11, “Getting Help,” for
instructions on obtaining technical assistance.
No. Go to step 6.
6. Turn off the computer and the USB device, and swap the device with a compara-
ble working device.