Users Guide

support.dell.com Checking the Equipment 6-5
4. Power on the system and the serial device.
Is the problem resolved?
Ye s . The serial device must be replaced. See Chapter 10, “Getting Help,” for
instructions on obtaining technical assistance.
No. See Chapter 10, “Getting Help,” for instructions on obtaining technical
assistance.
Troubleshooting USB Devices
If a system error message indicates a problem with the universal serial bus (USB)
connectors or the device connected to the port does not function properly, perform
the following steps:
1. Enter the System Setup program, and check that the USB connectors are
enabled.
2. Power off the system and any devices connected to the USB connectors.
Are two USB devices connected to the system?
Ye s . Go to step 3.
No. Go to step 5.
3. Disconnect the devices from USB connectors 1 and 2, and connect the
malfunctioning device to the opposite connector.
4. Power on the system and the reconnected device.
Is the problem resolved?
Ye s . The USB connector might be defective. See Chapter 10, “Getting Help,” for
instructions on obtaining technical assistance.
No. Go to step 5.
5. If possible, swap the interface cable that connects the device to the USB
connector with a known working cable.
Is the problem resolved?
Ye s . The interface cable must be replaced. See Chapter 10, “Getting Help,” for
instructions on obtaining technical assistance.
No. Go to step 6.
6. Power off the system and the USB device, and swap the device with a compara-
ble working device.
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