Dell 840 Troubleshooting a NIC, Troubleshooting a USB Device, NIC cannot communicate with network

4Turn on the system and the serial device.

If the problem is resolved, replace the serial device. See "Getting Help" on page 121. If the problem persists, see "Getting Help" on page 121.

Troubleshooting a USB Device

Problem

•System message indicates a problem with a USB device.

•Device connected to a USB port is not operating properly.

Action

1Enter the System Setup program, and ensure that the USB ports are enabled. See "Using the System Setup Program."

2Turn off the system and any USB devices.

3Disconnect the USB devices, and connect the malfunctioning device to the other USB connector.

4Turn on the system and the reconnected device.

If the problem is resolved, the USB connector might be defective. See "Getting Help" on page 121"

5If possible, swap the interface cable with a working cable.

If the problem is resolved, replace the interface cable. See "Getting Help" on page 121.

6Turn off the system and the USB device, and swap the device with a comparable device.

7Turn on the system and the USB device.

If the problem is resolved, replace the USB device. See "Getting Help" on page 121. If the problem persists, see "Getting Help" on page 121.

Troubleshooting a NIC

Problem

•NIC cannot communicate with network.

Action

1Run the appropriate online diagnostic test. See "Using Server Administrator Diagnostics" in "Running the System Diagnostics."

Troubleshooting Your System

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