Troubleshooting External Connections; Troubleshooting A Wet System - Dell POWEREDGE 840 Hardware Owner's Manual

2 Check the appropriate indicator on the NIC connector. See "NIC Indicator Codes" on page 14.
• If the link indicator does not light, check all cable connections.
• If the activity indicator does not light, the network driver files might be damaged or missing.
Remove and reinstall the drivers if applicable. See the NIC's documentation.
• Change the autonegotiation setting, if possible.
• Use another connector on the switch or hub.
If you are using a NIC card instead of an integrated NIC, see the documentation for the NIC card.
3 Ensure that the appropriate drivers are installed and the protocols are bound. See the NIC's
documentation.
4 Enter the System Setup program and confirm that the NICs are enabled. See "Using the System Setup
Program."
5 Ensure that the NICs, hubs, and switches on the network are all set to the same data transmission
speed. See the network equipment documentation.
6 Ensure that all network cables are of the proper type and do not exceed the maximum length.

Troubleshooting External Connections

Loose or improperly connected cables are the most likely source of problems for the system, monitor, and
other peripherals (such as a printer, keyboard, mouse, or other external device). Ensure that all external
cables are securely attached to the external connectors on your system. See Figure 1-2 for the back-panel
connectors on your system.

Troubleshooting a Wet System

Problem
• Liquid spilled on the system.
• Excessive humidity.
Action
CAUTION:
Only trained service technicians are authorized to remove the system cover and access any of the
components inside the system. Before performing any procedure, see your Product Information Guide for
complete information about safety precautions, working inside the computer and protecting against electrostatic
discharge.
1 Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.
2 Open the system. See "Opening the System" on page 43.
3 Remove all expansion cards installed in the system. See "Installing an Expansion Card" on page 72.
4 Let the system dry thoroughly for at least 24 hours.
96
Troubleshooting Your System