Dell 745N Troubleshooting Your System, Safety First-For You and Your System, External Connections

Troubleshooting Your System

Safety First—For You and Your System

To perform certain procedures in this document, you must remove the system cover and work inside the system. While working inside the system, do not attempt to service the system except as explained in this guide and elsewhere in your system documentation.

CAUTION: Always follow the instructions closely, and ensure that you review all information in "Safety Instructions" in the System Information Guide.

CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.

External Connections

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

Checking Basic Power Problems

1If the power indicator on the bezel does not indicate that power is available to the system, ensure that the power cable is securely connected to the power supply.

2If the system is connected to a PDU or UPS, turn the PDU or UPS off and then on.

3If the PDU or UPS is not receiving power, plug it into another electrical outlet. If it still is not receiving power, try another PDU or UPS.

4Reconnect the system to the electrical outlet and turn on the system.

5If the system still is not working properly, see "Troubleshooting the Power Supply."

Start-Up Routine

Look and listen during the system's start-up routine for the indications described in Table 5-1.

Troubleshooting Your System

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