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.

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

If 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.

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

If 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.

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

If the system still is not working properly, see "

Troubleshooting the Power Supply

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.