Dell 720H2C appendix Front I/O-Panel Components, Removing the Front I/O Panel

1.Slide the power supply into place, ensuring that the tabs on the rear wall of the computer chassis latch into place.

2.Replace the four screws that secure the power supply to the back of the computer chassis.

3.Replace the two hard drive bays.

4.Replace all hard drives installed in the interior hard drive bays (see Installing a Hard Drive).

5.Replace the optional hard drive fan, if applicable (see Installing the Optional Hard Drive Fan).

6.Reattach each of the DC power cables that were previously connected, carefully rerouting them as you found them.

7.Replace the computer cover (see Replacing the Computer Cover).

NOTICE: To connect a network cable, first plug the cable into the network port or device and then plug it into the computer.

8. Connect your computer and devices to electrical outlets, and then turn them on.

Front I/O Panel

Front I/O-Panel Components

1	external IEEE	2	external USB ports	3	power, diagnostics, hard drive, and
	1394 port		(2)		network activity LEDs
4	headphone	5	microphone	6	internal front panel I/O connector
	connector		connector
7	bottom LED	8	top LED connector	9	internal USB connector
	connector
10	power button	11	internal 1394	12	internal audio interface connector
	connector		connector

Removing the Front I/O Panel

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

1. Follow the procedures in Before You Begin.