Dell Precision WorkStation 420 Service Manual page 28

To remove the front panel, perform the following steps:
1. While pressing the tab release marked with the icon, tilt the panel away from the chassis.
2. Disengage the two retaining hooks at the bottom of the panel.
3. Carefully pull the panel away from the chassis.
To replace the front panel, perform the following steps:
1. Fit the two retaining hooks on the panel into their corresponding slots at the bottom of the mini tower chassis (see
2. Rotate the top of the panel toward the chassis until the tabs on the top of the chassis snap into their corresponding slots on the panel.
Front-Panel Inserts
Figure 7. Front-Panel Insert Removal
To remove a 5.25-inch front-panel insert, perform the following steps:
1. Hold the front panel with the front facing you.
2. From the front of the front panel, use your thumbs to press inward on the insert until it snaps free of the cover.
To replace a 5.25-inch front-panel insert, position the two ring-tabs over the posts on the inside of the bay opening, and then press the ring tabs
over the posts.
1 Tab
release
2 Retaining
hooks (2)
1 Front panel
2 Posts (2)
3 Ring tabs (2)
4 Front-panel insert
Figure 6).