Dell Precision 420 - Manual (Page 27)

Interior Service Label
Figure 4 shows the location of the interior service label on the inside of the system cover. This label shows the location of components within the
chassis and locations of system board components and connectors. It also contains an important notice that provides instructions you need to
follow to help prevent damage to your system board while you troubleshoot and service the computer system.
Figure 4. Interior Service Label
Internal View
Figure 5 shows the chassis with the cover removed to help you orient yourself when you work inside the computer.
Figure 5. Orientation View
Front Panel
To access some drive bays in the mini tower chassis, you must first remove the front panel. To remove the front panel, you first must remove the
computer cover (see "
Computer Cover "). With the cover removed, release the panel by pressing the green tab release marked with the icon (see
Figure 6 ).
Figure 6. Front Panel Removal
1 Externally
accessible drive
bays
2 Hard-disk drive
cage
3 Chassis
intrusion switch
4 Power supply
5 Hard-disk drive
interface cable
6 DC power cable
7 AGP card brace
8 Security cable
slot
9 Padlock ring
10 AC power
receptacle
11 Expansion card
slots
12 I/O panel
connectors