Dell OptiPlex 7490 All-In-One Service Manual page 11

Table 1. OptiPlex 7490 All-in-One screw list (continued)
Component
Camera assembly
Camera door
Heat sink—UMA
Heat sink—Discrete
Power-supply unit (PSU)
PSU fan
Rear-I/O bracket
System board
Speakers
Power-button board
Microphones
Side I/O-board shield
Side-I/O board
Antenna modules
Display panel
Middle frame
Audio board
Screw type
M3x5
M3x5
Captive screws
Captive screws
M3x5
M3x5
M3x5
M3x5
M3 4+7.1xZN
M3x5
M2x2.5
M3x5
M2.5x3.5
M2x2.5
M3x5
M3x5
M3x5
Quantity
2
2
5
9
2
2
4
9
9
1
4
2
2
2
12
16
1
Removing and installing components
Screw image
11