OptiPlex 7490 All-In-One Service Manual

PDF

Screw list

NOTE When removing screws from a component, it is recommended to note the screw type, the quantity of screws, and then place them in a screw storage box. This is to ensure that the correct number of screws and correct screw type is restored when the component is replaced.

NOTE Some systems have magnetic surfaces. Ensure that the screws are not left attached to such surface when replacing a component.

NOTE Screw color may vary with the configuration ordered.

Table 1. OptiPlex 7490 All-in-One screw listOptiPlex 7490 All-in-One screw list
Component	Screw type	Quantity	Screw image
Cable cover—optional	M3x9	1
System-board shield	M3x5	5
Bottom cover	M3x5	4
M.2 2230 solid-state drive	M2x2.5	1
M.2 2280 solid-state drive/Intel Optane memory	M2x2.5	1
System fan	M3x5	3
Wireless-card shield	M2x2.5	2
Wireless card	M2x2.5	1
Camera assembly	M3x5	2
Camera door	M3x5	2
Heat sink—UMA	Captive screws	5
Heat sink—Discrete	Captive screws	9
Power-supply unit (PSU)	M3x5	2
PSU fan	M3x5	2
Rear-I/O bracket	M3x5	4
System board	M3x5	9
Speakers	M3 4+7.1xZN	9
Power-button board	M3x5	1
Microphones	M2x2.5	4
Side I/O-board shield	M3x5	2
Side-I/O board	M2.5x3.5	2
Antenna modules	M2x2.5	2
Display panel	M3x5	12
Middle frame	M3x5	16
Audio board	M3x5	1