Dell OptiPlex 3050 Owner's Manual page 28

h memory module
i WLAN card
j heat sink
k system fan
l processor
3 Disconnect following cables:
a SATA ODD cable [1]
b VGA serial cable [2]
c VGA cable [3]
d Speaker cable [4]
e LCD link bar cable [5]
f LCD assembly [6]
g Heat sink cable [7]
h LCD assembly [8]
4 To remove system board:
a Remove M3 0.5x5 screws that secure the system board to release it from the chassis [1]
b Slide the system board from the chassis [2].
28 Removing and installing components