Dell Precision 7740 Service Manual page 78

e. hard drive interposer board
f. keyboard
g. base cover
h. primary memory
i. secondary memory
j. WLAN card
k. WWAN card
l. M.2 SSD card
m. SIM card
n. palmrest
o. heat sink assembly
p. graphic card
3. To disconnect the system board:
a. Disconnect the power connector cable and battery cable from the connectors on the system board [1, 2].
b. Remove the 3 (M2.0x5.0) screws that secure the Type-C USB bracket to the system [1].
c. Remove the Type-C USB bracket from the system [2].
d. Disconnect the touchpad cable [3], speaker cable [4] and LED board cable [5] from the connectors on the system board.
78 Removing and installing components