Dell Precision 3520 - Installing the System Board; Smartcard Module; Removing the Smartcard Reader

Installing the system board
1. Align the system board with the screw holders on the .
2. Tighten the M2x3 screws to secure the system board to the .
3. Place the metal USB-C bracket and tighten the M2x5 screws on the system board.
4. Connect the LED, mother board and touchpad cable to the system board.
5. Connect the display cable on the system board.
6. Place the eDP cable and metal bracket to system board and tighten the M2x3 screws to secure to the system board.
7. Install the:
a. chassis frame
b. heat sink assembly
c. memory module
d. SSD card
e. battery
f. base cover
g. SIM card module
8. Follow the procedure in After working inside your computer.
SmartCard module
Removing the SmartCard reader
1. Follow the procedure in Before working inside your computer.
2. Remove the:
a. base cover
b. battery
c. WLAN card
d. SSD card
e. chassis frame
3. To release the SmartCard reader:
a. Disconnect the SmartCard reader board cable from the connector on the system board [1].
b. Peel off the cable to release from the adhesive [2].
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Disassembly and reassembly