Dell Precision T1650 (Mid 2012) - Manual (Page 31)

6. Tilt the system board to 45–degrees, and lift the system board out of the computer.
Installing the System Board
1. Align the system board to the port connectors on the rear of the chassis and place the system board in the chassis.
2. Tighten the screws to secure the system board to the chassis.
3. Connect the cables to the system board.
4. Install the:
a) processor
b) heat sink
c) expansion card(s)
d) front panel
e) cover
5. Follow the procedures in After Working Inside Your Computer .
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