Dell Precision 7740 Service Manual

Installing the system board

1. To install the system board:
   1. Align the system board into its original position on the system [1, 2].
   2. Replace the 2 (M2.5x5.0) screws to secure the system board in place [3].
      
   3. Connect the LED board cable [1], speaker cable [2] and touchpad cable [3] to the connectors on the system board.
   4. Place the Type-C USB bracket onto its slot on the system [4].
   5. Replace the 3 (M2.0x5.0) screws to secure the Type-C USB bracket to the system [5].
      
   6. Connect the power connector cable and battery cable to the connectors on the system board [1, 2].
      
2. Install the:
   1. graphic card
   2. heat sink assembly
   3. palmrest
   4. SIM card
   5. M.2 SSD card
   6. WWAN card
   7. WLAN card
   8. primary memory
   9. secondary memory
   10. base cover
   11. keyboard
   12. hard drive interposer board
   13. hard drive
   14. battery
   15. battery cover
   16. SD card
3. Follow the procedure in After working inside your computer.