Dell OptiPlex 5270 All-in-One Service Manual

Installing the system board

1. Align the screw slots on the system board with the screw slots on the display assembly base [1].
2. Replace the eight screws (M3x5) that secure the system board to the display assembly base [2].
   
3. Connect the following cables to the system board:
   • Power supply unit cable [1]
   • Camera cable [2]
   • Touch cable [3]
   • SIO_power,SIO_signal, UAJ, INT_speaker,DMIC cables [4]
   • LVDC cable [5]
   • Power button board cable [6]
   • PSU fan cable [7]
   • Back light cable [8]
   
4. Install the following components:
   1. I/O bracket
   2. Base cover
   3. Processor
   4. Heat sink
   5. System fan
   6. WLAN card
   7. SSD
   8. Intel Optane
   9. System board shield
   10. Memory
   11. Hard drive
   12. Back cover
   13. Stand
5. Follow the procedure in After working inside your computer