Dell OptiPlex 5270 All-in-One Service Manual

Removing the system board

1. Follow the procedure in Before working inside your computer.
2. Remove the following components:
   1. Stand
   2. Back cover
   3. Hard drive
   4. Memory
   5. System board shield
   6. Intel Optane
   7. SSD
   8. WLAN card
   9. System fan
   10. Heat sink
   11. Processor
   12. Base cover
   13. I/O bracket.
3. Disconnect the following cables from 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. Remove the eight screws (M3x5) that secure the system board to the display assembly base [1].
5. Lift the system board off the display assembly base [2].