Dell OptiPlex 7770 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 nine 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]
   • Backlight cable [2]
   • Camera cable [3]
   • System fan cable [4]
   • PSU fan cable [5]
   • Touch cable [6]
   
   • SIO_signal,SIO power,INT_ speaker, and DMIC cables [1]
   • Power button board cable [2]
   • LVDS cable [3]
   
4. Install the following components:
   1. I/O bracket
   2. Base cover
   3. Processor
   4. Heat sink
   5. WLAN card
   6. SSD
   7. Intel Optane
   8. System board shield
   9. Memory
   10. Hard drive
   11. Back cover
   12. Stand
5. Follow the procedure in After working inside your computer