Dell OptiPlex 5270 All-in-One Service Manual

Installing the input and output board

1. To replace the I/O board:
   1. Place and align the Input and Output board (I/O) board onto the display assembly base [1].
   2. Replace the two screws (M3x5) that secure the I/O board to the display assembly base [2].
   3. Route the headset port cable through the routing guide on the I/O board [3].
      
2. To replace the I/O board shield:
   1. Place and align the screw slots on the I/O board shield to the slots on the display assembly base [1].
   2. Replace the two screws (M3x5) that secure the I/O board shield to the display assembly base [2].
   3. Route the headset port cable, I/O board cable, and I/O board power cable through the routing guides on the display assembly base [3].
   4. Connect the I/O board cable, I/O board power cable, and headset port cable to the system board [4].
      
3. Install the following components:
   1. Speakers
   2. I/O bracket
   3. Base cover
   4. System board shield
   5. Back cover
   6. Stand
4. Follow the procedure in After working inside your computer.