Dell OptiPlex 5270 All-in-One Service Manual

Installing the power supply unit -PSU

1. To install the PSU:
   1. Align and slide the PSU, in to the slot on the display assembly base [1].
   2. Replace the single screw (M3x5) that secures the PSU to the chassis [2].
      
2. To install the PSU cable:
   1. Connect the power supply cable to the socket on the system board [1].
   2. Route back the power supply cables through the retention clips in the I/O bracket [2].
   3. Slide and replace the power supply socket on the chassis [3].
   4. Replace the single (M3x5) screw securing the power supply socket to the I/O bracket [4].
      
3. Install the following components:
   1. Base cover
   2. System board shield
   3. Back cover
   4. Stand
4. Follow the procedure in After working inside your computer.