Dell OptiPlex 7770 All In One OptiPlex 7770 All-in-One Service Manual - Page 55
Power supply unit - PSU, Removing the power supply unit -PSU
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4. Install the following components: a) System board shield b) Back cover c) Cable cover d) Stand 5. Follow the procedure in After working inside your computer. Power supply unit - PSU Removing the power supply unit -PSU 1. Follow the procedure in Before working inside your computer. 2. Remove the following components: a) Stand b) Back cover c) System board shield d) Base cover 3. To release the PSU cable: a) Remove the single (M3x5) screw securing the power supply socket to the I/O bracket [1]. b) Slide the power supply socket away to remove it from the system [2]. c) Unroute the power supply cables from the retention clips in the chassis [3]. d) Disconnect the power supply cable from the socket on the system board [4]. NOTE: Press the clip downward to release the power supply cable from the system board. Removing and Installing components 55