Installing the power supply unit
Steps
1. Insert the PSU into the PSU slot and slide it towards the back of the computer until it clicks into place [1].
2. Replace the four #6-32x1/4'' screws to secure the PSU to the computer [2].
3. Place the power supply bracket [3] and tighten the two #6-32x1/4'' screws to secure the PSU to the computer [4].
4. Connect the hard drive power cable [5]
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Disassembly and reassembly