Lenovo ThinkStation P300 - Manual (Page 115)

Figure 53. Power connectors on the system board
7. Release the power supply assembly cables from any cable clips or ties that secure the cables to the
chassis.
8. At the rear of the computer, remove the three screws that secure the power supply assembly. Press the
power supply clip 1 downward to release the power supply assembly and then slide the power supply
assembly to the front of the computer. Lift the power supply assembly out of the computer.
Chapter 9 . Installing or replacing hardware 103