Acer Aspire G7750 Series Service Manual page 63

14. Remove the four screws (G) that secure the power supply to the chassis.
Screw (Quantity) Color Torque Part No.
M Hex #6-32 L5 BZN (4) Black 5.5 to 6.5 kgf-cm 86.00J59.A60
15. Lift the power supply module out of the chassis.
Chapter 3 55