Removing the Power Supply
Step 1: Remove the PTFE Tube Bracket, Filament Buffer, and Rear Panel Refer to the following Wiki disassembly guides to remove the PTFE tube bracket, filament buffer, and rear panel in sequence.
Removing the Power Supply
Step 1: Remove the PTFE Tube Bracket, Filament Buffer, and Rear Panel Refer to the following Wiki disassembly guides to remove the PTFE tube bracket, filament buffer, and rear panel in sequence. 
https://wiki.bambulab.com/en/p2s/maintenance/replace-ptfe-tube-bracket
https://wiki.bambulab.com/en/p2s/maintenance/replace-filament-buffer
https://wiki.bambulab.com/en/p2s/maintenance/replace-rear-panel

Step 2: Remove the Purge Chute
Use an H1.5 Allen key to remove the four fixing screws (BT2×5), then remove the purge chute.

Step 3: Remove the Power Supply Cover
Use an H1.5 Allen key to remove the two screws (BT2×5) securing the heatbed wire clamp, then remove the clamp.
Use an H1.5 Allen key to remove the five power supply protection cover fixing screws (BT2×5) one by one. Then remove the power supply protection cover and set it aside. The heatbed wires do not need to be removed from the power supply cover, as this will facilitate the subsequent removal of the power supply.
Slide the power supply cover from right to left and then remove it.

Step 4: Remove the Power Supply
Use a Phillips screwdriver to loosen the screws on the power cable connector and remove the five cables from the power supply one by one.
Use an H2.0 Allen key to remove the two power supply fixing screws (BT2x5), and then remove the power supply.