Remove the lens, battery, grip, and memory cards from the camera body. Put a body cap on to prevent dust from entering the camera body. Prepare an ESD safe work area to prevent damage to the electronics.

The screws in this are J00 but PH00 will fit, just use caution with the driver to avoid stripping them out.

There are multiple screw lengths and thread types involved in this repair. I strongly recommend a magnetic whiteboard/parts tray and vis a vis/dry erase marker to keep track of where every screw comes from. Damage to the camera can result from putting the improper screw back into the wrong hole.