Remove two 2.3 mm #00 screws holding the viewfinder LEDs. These will need to be properly aligned during reassembly.

Remove one 2.3 mm #00 screw.

Pull or pry off one 3.7 mm plastic retaining post.

Remove one 2.3 mm #00 screw.

Pull or pry off one 2.8 mm plastic retaining post.

Gently pull main PCB away from mirror box housing.