4-2 Service Mode
HD20/HD200X/HD2200/HD20LV projector has two kinds of service mode, use different
ways to get into each service mode:
1. Turn on the projector
2. (1) Press “Power”, “Left”, “Up” and “Down” button sequentially to get into service mode 1.
(2) Press “Power”, “Left”, “Left” and “Up” button sequentially to get into service mode 2.

El manual lo puedes obtener de aqui

O de aqui

Lo que he puesto arriba está en la página 33.