Epson 503c - Manual (Page 25)

Using the Projector 19
4. Squeeze the lens cap tabs and remove the lens cap.
5. Press the red Power button on top of the projector.
The power light flashes green as the projector warms up, and the
projection lamp comes on in about 30 seconds. The power light
stays green.
caution
Do not use the projector with
the lens cap in place. The
heat generated by the lens can
damage the cap.
squeeze here
power light
Power
button
warning
Never look into the lens when
the lamp is on. This can
damage your eyes, and is
especially dangerous for
children.