The problem could be with your computer's video card. Projected colors don't match the computer or video player's colors. See Display Menu in the User's Guide. Lamp seems to be getting dimmer. The lamp begins to lose brightness with time.
Lamp shuts off.
A minor power surge may cause the lamp to shut off. Unplug the projector, wait at least one minute, then plug it back in. Some inexpensive cables are not compatible with the projector. Be sure to use good quality cables that seat securely into the S-Video connection. This can happen when the projector can't syncronize with the computer source.