PowerLite 73c Multimedia Projector

The lighting in the room or the angle you are pointing at may be affecting the infra-red signal from reaching the projector properly. Try replacing the batteries. Follow these steps to replace the battery:

1. Press the tab towards the center of the remote and slide the battery tray out of the remote control.

2. Remove the old battery and insert a CR2025 lithium watch battery as shown.

3. Slide the battery tray back into the remote.