Check for a blue light at the top of the screen. The light indicates that the screen is receiving power. If the light is off, make sure the power cords on the back of the subwoofer are connected securely.
Select the PROJ (Projector) option on the remote control, then select S-UP to raise the screen.
The screen motor may have overheated if you repeatedly raised and lowered the screen. Let the motor cool for 5 to 10 minutes, then try operating the screen again.
Check that the blue light at the top of the screen flashes when you make a selection with the remote control. If the light does not flash, check for problems with the remote control. See Problems Using the Remote Control.