Check the blue light at the top of the screen. When the screen is raised, the light remains on. This indicates that the system is receiving power. If the light is not on, make sure your electrical outlet is working and isn’t controlled by a wall switch or timer.
Check that the power cords on the back of the subwoofer are connected securely.
Check the power switches on the back of the subwoofer. Make sure the PWR ON MODE switch is in the AUTO position and the MASTER POWER switch is turned on.