Yes, turn on the sound sound (DVD) player, go into the menu and change the input setting to ??? Until the sound comes out the five speakers. I think it is set to aux, but not sure.
Holly, Check you shore power, sounds like you are drawing too many amps and drawing down the voltage when the compress come on. Check your power plug and see if it's getting warm. If it is then get a volt meter and check out the voltage at the plugJim