sound like u got a bad lock actuator or the cable connecting to the inner and outer door lock handles is disconnected sumhow. unless u can get it open u wont be able to get to take off the door panel. there is a way, try to take out the trim piece around the inner door lock handle, then u shud be able to see the cable, use a pair of long nose pliers to toggle with the cable then u shud be able to get it open to take the door panel off and see wat else is broken. hope this helps