I have a 2010 Altima that will not open on the driver's side front door. At first it wouldn't not open from the outside. I popped the door panel off and found the cable to be popped off. Put the cable back in and everything was fine for a couple of hours. After that, the door would not open from either side. Tonight I managed to get the door panel off from the inside without opening the door. I did not find any of the cables disconnected or anything. I can sit there and operate the handle cable with my hand right at the mechanism. I can feel and hear the lock moving but the door will not open. Any ideas on this one? I am at my wits end.