What is accessed through that door? The door is probably going to have to be forced open and that may possibly break the latch mechanism. How old is the camera? IF you can force the door open and it doesn’t break any parts, maybe then you can try things like lubricating the mechanism. You may just have to find another Polaroid camera and toss that one.
Most problems with intermittent headphones occur when the cord is flexed many times and creates an internal break in wires inside cable. You may need to replace cable if possible.
This usually indicates that one blade of fan is hitting on front or back of fan. Don’t know if accessible but if so maybe you can bend the blade away from where it’s hitting.
