Have a 2000 40h w/deutz 1011f and pq controls. All of a sudden lifting up and down and swinging are kind of doing there own thing only from the platform. Ground controls work fine. Example: you can lift up then swing and boom will suddenly drop down. You can just step on pedal and may drop or swing without touching controls. I find this strange, unusual and extremely dangerous! I would appreciate any suggestions. I kind of lost on this one. Both controllers were fine till this happened. Thank you!!