Just had gimbal ribbon cable replaced due to hard landing. Everything checked out perfect at repair facility. Upon receiving via UPS, I attempted to test-fly before using for project. After changing ipad wifi setting to phantom then wifi extender - RC - Phantom power-up sequence, the camera housing responded and adjusted to level position. After a very few seconds, the camera housing would drop down to original position. Appeared that wifi connection was made, then lost. Attempting to make connection with DJI app, message on screen stated "Connection to Phantom failed". Everything was fully charged. Checked to insure connectors from body to gimbal housing were secure. Any suggestions to resolve sudden loss of connection would be appreciated.