Setup: DJI Phantom 2 DJI iOSD Immersion TX 600mw (Immersion RC antenna) DJI Zenmuse H4-3D GoPro Hero 4 Black FlySight Black Pearl 32ch Receiver LCD (antenna provided) Plug+Play Wire I have used this setup reliably for about 6 months on and off. Put my kit away in the shed for ~ 2 months without any use. (somewhat coldish (35-40 at night) housed inside GPC backpack) Go to use setup and am not receiving any signal from the immersion tx just grey fuzz. The Black Pearl powers on searches/changes channels GoPro powers on/records fine I tested every combination of channels possible and same response, grey fuzz. (see attached image) [file]blackpearl/immersion channel freq|none[/file] The iOSD overlays will not even show up. The Transmitter does have a little red light that is ON. I have always been very careful to have antenna attached when powering on as well. I've hit a wall when it comes to troubleshooting, any advice? Should I purchase a new transmitter and Plug/Play cable? If I get a new transmitter should I upgrade to Black Mamba?