I did a software upgrade on my ST16s controller and now just have a black screen. It was an OTA upgrade, indicated that there was a new RC release (0.36 to 0.38 I think) after download the icon on screen said "updating TX) then screen went black and did not come back - waited about 5 min. Switching off and back on now there is nothing after the first Yuneec logo for 5 sec, then goes black. Help.......