I've just finished my first Quad F450 build and as I tried to power it on for the first time my ESC's keep beeping and the FCU doesn't power on. It this happening cause of a faulty/wrong connection I did or do I have an issue with something from my components? My build consists of :
1. Frame F450
2. Flight Controller Unit KK2.1.5
3. Motors x4
4. ESC's x4
Thanks in advance for any help and info you can provide.