not responding

Problem? I cannot understand what went wrong. Pilot error, rookie mistake, interference ? Was unit in a crash? Yes, I think this qualifies as a "soft" crash since it landed on water and sank. After 10 hours, a diver was able to recover the unit but I don't think I will try to make it fly...

Hello everyone. To give you more information i'll start from what i did. I've been installing external antenna mode to rc. When i finished one of the wires just came off with antenna (deflect probably) and i decide to go back o stock while i'm waiting for a new wires (pics attached)...