P3 pro remote flashing green on and off

[David Norrington]

I am having a problem with my phantom 3 remote GL300 B, the remote connects to the phantom and will fly no video feed if i use my GL300 C remote every thing is good including live video feed it appears the gl300B is not connecting to the camera

 

[alokbhargava]

Per your statement above, GL300B is defective. Most probably it's USB port is defective.

 

[kerrylaw7307]

I agree with "alokbhargava". Try a new USB cable. Another thought..... Did you just complete a firmware upgrade?