Ok dont worry about red front lights,they irrelevant, they are just to show the user the front and nothing else
The rear arms are what's telling us what the drone is doing, so we got flashing yellow only on the rear so we dont get confused .
Do you have app installed ?
Can you navigate through app ok , under RC settings there's linking there too, have you tryed this yet, this in app process you have to move gimble wheel like the directional pictures it shows you to follow or it dont save or have you tryed this process and it just times out without linking,you get 60 sec to press link button before it times out in which you start process again . Does it complete or fail ?
Sorry for questions but it help fix or point us in right direction
There are only these 2 ways to link , in app or manual without app
Good effort on the gimble repair too