So is there a fix for no FPV from the Phantom 2 vision? I have tried all the suggestions etc.  Hours of searching? How do you fix the problem?  Any help appreciated.  Right now I have a $1000.00 Flying toy !! I have 3 range extenders which I tried them all.  I have 3 batteries, a case, mods etc.  Everything worked fine and then nothing.

I was lucky. Have warranty.
They replaced wifimodule inside the drone.
Thats the problem :-/

Did you notice issue after a firmware update or a hard landing? What mobile device do you have? When you switched out the range extender, did it claim to bind successfully?

I had this problem with my Phantom 2 Vision, I bought it used and it came with an RE700 instead of an RE500.  I spoke with DJI several times, wasn't sure what to do, but finally I got an answer, guess I spoke with the right person.  I explained the Phantom worked perfectly until I updated the IOS Vision app, and it forced the RE firmware upgrade down.  After I applied it to the Phantom, the 5.8G stuff still worked, but the 2.4G stopped working.   i couldn't bind the RE700 to the camera.  Like a jerk I bought a new RE700 on EBay thinking that an untouched one would bind.  Nope, didn't do it.   I could ping both the camera and the RE before I went through the binding procedure.....they both showed as WIFI connections on my IPhone 6s.  So after explaining all this to tech support, they told me to send the whole thing in.  It took 3 weeks, but I received an email saying it was repaired and coming back.  Now I sent them a Phantom Vision, and they sent me a Phantom Vision Plus back.  Everything worked, they told me they didn't have parts for the Phantom Vision, so they had to slap a Vision Plus camera on mine.  I also own a P3, and was very pleased that I got the Vision Plus camera installed.....now both my Phantoms don't have the jitters in their videos!   The biggest surprise was they paid for shipping from Connecticut to Washington state and there was no charge for the repair.  So, whoever reads this, don't give up hope.   Their service is very good, it just took time to get this done.  That firmware upgrade obviously did more than mess up the RE.