Panasonic Viera link disappeared!

hello  i to have had a problem with the viera menu failing to load   tv is a th42pz81b  4 year old with a panasonic sc-pt467 sound system    i did all the usual  factory reset   switch off at the mains over night   nothing worked   all i get is featuer not available  when i press viera on the remote    i bought the tv from john lewis  with a 5 year guarntee    so gave them a call    they are arranging for a panasonic engineer to call  and if i can.t be repaired  they will replace   so any one who bought their tv from JL   give them all you may be surprised    fodenman

Did anyone get to the bottom of this?

Got a 65" VT50 and purchased a Yamaha RXA2020. Ive plugged a HDMI cable from the HDMI ARC out on the receiver to the HDMI ARC In on the TV. When I hit Viera Link from the Panny menu, I see one option Viera Link Control and it is set to 'Player'. Nothing else is available.

A few tests:

HDMI Out ARC on receiver to HDMI In ARC on TV and NO bluray player connected - Viera Link = Feature Not Available

Same as above with a different HDMI cable = Feature Not Available

As soon as I plug in the Bluray player into the AV Receiver (AV1) and have the ARC connections as mentioned above, the Viera Link menu comes up but is restricted to Viera Link Control: Player.

Maybe I need to enable ARC on the Yamaha or something like that???

You beauty!!!! Thats exactly what I needed to do. Enable ARC in the receiver settings.