jvc av-29sx1ek tv (with rm-c770 remote) pincushion Service Menu

[avform]

Would it be possible for someone to help me with the following please if possible:

I have inherited a jvc av-29sx1ek tv (with rm-c770 remote) and I need to adjust the pincushion. I assume its available from a 'hidden' Service Menu that I can't find?

On the web it says in a few forums that the Service Menu can me accessed by pressing the info "I" button and the mute button on the remote together - but I don't have a info "I" button ...

I have also tried the following sugestions:
display and cinema/game buttons on the remote. I don't have a display button so pressed cinema/game & display/cancel and nothing happened.

I also tried cinema/game and 16:9 - same again.

menu on tv remote then install then 4725

Hope someone can help!?