Thanks guys.

oops what was that you said about the sat nav light?! didnt check it before disconecting battery - what happens if it's on? ignition had been off a while though?

Anyway, seat bolts removed so I could tip it backwards to check the wiring - there's a lot going on under there!

On first inspection everything seems to look ok - cant see any obviously loose or disconnected plugs....except for one black one that is at the start where the wiring meets the seat frame and is hanging completely loose - but I cant see exactly where or if this should plug in anywhere - it almost looks like ot is supposed to be like this? like a diagnostic connector or something? could this be the case or could this be the loose rogue plug?

as an aside - can the TV system be overiden so that the TV can be used on the move? This is not for me to use/watch as the driver, but so my wife and kids can watch it.

Cheers