On my Panny D4, you can just press the Button (Square box with a + sign in it) under the RED stand-by button on the remote control. This tells you what the current Input signal is been displayed. Eg. RGB or PC or AV etc..
Thanks for the reply, but what I was meaning was the signal type. i.e 480i, 480p etc etc I know the Pioneers do this but just wondering if the panny's do too. The real reason is just to check my DVD player is definately outputting everything pro scan.
Gordon, when you say that you can't say how to enter the service menu, is this some sort of dealer contractual thing, or are you just wary of giving people enough information to mess up their screens (I've seen posts on here by people who switched off their remotes!)? It only takes a few minutes with google to find the service manual on the web. I have downloaded it for completeness, but am too scared to play ;-)