Thanks very much for your thoughts but worked it out by process of ilimination.
I'm using component in at 1080i and RGBHV out and that was fine.
Today was a little diferent as the screen was blue i.e. no signal at all from HD-DVD getting through the VP50.
Checking information button the VP50 was showing 1080i coming in and LED was blue to indicate processing was occuring.
The solution ?????
The deinterlacing options. Right or wrong the only way to get a picture is to change the setting to "Field Scale".
Manual covers all deinterlacing choices EXCEPT "Field Scale" so that was obviously no help but went though all possible changes and finally came across that one
Zooming in on King Kong HD-DVD as a picture test and very impressed with picture on my SD PW7 panel.
More playing over weekend but all major obstacles seem to have been sorted
Thanks again for all that had a read and especially to the guys who came up with possible solutions.
