HELP!. JVC Broadcast Monitor No Picture Anymore

[lettuce]

I have a JVC BM H2000PN-K Broadcast monitor and up until last week was working just fine. Have turned it on today and have no picture at all not even the menu OSD shows up, if i press the overscan button i would usually get red, blue and green lines running across the top of the screen now all i get is 4 white lines. I have removed the case and the light emanating from the necktube is extremely dim which is supposed to be fair bright correct?.

If i press the 'Check Blue' button on front of the monitor which usually changes the whole screen blue all it does now is change the bottom white line (of the 4 whiles running across the top of the screen) to blue.

Its as if the screen display has collapsed!?? 

Any ideas what the issue could be?

[lettuce]

Here's a video showing the actually issue....


[youtube]https://www.youtube.com/watch?v=sh3F59znx8k&feature=youtu.be[/youtube]