Help with my Panasonic 65" plasma

[Mickey_Moose]

I seem to be having a problem with my Panasonic Plasma, Model: TH65PZ850U. If anyone has a schematic for this unit that would n=be nice as well.

There is a black bar in the lower left quadrant of the picture - but the image is affected in a box near it as well. See attached pictures the box is mostly dark but most of the time the color varies and is correct the odd time, but the black bar is always present.

Now would this be a problem with the y buffer board or something else? The problem just all of a sudden happened.

Thanks

[jts1957]

http://elektrotanya.com/panasonic_th-65pz850u_ch_gpf11du.pdf/download.html
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[Mickey_Moose]