Panasonic TC-P50C1 50-inch y main?

[mcross]

I have a Panasonic VIERA C1 Series TC-P50C1 50-inch . working fine then one day it just shows top 4''s or so, rest total dark., Voltages all within spec's. tried all the norm, ribbons, cleaned ect,,,
Will post pic;s soon.
Mike