Just to let you know. LED TV systems have been available for several months. They're no longer the sole province of the big outdoor screen. If the advertising can be believed they have better Hi Def than an LCD or Plasma and run on a lot less power
By the way, I agree the OP has either a blown inverter or the backlight has failed. In any case it's a job for an experienced tinkerer or a tech.
Goin' Fishin' (Some day)