before swapping it out, lock it out and take a look very closely at the side board- theres a circular array of pins that go to the flyback transformer, I'd say 3/4 of the bad screens Ive seen you could fix by simply taking a soldering iron and remelting the solder on those pins- very common failure is there will be little ringlike cracks around the pins- gotta look close to see them, but it happens a lot.