I had this same problem. Apparently it's fairly common with these older Hitachi Ultravision TVs. There is a bad fuse and capacitor. If you are willing to do some soldering it can be fixed at home. I bought a kit and instructions from TVRepairKits.com for about $30. Although I haven't worked on electronics since jr high school electric shop, it powered up as soon as I replaced the bad parts. Not very difficult, although the circuit board accumulated an amazing amount of dust in its 10+ years of use.
screen has a double image. looks like the green gun is bowed at the top and bottem of the screen....
(More)
screen has a double image. looks like the green gun is bowed at the top and bottem of the screen. hitachi 50ux58b