Blue shadow above writing and pictures on screen (by 2 users)

I have a panasonic, 49" hdtv 1080i, widescreen, ( off hand can't remeber model #, it's about 5 years old.
When the tv is on it is almost as if the blue convergence is out of sync, and when watching the tv there is a blue image of whats being displayed on the tv but about 4 inches higher on the screen, I have tried to use the remote convergence but it only moves the blue cross up not down.
Also when I use the manual convergence button in the front of the tv, I can fade it max it, but not correct it's position on the tv. To add when I max the blue coloring with the manual buttons in the fron of the tv to max the blue the screen looks as if it is bowed inwards. any help would be great, i was quoted by a few techs they said the buld is gone, which it can't be because it lights up the warning message does not come on and I can alter the blue color. This is a rear projection screen hdtv Same problem, larger Panasonic HDTV 52 inch Cinemavision. Have tried convergence fix, but didn't work.... suggestions?