After some thought...I have to be of the opinion that smacking that tube with a brommhandle is not fixing it, and now that it is working the problem has been made more difficult to track down as a done out the door fix, and to isolate the short now you are looking at a mutiburst pattern generator as to have some control over the color and refind the original problem not to mention the other guns haven't been cleaned or balanced...Not everyone has a rejuvenator this is true, but if you can't find one cheap, you just ain't trying very hard, or flat out don't even want one...If I was to guess, that tube will be worse next time, and will most likely even burn the screen.