Television and Home Theater

Have a Mitsubishi 52" Model #WD52527.  There are evenly spaced vertical white lines running top to bottom the entire width of the screen.  Other than the lines the colors in the picture appear fine.  This first started three weeks ago and only at start up.  After the set was on for a feww minutes they would go away.  Now they are there more than they are not.  I want to have some idea of what it is before I call the tech to come to repair it.  Your help on knowing this is appreciated.  Thank you, bob

i have a 2001 56" Hitachi HD tv, model # 53UWX10B and while i was watching tv yesterday, the colors (red green blue) were no longer aligned and now i have a blurred image of all three colors rather than all three colors making 1 image. The red is a little to the left, the green is lower and to the right, and the blue is above the two. They are about 1 inch apart. Does this happen often, is this a readily fixable problem and can i do it myself? or is it worth it to call an ever-expensive repair guy? SOMEONE PLEASE HELP ME!!!

I have a Zenith B27A11Z with a heavy green tint in the picture which can't be fixed by adjusting the color scale on the regular menu, and I've been told I can fix the problem through the tv's service menu but I don't have a remote and entering the service mode by "pressing and holding the menu button, then press and hold the volume down and channel down (or right adjust) so all 3 are depressed simultaneously" doesn't work...Does anyone know how I access this service menu?  Also, would this Zenith tube be interchangable w