IQC50H94W All three guns are lit and produce an image on the screen. In setup the red can be merged onto the blue to create purple. The green is curvy-plumb (vertical) Moving the gun magnets have no effect. Someone in another blog mentioned convergence ICs. Is this a probability?

Was the wvay color present before you did anything? Low voltage from the HV tranformer (flyback) an cause this type of behavior. The crosshair for the convergence set-up should be white when they are all lined-up. The varistor pack for the three tubes needs to be recqalibrated for paper white to achieve this. You should NEVER move the tube alighnment magnets on the neck of the tube unless you replaced the tube itself. The coil on the back can be moved left to right the account for bad cross alighment. Bow and Pin must be done on the convergence board. Slideing the coil away from the front of the tube will blur the image. A convergence board is probably not the root solution for an aging set with daily use. Zenith power supplies relatively last 5 to 7 years at best.

The convergence IC's should be the first suspect in any convergence issue. Hopefully you can place the magnets back where they were or you will have that alignment to deal with first.