My screen is discolored and blurry. Please advise..

Sounds like contaminated fluid. Each of the 3 crt's in your set have coolant to keep them cool. This coolant over time gets contaminated and causes extreme blurry picture. ITs extremely common on the Magnavoxs. Its also a pretty big job. Replacing the fluid isnt too difficult but because the tubes have to be removed it means both physical alignment and electronic alignment will be necessary. Also dont remove the green tube until you have done both the blue and red and aligned them to the green. Then do the green.. I hated doing that job lol.. I dont recommend you trying it and probably wouldnt be cost effective to pay a shop to do it either.. I recommend buying a new set... Sorry