Magnavox PTV910 projection TV has blu...

I don't know about the buzz but when you need to replace the coolant it isn't the coolant that actually gets blurry, it is algae that grows over the crt. It kinda looks like snow if you look in there, maybe a tannish color on the blue tube. Usually only grows on green and blue tubes as plants don't grow under red light. Lots of directions available to replace the coolant but my recommendation would be to tip the tv over backwards, pull the plastic focusing assembly clean off catching the old coolant in a cake pan. Be sure not to let any leak on boards as it is conductive. Once those are off you will be able to wipe the CRTs off with a soft cloth. Pretty easy to fill them back up with a small funnel.

If you don't see any algae in there, there are six color coded dials that adjust focus electrically and brightness.

Dave

HOW DO I ADJUST COLOR BACK TO ORIGINAL CONFIGURATON?