Trinitron Horizontal Flicker

[Electronic M]

Originally Posted by mbates14

high volumes of dust = a high hour set.

Or a low hour set that spent its life in an oppressively dusty environment.

[Outland]

I tell you one thing: it's way too damn dusty in there. Blow a bunch of compressed air on everything. Dust can technically conduct electricity, depending on conditions.

Once I dust out the inside with compressed air, is there anything else I can do for preventative maintenance? I've heard it's a good idea not to use sets when it's hot or humid because that can lead to cracked solder joints.

My old Panasonic works perfectly (and flicker-free for what it's worth) since '94, but did develop a bad joint in the vertical section about 10 years ago that had to be repaired as well as a sticking power relay. I never dusted it out until the problem had surfaced.

It's definitely 60Hz hum related. It could be a bad filter cap in the power supply primary, or an external cause like a ground loop. Even things like light dimmers can cause this type of problem.

That was exactly it. I have isolated the flicker to the charger for my MacBook computer. When the charger isn't connected, the flicker disappears.