this post was submitted on 26 Sep 2026
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The capacitors are the same ones that are in every desktop PC power supply.
The flyback is a complex transformer with the thick cable sending the high voltage to the tube's second anode.
The CRT itself can act like a giant capacitor. Eventually they figured out how to bleed the charge out when the TV is off.
1990s-2000s tubes: I discharge but don't worry too much. 1980s-1990s tubes: I discharge several times, over the course of an hour or two. Those Sanyos that Nintendo used hold a nasty charge that comes out with a big SNAP!
The way they bleed the charge off when the TV is powered off is through a very high resistance resistor. This works perfectly well most of the time, but those resistors can and do fail. The same is true for microwaves, which also have flyback circuits. Always treat these things like the bleedoff resistor has failed.