How to de-electricize a TV?

theres this pen thing its not used for writting lol it looks like a pen kinda and it detects were ther is electricity if you have like a homedepot of a electric place or sonstruction store ask them I don’t know if it works for tv’s or just houses

maby an anti static wrist band may help ?

A static wrist band really won’t do anything. Rubber Gloves are a good idea, they are what I use when I am opening up computers that have built-in CRT monitors. It is always a good idea to short out the capacitors like filleofspam says, make sure you aren’t touching the metal when you do it either.

The high voltage capacitors in the power supply can store an electrical charge for at least a few days after the TV is turned off. When I worked on CRT TVs I always shorted out the big capacitors with a screwdriver or piece of wire before working on them.