TV started making a buzzing noise at start up which gradually got worse ovre time until it would not shut off unless unplugged.

This tv unit have a colors wheel design into it.This tv problems,having loud squeling,buzzing noises or colors pictures are flashes black&white with the pictures.The tv colors wheel it is worn out and it is dying.The tv have a loud buzzing noises because the tv colors wheel it is worn out and warping out of it axis and it is spinning and hitting it steal frame box.The tv colors wheel sit way back of the tv behind many mechanical parts.Have no experience in mechanical works like take things aparts and putting it back again.Hire a tv tech. to change the colors wheel.