My 54" Colortrak will not come on

When I push the power button i get a buzzing noise then it goes right back off again. As its going off it will show the channel in the top right corner like its suppose to. I does this about 5 times then it shuts off for good any help with my problem. Ive unpluged it and pluged it back up and no differant. Even used the remote and pressed every button it has.