A likely cause is a blown fuse inside the TV. The replacement should cost less than $1. If you want to replace it yourself be careful when you remove the back cover from the TV. High voltage remains in the TV even after it is unplugged, especially around the back of the picture tube. The screw next to where the power cord enters the back of the TV needs to be removed too. After the screws are out the back will slide off. The fuse is located on the circuit board next to where the power cord attaches. It's a small glass tube about an inch long with metal ends. Often, if it's burned out you will see a scortch mark near the center of the fuse. If it's burned out you will definately see that the fine wire, that runs end-to-end inside the tube, is broken in the middle. The fuse type may be printed on the circuit board (example: 125/250 V 6.3 A) and that info should be printed on the fuse itself. A Replacement fuse can be purchased at Radio Shack. Take the old fuse with you.
Craig F.
February 2008