This is a symptom of what is generally a leaky or open filter capacitor in the vertical sweep circuit. Vertical foldover, where the image actually is reflected upside down an inch or so into the top of the picture, is common in this problem. There is an IC that controls the signal and sometimes it needs to be replaced, but more often it's one of the filter capacitors nearby. Any competent technician can fix this problem and the capacitors only cost $2-3 or so if you can find the correct value at Radio Shack (that's if you pay full retail for them). A good service tech will probably have these on hand. Testing them is easiest with what's called an ESR meter (stands for Equivalent Series Resistance) and the better ones don't require you to unsolder them from the circuit board before testing. The most expensive part of this repair is going to be the technician's labor. They're good TV's, this is just a problem common to most TV's in general - mostly due to aging of the capacitors from years of heat. A higher quality replacement capacitor will solve the problem for the life of the set.
My 32inch Toshiba T V Has Horizontal Lines Fore The First Two Or Three Inches At The Top Of The Screen . Is There A Cure ?
I fixed the same problem on my Toshiba 27DF46 standard definition CRT TV by replacing capacitor C407 (100uF 35V) with one from Radio Shack ($1.29). The faulty capacitor looked very normal, no signs of leakage or bulge on top. This TV holds charge when unplugged. I had to be very careful in discharging to ground the tube anode and the ground contact on the main circuit board. Also discharge the big capacitors before working on the main circuit board.
Your not alone....same with my Toshiba, and its only about 3 years old. I have not found a cure yet......except I got frustrated and bought a 40 inch LCD Samsung and put that Toshiba in the basement.