Grey lines on the right hand side then cycles through colours
My Toshiba CT-8533 TV, once turned on, after about 2 minutes it will lose the image when grey lines on the right start to appear. The sound is still running, it will then cycle through different colours - white, red, blue, green. The only way to stop this is to turn the TV off, wait a few minutes, then back on. However this has stopped working now and as soon as the TV is on, it cycles through the colours. It's just over a year old, is there anything I can do to fix this?