Hi all i have found one of these going cheap however it has a fault. When it was first plugged in with it worked awesome and the picture was bright. Then it shut off and would not turn on again. Now if it is unplugged then plugged in it will start up again and then shut down. Can anybody hazard a guess as to what may be wrong and if so how much it will cost to repair? If its not too much i may buy this unit and spend some cash getting it running ok so any help would as ever be much appreciated. Cheers,John.