If you are happy playing around with the backs of tv's then you can get a replacement psu from http://www.lcdtvparts.co.uk/ .
Take a picture of the plug arrangement as 2 plugs can be put in wrong place.
I am a British TV engineer, and do not advocate repairs by unqualified persons. Taking the TV to shop or qualified person, with replacement psu , will keep the costs down.
Terry
May 2012