Had the same problem and then it went completely. I bought a new power board from Ebay and when I plug in all I get is a sizzling sound. Tried lots of websites but none has come up with an answer. Being an Older person I' loath to buy another T.V. until I've tried all avenues.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix televisions.