Hello Felicia,
I don't know about how to fix your TV, but I'd advise you to have a good read of the documents to ensure that there is no additional charges which will be applied to any repair of your TV.
The best thing you can do is to phone up the helpline and find out what help they are willing to offer you, which will probably be a visit from an engineer.
Although the Manufacturer's 1 year guarantee is expired, you are entitled to a product which will have a reasonable life expectency, which for a TV is way more than 14 months.
Good luck
Andrew Hill
December 2008