I purchased the TV Nov. 13, 2006. Lamp burnt out

Actually it seems that the defective part on your TV is not the Bulb. It's going to be the ballast. This is the board in charge of sending all the energy to the lamp so it can light up. http://www.discount-merchant.com/SearchResults.asp?Search=mitsubishi+ballast/?Click=48427 It's no an expensive board, actually they're running between 60 and 80 dlls.