my sony bravia KD-49X8005C doesnt turn on any more. when i press the power button on the tv or remote the led bar at the bottom of the tv comes on then fades out.

I managed to get it to turn on once by pressing and holding the on button and volume up button while switching the socket on. it reset the tv and i had to set it up again. 

however the following day it wouldnt turn on again. now i cant get it to come on at all.

any idea what could be wrong with the TV or a way to fix it.

i will add that the colour was slightly off (if i looked at the writing on the sky epg it was green not white) before this started happening, and the 1 time i got it back on it was back to normal.