Flashing Green then two red lights on sony kdf e50a12u?

We have a sony kdf e50a12u Rear Projection TV last few days its been flickering on the picture it's had a new bulb 3 months ago been fine since apart from the flickering the past few days, the other day it went into standby and now flashes a green light then two flashes of a red light, I know this is a fault light and it has a meaning but cannot find out what it means anyone? Don't want to call someone out as its a £50 charge just to look at it and I cannot lifr it on my own to get it in to anyone. Thanks

Mandy
August 2012