morri

This projector is about 5 years old and has already been cleaned once. It had a new bulb in about 3 months ago. When I switch it on the the power starts and then after about 10 seconds it goes off and the red warning light comes on. I was told by the support at Sanyo that it probably needs a new fan, however that will cost me in the region of £275 to get it repaired by them. I was wondering if anybody knows how to do it myself and where to get a fan from. Thanks, Alison