Hi folks The fan on my A150 (which is about 15 months old) has suddenly become a lot louder. It was fine last night, but when I swtiched it on today, the fan is 4 or 5 times louder than normal. It's now louder than any laptop I've owned before :( I've tried blowing some air into the side vent, using a Giottos Air Rocket, but that didn't solve the problem. Does anyone know if the fan is a replaceable part? Thanks!