Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It won't power on just after the gurantee expires!!!

I bought a sony PCG-GRZ630 one and a half year ago, so did one of my friends. We were attracted by its lower price, large memory and large screen ..., and so on. Half a year later I met the first problem, the integrated Lan card didn't work properly. It was automatically disconnected occasionaly for unknown reasons. One year later, just after the gurantee expires, my friend's GRZ630 failed to power on, no matter how hard we try!! Just a few days ago, I had the same problem with mine. It was terrible! Fortunately, I got it powered on again after exchanging the position of the memory sticks. Anyway, it is the worst experience with this laptop. Just a nightmare!!Suggestion: NEVER buy a sony laptop any more!!!