I had to repair a Sony Vaio notebook displayed symptoms of overheating because of dust: very noisy fans and random shutdowns.

The Sony support page for PCGFRV31 does not provide a service manual. So I had to go back to the trusty old google. The two most helpful pages were:
A guy taking apart his Vaio, a different model, but helpful nevertheless
A company that’s charging $150 to repair your Vaio laptop.

There were a couple of dust bunnies inside of the heatsink and I almost hit a wall when I couldn’t (at first) remove the CPU from the heatsink because it was glued to it. With the use of a hammer and a razor blade – that’s everyone in the business uses, no kidding – I managed to get it off from the heatsink.

When it booted up I was the happiest man on the planet. I always have a feeling of joy when I fix a computer problem, but with that laptop it was really a fight – man vs machine to fix it.