Fan starts and stops very frequently with no reason

[arthur6742]

PCG-FX604, AMD Duron 1100 MHz, Windows XP SP2

The fan starts and stops very frequently, sometimes about 30-40 times a minute. There seems to be a problem with the fan-control. It seems to start with no need, because it stops less than a second later, starts again, and so on.

AMD PowerNow! works fine. The CPU-Speed is down to 500MHz when no program is running. The energy-option is set to 'minimum energy use' or however this option is called in English.

The problem does not seem to be infected by software-installations, because it appeared right after I bought the notebook when only the preinstalled software was installed and was not solved by windows xp service pack 1 or 2. There is no bios update available.

Is there anybody who has the same problem and fixed it?

[robpaxton]

Often this is due to the cooling fans being clogged up. Try cleaning them with a vacuum or air duster. It can be surprising how much dust etc gets into the fans.

[arthur6742]

Thanx for your request, but the problem exits, since the notebook was brandnew. I don't think sony sold me a notebook with a dirty fan.

[robpaxton]

Sorry, I assumed the fault was a new one.

[kee-lo_]

If it's under warranty have Sony look at it.

[arthur6742]

Well, that's what I should have done 2 1/2 years ago. It would be good to know if there is anybody with a similar problem.

[kee-lo_]

The best thing is to see if anyone in the Yellow Pages can fix it for a decent price.

Get a few quotes and play one against the other "oh right, well this store said they can do it for £130", works.

[armanif]

My FX604 has the same behaviour. It annoys me but I can't say it's a technical issue... I simply don't know even if it sounds really strange. Moreover I cannot see divx moves as the laptop crashes in 30 secs.
Cheers