Satellite A300 - hiss of the cyclic cooling system

I have a Satellite * a300-1mz *.
I ask you if it's normal if I hear a * cyclical whistling * of the * cooling system * on the left side of the laptop (where is the heatsink and processor)

It is very * noise * because it is not regular, it seems sine (it comes and goes every 2 seconds)
It appears a * eletrical noise *... and it's very udible throughout the night serve...?
I'm very worried...

I just try to use a * compressed air * remove dust, but it's still the same...
Do you have more tips?
Thks

> My same problem anyone?
No, I have Satellite A300-1LI in front of me. I have more than one year and use it about 10 hours a day. I put it to minimum level in the cooling method and portable works extremely silent.

If you are so concerned about the nearest Toshiba service visit and ask for advice.
It is not easy to give an answer here in the forum. Let the service people to hear how it sounds.

Tags: Toshiba

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