Satellite C855-12Z - strange noise even if the cooler is off

Hello again,
I have a toshiba sattelite c855 12z, and i hear a strange noise even when toshiba pc health monitor shows that the cooler is off, it's like an air blowing inside the laptop , does it have 2 coolers? or can it be the hard disk? when i bought the laptop was very quiet, now i always hear this sound..
Help please

> Ok then, but the noise its not a vibration, or something grindig, it's just like a cooler, maybe gpu amd radeon 7610M has a cooler too?
Im not sure about that but from my knowledge some gaming / multimedia notebooks like Qosmio supported two cooling modules (CPU and GPU).
Dont think the same is available for C855 series so I assume its HDD or CPU cooling vent.

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Satellite C855-12Z - strange noise even if the cooler is off

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