Thanks for the reply.
So the Service Tag is not necessary for the fan change? Service Tag doesn't have to do with the Model Fan?
Also, the noise is different now. When it was still new, the real noise I only heard was the sound of the air blowing but now I hear strange noise which sounds high with the fan spinning fast and sounds lower when it spins lower. The noise sound is also noisy when the fan starts to spin after I switch on the laptop or at any time after not spinning.
So this noise is also normal?
But when it may stop spinning you say? The fan stop spinning for what reason? And is there any solution if that happens rather than replacing the fan?