weird noise with the t61..

[neozengar]

Hi guys! I am new here, thanks for your help. I recently bought a think pad t61 in may. Until now, everything has been working perfectly except sometime when the laptop is not plugged. I heard some "zzZZ "sound coming out from the fan. I am not sure if that is a normal sound when the system is trying to cool itself without turning on the fan. Since this is my first laptop, I couldn't tell. Any help would be appreciated!

[erik]

could it be related to this?

Just about to buy a t61p, worried about the "noise issue"

[ryengineer]

If you're certain it's the fan then make sure your firmware is up to date:

BIOS Update Utility - Thinkpad T61 / T61p.