U550 annoying cpu fan on new computer! help!

hey,
i'm a little desprate about it, today i've bought a new notebook call Ideapad u550-2958 (T6600, 4 giga-ram, 500gb nvidia 210m).
I opened up my computer and started to work, but i've notice that my notebook cpu fan is acting very strange, even though i didn't do anything that count "heavy" the cpu fan worked in high speed for a short duration and then go silent again (but! only for 3 secnods) and then started again. the odd thing is that i'm just on the web and fill like my mom using a giagentic vacuum cleaner.
So my qusetion is :
 this is how u500 cpu fan should work? or you think that it's a technical problem.
i read about similar problem with the a s10 this is the same case
thank you,
eldad

i have the same problem with an U450p.
Measuring the temperature with CoreTemp i found out that the fan in my notebook turns on and off at 35°C (which is far too low). Because it is the same temperature for on and off, the fan is only running for a couple of seconds, turns off for a couple of seconds and turns an again and so on...
I did not find a solution yet and the telephone support line told me to send it in. I believe this can only be fixed by releasing a new BIOS, but I will send it to Lenovo anyway, as soon as I don't need it for  a while (I am going to holiday in february).
The new BIOS should turn on the fan at 55°C or so, keep it on at low speed until reaching 45°C. Only for temperatures above 60°C the fan should run at full speed I think.

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