Fans on the fritz

So I have a mid 2010 Intel imac with fan issues. I just replaced the HD and installed Lion, shorty after the install once I was getting acclimated with the new interface my CPU, HDD and Optical drive fans started running at full blast. I did some investigating and found out that replacing the HD may result in an increased fan speed, but not sure why the other two fans are running at high. I have istat and the temperatures are normal just not the fans. Does anyone have the same issue and or can anyone help?

Take it in for repair.

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    i have only been using my macbook for the last two months,yesterday before turning it off ,or shutting it down i revised the batterie charge and it had 97% charge so i shut the computer with the apple icon and shut computer off . four hours later could not turn it on , i read previous entries on the isue and there was a sucseful result ... i believe the first idea was to press power switch for five seconds unpluging it previously from the wall ,and try after ? did it two times ,but nothing, then on the prosses of resseting the cistem..SSsomething ,it mention pressing control and something else at same time ,to force quit anything that might be still running ( i notice then that the fans or the fan was making a noice.then press power for ten seconds and i could heard the fans off . i tried two times the reset option especific for the mac air with non remomable batteries ,but it still does not turn on ... i am very fustrated as the last two months have been very painful ,for i am very much a mac starter and at my age learning does not came easy ,and just as i am getting to enjoy the diference ... dead new toy   . can someone please advise? but regardless of .thank you . is unfortunate approching this community because of a need , but at the same time glad to know there is more than a shop assistant out there .thank you all .

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    Dear John,
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