Maximum fan speed when airport cable is connected

Hi to all. I have a MacBook Pro 13" mid 2010 2.66GHz . I use it with the wifi/iSigh cable disconnected. When I plug this flat cable, the fan ran at full speed and it took too much time to get started. So I unplugged the cable that connects the motherboard with the wifi card, bluetooth and iSight camera and now the Mac works well, without wifi, BT and iSight.

What could be the cause? I think the problem could be wifi board failed. I chaned the cable with a new one. My macbook now is no wifi, and in this state is no longer a laptop ... I hope that any of you have experience on this issue.