I am trying to fix my brother-in-law's laptop hp pavilion dv6, windows 7 (64-bit). He is having problems connecting to the internet through the laptop wifi. It shows all the surrounding routers including his, but won't connect either way. He has a sprint wifi card that he uses to connect with no problems. Now, if that is working, than what is causing the laptop wifi not to work? I even looked on the hp website for any answers, and this is what I have read from other people using the same model:
1) Having the laptop plugged in the ac for most of the time might cause the motherboard to overheat and cause the wifi to not function. (My brother-in-laws does kinda have it plugged in most of the time, that I have seen.)
2) Might have to download the new version of the Bios, wireless assistant, and the wireless drivers off the hp website. Install software, reboot and just incase re-install the bios and that should fix the problem.
3) The motherboard might be the problem, might have to fix or buy a new motherboard. (Heh! Ahhhhh, I hope not, it's not even 6 months old.)

Well if anybody out there have any suggestions as to how this problem can be fixed, please feel free to throw them my way.