My Macbook Pro stopped seeing my wireless router

I have several macs on a wireless LAN in my home and a couple of days ago my Macbook Pro suddenly just stopped seeing my wireless router. I have tried everything including deleting all favorite networks on this machine. Odd thing is, my iMac, iPad, iPhone all still see the wireless router and connect normally. Also, I am able to see other nearby networks on the affected Macbook Pro. This has me stumped, any suggestions welcome.

Try restarting the computer, if that doesnt work then repair the disk permissions using disk utility. If all of that does not work i would recommend backing up the computer and trying a restore. If none of that works it is most likely a hardware problem and will need to be serviced.