My 2008 vintage 3000 n200 laptop can find a wireless access point but will not connect the internet. Similarly it will find a network with an Ethernet cable plugged in but will not connect to the internet. The laptop has a Broadcom BCM94311MCG wireless card. I was told by a free lance computer repair guy that may be the problem. I might try to replace the card if I can find one at reasonable price.
The wireless problem started about 2 months ago. I basically gave up 6 weeks ago. Put the computer aside and let it rest a bit.
I am ready to try one last time before give up completely and trash the computer.