I just got my MacBook Pro back today from having the logic board replaced. While in the Apple store the Internet worked ok.
I got home and it was able to connect to my WiFi, but could not obtain an IP address. Instead it received a
I was able to browse and check my modem on
192.168.0.1, but still had no Internet access.
I also tried entering a manual IP address, but still no Internet access.
I disabled WiFi and plugged directly into the modem via an Ethernet cable. Similar problem: no IP address.
I did a factory reset of the modem, so there are no MAC filters or anything enabled.
I think the MAC address of the AirPort module stayed the same since it is not on the logic board.
I have another MacBook Pro and an iPhone, and both can obtain an IP address and access the Internet from the same modem. I have tried an NVRAM/PRAM reset too.
It seems really weird that the one laptop cannot access the Internet and obtain an IP address. Even more confusing is that entering a manual address does not help!