The date and time are set up correctly.
I have a cable modem that is connected to a router. My other wireless laptops like Dell and even my ipad does work with this wireless router so it is not a wireless router issue
Its just that this MacBook Pro always displays Wi-Fi: Looking for networks
This worked well until the day before yesterday
Thanks for your comments
Looks like this is not just happening to me
I tried the Apple diagnostics it did not work. Tried powercycling the router and my cable modem still no resolution
Please note all my other wirless devices are working well including the ipad.
I can only get internet connectivity using the ethernet port
Remember this was working well till the day before yesterday.
Someone pls help !!!
Another issue is it's possible you just Software Updated and now can't connect to your WEP Encrypted router.
Apple is not allowing Mac's to connect to this insecure standard anymore.
Also about the time and date issue, both router and machine have to have matching time and dates to connect, even if they are wrong!
So if the router is getting it's time/date from one server that is having difficulties updating (third party routers don't use Apple's time servers) and it's thrown off
and if one has a Mac that is getting the correct time and date from Apple's servers (or vise versa), then you can see why one will not get a DCHP lease from their router.
I had this issue before and thus set my Mac's date a day back and it worked.
I tried the Apple diagnostics it did not work.
What do you mean it did not work! What were the results of the diagnostic tests?
Have you contacted your ISP to determine if the problem is on their end?
Have you changed your router channel? Sometimes this resolves wireless problems.
Your profile confirms you are using Lion. Check out the following:
I got it too, when I got to office #1, can't connect with DHCP, tried to restart, no, tried diagnostics, said 'network diagnostics can't fix this problem', had to use desktop Windows (boo) box; later at office #2, still can't connect with DHCP, even ethernet didn't seem to work (but i didn't try that too hard) but everyone around me (on macbook pros) is fine, had to use an old (slow) mac that was lying around .
the Kreykes wrote:
O. now i'm back home and it works!!
Head to System Preferences > Network > Airport > Advanced > Airport and use the "minus sign" to delete all your network connections.
Reboot and connect manually and when it asks to save it to Keychain do that.
When you get to work, do the same thing.
Sometimes people play jokes and copy your Mac's "MAC Address" and this won't allow you to connect to the local network as long as they are connected first.
Have this problem resolved
I took the laptop elsewhere and found that it works well
So I came back home disconnected the modem and router waited for 10 mins then reconnected them and now my wif-fi is working on the Macbook pro
What disturbs me is all other wireless devices like Dell , X-Box and even the ipad was working. Not sure why only the Macbook pro was not working