MacBook will not join Airport network

I am flummoxed. My MacBook will not join my Airport Extreme network. It was fine this morning. I have restarted the MacBook. I have restarted the Airport base station. My iPhone is connecting to the network fine. My TV is connecting to the network fine. My G4 is connecting to the network fine. So, it appears there is some issue with the MacBook itself. Any ideas what could be the issue?

Dr. Kellie wrote:
I am flummoxed.
Are you a Nero Wolfe fan?
My MacBook will not join my Airport Extreme network. It was fine this morning. I have restarted the MacBook. I have restarted the Airport base station. My iPhone is connecting to the network fine. My TV is connecting to the network fine. My G4 is connecting to the network fine. So, it appears there is some issue with the MacBook itself. Any ideas what could be the issue?
First, either update your profile or your OS to 10.5.6. There have been many bug fixes since 10.5.2 and some WiFi updates require the latest Leopard version.
That being said, check your network preferences.
Do you have a rational IP Address?
If you are using an encrypted WiFi, you can temporarily turn off the encryption and see if the MB can join the network. If so, it's an encryption issue. If not, turn the encryption back on and we will have to look elsewhere.
BTW, you should be using WPA since WEP has long ago been compromised and is useless, but thats a side thing right now.
On the MB, I would run disk utility and repair permissions for starters.

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Message was edited by: .jacob

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Message was edited by: .jacob

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~~~~~~~~~~~~~~~~~~~~~~~~~
iOS 6 Wifi Problems/Fixes
Fix For iOS 6 WiFi Problems?
http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
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~~~~~~~~~~~~~~~
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Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
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I am being baffled by a network problem.
I have 2 Macs, a MBP 17 inch running Snow Leopard and an old Powerbook G4 running 10.4. Both connect to a no security (ie no password wireless) network at home. "Suddenly" the MBP will not join the wireless network (A DSL model D-Link). Error message when running diagnostics of "Unable to join Airport network.....". The G4 works just fine.
Have tried rebooting both devices ie the MBP and the D-Link. The MBP will work fine with a cable attached to the D-Link but not wirelessly!
Also, the MBP can see the Powerbook in the FINDER under "Shared".
Any ideas?
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BF

Yeah, thanks Bob, I got my MBP Safari to talk to D-Link via the http://10.1.1.1 address, put in a WEP password. Saved the changes and restarted the router. When I connect via Airport it asks for a password - I type it in then it times out. Then I went to the Powerbook and the Vista machine and they connected fine. I used my iphone and told it the password and it also worked fine.
I prefixed it on my MBP with $ and without $ - all to no avail. I am starting to think maybe the MBP wants a WPA password for some reason. It worked fine until last night! Very strange indeed. Any more ideas?
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There are couple of things to check out. First, make sure that you are actually connected to your network. If you live in an area that has a lot of wireless signals around, then there is bound to be an un-configured open network that your machine maybe jumping on first. Second, check what i.p. your router is giving you. There are two things this can tell us.
1. If it is in the self assigned range, which I think is 169.254.0.1 – 169.254.254.254, then there is more than likely a failure in the Macbook's and router's DHCP negotiation (which means the router is not giving the macbook local i.p. address.) Do a web search with these words: linksys wrt54g macbook DHCP
Sometimes Linksys and apple don't play fair.
2. If the i.p. is in the 192.168.x.x or 10.0.x.x "range", or subnet to be technical, then make sure all the other computers are on that same subnet. If the macbook is NOT on the same subnet as the others then there is a possibility that there is another network with the same name close to your location. If so, your macbook is more than likely jumping on that network. It is rare that they will show up separate on the airport list. you can eliminate this and even more problems caused by redundant SSID's by just changing the name of your network. If the macbook does have the same subnet, then we are looking at other issues.
Start with this and see how it goes.

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