My airport says self-assigned ip and won't connect to the wireless internet.

My airport says self-assigned ip and won't connect to the internet. It's set on Using DHCP, and nothing has changed router/internet wise. I tried it with the firewall off as well, but it still doesn't work. The ethernet works, and I tried setting the ip address manually to the same one as the router. It said it connected, but when I tried to load pages, etc. safari said I was not connected to the internet.
I also tried doing system updates and updating the airport utility - still nothing.

Psychoserenity wrote:
I also tried doing system updates and updating the airport utility - still nothing.
Repair permissions and restart your computer. Now try the following........
See KB Articles: http://support.apple.com/kb/HT1401 AirPort troubleshooting guide
http://support.apple.com/kb/HT2712 Using network locations in Mac OS X
============================
System Preferences>Network
Click the Assist Me button.
In the next window that pops up, click the Diagnostic button & do the necessary.
Also, run the Airport Utility app which is located inside the Utilities folder.

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Hi,
i am currently using 10.6.8 snow leopard
i usually access internet through my broadband modem and wifi at home.
i've been using our home wifi network for almost 1 week now (since it's new) and almost everyone at home use it as well.
and im using my broadband everytime i go out.
this last week, i went to a vacation and i use the wifi connection of the hotel where i stay in.
my connection works fine and so i don't use my broadband anymore.
then i got home..
when i got home.. i tried to connect to our home wifi network again .
like what im doing before, im clicking the airport icon on the top of my desktop,
and since my airport is always on, the next step that im doing is to click the preferred network that i want to join and put the password on it.
this is perfectly working in my macbook before i left.
but now , it's not working to my laptop anymore! i can't connect to it!
after putting the password and hitting the enter, the airport icon at the top will run, however after seconds it showing gray color with exclamation point on it!
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i tried checking my Network under system preferrence and the airport tab in the left corner is showing me a message that
my airport has the self-assigned IP address 169.***.****.** and will not be able to connect to internet!
i don't know what happen and i dont understand why is this happening since everyone at home can still use and access our home wifi !!
it's the same network that i'm trying to connect to anyway!
i tried using my broadband instead to connect online and it works fine!
but everytime i try to connect using wifi at home , again i cant connect!
anyone can tell me what's going on?
i haven't try joining other network anyway! but i'm planning to do so..
can some one help me please??
showing me a message that
my airport has the self-assigned IP address 169.***.****.** and will not be able to connect to internet!

and now, when i tried to check again my network preference below the airport tab is showing a message that
"my airport does not have an IP address and cannot connect to the internet!"
then after seconds it will goes back to the first message that
"airport has the self assigned IP address etc....."
i don't know whats going on now!
airport tab is not showing green color anyway! i'ts always in yellow!
i tried turning it on and off but nothing happen! HEEELLLLPP!!!!

Airport has a self assigned IP and can't connect to the internet

Thats what i get when i want to share an internet connection from my mini, macbook and macbook pro.
none of them give an internet signal out to the world, they used to, but i think the last software update changed things.
so, being that i have the same problem with 3 machines i can say for sure its not a hardware problem, tried manually assigning an ip address, changing the network channel to any of the options.
still im giving no internet to any device. Running snow leopard 10.6.5 on c2d intel machines.
please, help me, as im getting heavy complaints from other people who havent got internet access for days thanks to this.
thanks
ps: i have no router. i just have one mac connected via ethernet to the internet, and i want that machine to share internet via airport / wifi to other devices such as a macbook or an ipod touch
this worked wonders for a while, then stopped working, then worked again, then stopped. it seems it comes and goes as macOSX updates come and go.

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Well, what else is connected to your airport? Look at the network name it is using.

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Sorry to hear that you are having an issue with connecting the printer to your Mac over a wireless connection.
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Please feel free to write me back and I will be happy to assist you further with any questions or concerns you may have.
Thanks for your time.
Cheers,
Click the “Kudos Thumbs Up" at the bottom of this post to say “Thanks” for helping!
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
W a t e r b o y 71
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Man oh man... this issue has been festering for almost an entire year now and I have not found a solution. Last August (2009) my macbook stopped wirelessly connecting to my ATT 2WIRE dsl modem saying it had a self assigned ip address. I bought the computer in July and could connect with no issues for about a month. Ever since then, I've been connected via ethernet with slow connection. At the same time, the 2 iPhones in our household also could not connect wirelessly. One G5 could connect wirelessly but was extremely weak and often dropped the signal.
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Please someone help me! I promise some kind of reward if you can help me fix this.

Based on the model number, your Linksys router is OLD.
I'd actually suspect that your router has been the problem.
You can download the full user manual here --> http://homedownloads.cisco.com/downloads/wrt51ab_ug.pdf
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If it your Linksys wireless router is not password secured, it's possible that someone else changed settings about the time things stopped connecting.
Regardless, you can completely reset the Linksys to the factory defaults by holding down the Reset button on the Linksys for more than 10 seconds.
Do that first.
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On your Mac, in System Preferences, Internet and Network, Network,
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Move the selection back to Ethernet, and watch the Status.
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Now IF the Wired configuration works, lets move on to the wireless configuration...
(If the Wired configuration is still not working, post back and we'll work through it.)
Still in System Preferences, Internet and Network, Network, with the _test location you just created...
Select the AirPort interface in the left column.
Turn AirPort On.
If no Network Name appears, click on the up/down button and select Join Other Network and select your Linksys router name.
Click 'Apply'.
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My airport says self-assigned ip and won't connect to the wireless internet.

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