Macbook pro airport disconnected

Hai,
I used to connect my macbook pro 2009 with Iphone 4 personal hot spot. Recently i noticed that it always disconnected automatically. Whenever i tried
To reconnect it, it always shown that the connection is "time out".
Then i turned off the airport, but i find it difficult to turn on the airport again so i have to restart it.
I did test with Apple Hard ware test, but nothing is detected on the hard ware.
Could anyone help me, please???

The same thing happened here. I even looked up my password in the Keychain app to make sure I've got the right one, still didn't work. The Airport Utility wants me to update my firmware from 7.4.2 to 7.5.2 but I can't do that without the password.
I found information on resetting the password, you might find this useful too.
http://support.apple.com/kb/ht3728
I'm already not wanting to do this because it'll mean updating all the iphones and computers that use the wireless network. for some reason the current password is fine, it just doesn't work in the AirPort Utility
Dave

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You could try deleting the airpot from the sidebar of system preferences/network. To do this,
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Hi I have a link for troubleshooting yosemite wifi problems. I don' t know if this helps with Iphone .I don't use Iphone so I'm no good on that.http://osxdaily.com/2014/10/25/fix-wi-fi-problems-os-x-yosemite/

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You should first update the Airport firmware for it, simply run the Airport and Software update.
See this
http://support.apple.com/kb/TS3802
And then go to your System Preferences > Network > Advanced > TCP/IP and for IPv6 turn : OFF
Reboot and see how that goes.
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http://support.apple.com/kb/HT1379
http://support.apple.com/kb/ht3964
Go to your <home> /Library/Preferences and drag the
com.apple.systempreferences.plist
file to the desktop and reboot, it will be rebuilt, hit your Sytem Preferences and reset them.
drag the useless file on the desktop to the trash.

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Message was edited by: Vinnie Parlatore

Welcome to the Discussions!
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Hello, amal111.
Thank you for visiting Apple Support Communities.
Here is an article that I would recommend going through when experiencing Wi-Fi connectivity issues. Also, make sure all firmware updates have been processed on the router and the settings have been adjusted to the recommended settings in the second article below.
Wi-Fi: How to troubleshoot Wi-Fi connectivity
http://support.apple.com/kb/HT4628
iOS and OS X: Recommended settings for Wi-Fi routers and access points
http://support.apple.com/kb/HT4199
Cheers,
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Macbook pro airport disconnected

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