My iMac g5 won't connect to a wireless network

I just got a new hard drive- and now I can't connect to our wireless network- all our other items are connecting so its not the router- thoughts?

Hi, this has worked for a few...
Though all of these steps may or may not be needed, I'm including them all.
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
10.7 & 10.8…
System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
10.5.x/10.6.x/10.7.x instructions...
System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
The interface that connects to the Internet should be dragged to the top of the list.
10.4 instructions...
Is that Interface dragged to the top of Network>Show:>Network Port Configurations.
If using Wifi/Airport...
Instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.
For 10.5/10.6/10.7/10.8, System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
208.67.222.222
208.67.220.220
(There may be better or faster DNS numbers in your area, but these should be a good test).
Click OK.

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Click the “Kudos Thumbs Up" at the bottom of this post to say “Thanks” for helping!
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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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Thanks for your time.
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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
I work on behalf of HP

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Hi HugBeth - Welcome to the forums.
Notice the links other posters provided above? Follow those links and then come back and thank those folks that took the time to pass along problem-solving advice.
Pam, you might wish to checkout these resources as well:
I prefer this list of solution oriented suggestions as a starting point: http://tinyurl.com/3yorao9
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Hello Jwine2011
It could possibly be the AirPort card giving you troubles. To troubleshoot the issue of not being able to connect to Wi-Fi or wired network connection, start with creating a new network location. Check out the first article to go over that. If you are still having issues, then check out the second article with troubleshooting issues connecting to Wi-Fi.
Using network locations in OS X v10.5 or earlier
http://support.apple.com/kb/HT2712
Wi-Fi: How to troubleshoot Wi-Fi connectivity
http://support.apple.com/kb/HT4628
Regards,
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My iMac g5 won't connect to a wireless network

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