Recognize Network, but Cannot Connect

We recently changed the network name at my house. My ibook g4 still recognizes the network, but when I click on it to connect, it will not connect. It gives me a message box saying I can try again, but that does not seem to work. Any suggestions? Thanks.

Are you using the right encryption for the network?
Try repairing permissions and it'd be a good idea to update your OS to 10.4.11.
(You can ethernet in to do that.)
Also reboot everything, router, modem and computers and see if that works.

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Bob

Welcome to the Apple Community.
Intermittent problems are often a result of interference. Interference can be caused by other networks in the neighbourhood or from household electrical items.
You can download and install iStumbler (NetStumbler for windows users) to help you see which channels are used by neighbouring networks so that you can avoid them, but iStumbler will not see household items.
Refer to your router manual for instructions on changing your wifi channel or adjusting your multicast rate.
There are other types of problems that can affect networks, but this is by far the most common, hence worth mentioning first. Networks that have inherent issues can be seen to work differently with different versions of the same software. You might also try moving the Apple TV away from other electrical equipment.

Apple TV connects to the network but cannot connect to the internet.

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This might help:
Apple TV (2nd gen.) saw my wireless network but did not accept my password (gave a network error message). It fixed instantly doing this:
Made a note of the Apple TV's MAC address. Get it by pressing Menu on the remote, then Settings > General > About. It's called "WiFi address."
Use your browser on a network connected computer to go to your router settings (usually 192.168.1.1).
Under "Wireless > Wireless MAC Filter" (or something similar) do these steps:
Enable Wireless MAC filter
Enable "Permit PCs listed below to access the wireless network"
Enter the Apple TV's MAC address
Click "Save Setting"
When I did this the network connection immediately started working.
Note: These instructions are based on a Cisco Wireless-N Broadband, model WRT160Nv2, firmware v2.0.02.

IPhone can join WRT54GS network, but cannot connect to internet

I've got a WRT54GS v.1.1 router w/latest firmware (4.41.4). My wired and wireless computers (windows XP) can connect just fine and see the internet. My iPhone 3GS can join the network, but cannot see the internet. The phone can join the network, gets a DHCP address/gateway/DNS info just fine. Other machines on the local network can see the phone and vice-versa. However, any time the iPhone tries to reach out to the internet, a message pops up saying "Safari cannot open the page because it is not connected to the internet".
Again, other machines on my network can connect without issue. My iPhone has no trouble connecting to other WiFi networks.
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Thanks for your response!
IP: 192.168.1.100 (DHCP-assigned)
Subnet: 255.255.255.0
Gateway: 192.168.1.1
DNS: 66.218.44.5, 66.218.44.90 (the DNS's of my ISP)
Router's (local) IP address is 192.168.1.1
Router's internet-facing address is the one assigned by my ISP via their DHCP
All looks right to me.
-David

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I've had this problem once before and fixed it by reinstalling Windows XP and all my other software. I have no idea why it has happened again. I'm hoping for a less drastic solution to the problem..?

Hi Nakia,
> I cannot connect to the internet using Internet Explorer.
Have you tested other browsers like Mozilla Firefox and does this work?
As MasterG wrote try to renew the IP address using the commend line.
Last week I had a similar problem and I could solve it by updating the WLAN driver. Just remove the driver, restart the notebook and install the newest one. :)

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Wow, I tried to submit this as a problem and the computer lost the wifi connection again, so i lost the whole explanation i typed up.
I've turned off computer and modem multiple times.
When I tried to run the network diagnostic, the macbook pro gave me a "perhaps you are out of range error". I am sitting next to the modem.
My iphone and ipad are wonderfully connected to the home wifi network, so it cannot be the modem/router, correct?
If I am on the same floor as the router/modem then the macbook pro can see my home network but after tyoing in my password and trying to connect i get a "timed out" message.
If I move down one floor, then the macbook can see and connect to the wifi. I only have one modem on one floor.
Is there some sort of diagnostic I can run to see why this particular device (macbook pro) is behaving ths way? It just seems weird because the computer could connect to the wifi network yesterday while i was sitting next to the router.

SOLUTION!
I've been suffering from this problem for a few months. I tried everything suggested by everyone, and then, today, I had a mad idea.
I used to work in a room in the house that's about 12 metres away from the router. It's on the next storey up and horizontally about 8 metres away. The problem started when I began to work in the same room as the router.
Today I became so frustrated that for some reason I walked into a room about 8 metres away on the same level - Guess what? I connected with no problem at all. Feeling full of joy I walked back to the room where the router is located - Dropped internet connection within a few minutes! Walked back to the the room that's 8 metres away and, hey presto! I have a connection. I now realise that the problem was that I moved too close to the router.
I can think of no logical explanation for my experience, but empirically it seems to work. Does anyone have the faintest idea of why this should be the case? In the absence of an answer I think I may have to start believing in fairies at the bottom of the garden - I'm just off to set a meal for them.
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Hi,
Open your browser and type in the ip adress of your printer. This will bring you to an internal page of the aio. On the networking tab you shouild be able to set your dns.
Say "Thanks" by clicking the Kudos Star in the post that helped you.
Although I work for HP my posts and replies are my own
Please mark the post that solves your problem as "Accepted Solution"

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Here is a url that goes to a great HP printer diagnostics utilities page. You should be able to find a network connection utility on the page that helps you solve your connection issue.
Best regards,
erico
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

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It's not uncommon for you to "see" a great many networks, dozens even, yet you not be able to connect to any of them even if they are "open" (no lock icon). There may be a number of reasons for that, such as they're too weak for a reliable connection, or the router may limit connections to only specified devices.
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Recognize Network, but Cannot Connect

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