Can't connect to network/internet

Hi,
I'm running on a G4 Dual 1.25GHz with 1GB RAM. OS 10.3.9
Something really weird happen to my mac, my G4 freeze on me with a grey screen asking me to restart. Then I notice when I unplug my network cable, the system is working fine., when I plug it in it will freeze with grey screen. After switching-off all the added fonts, scan and fixed in Disk Warrior, repair all permissions in Disk Utility, reset the PRAM, end up still the same.
I wanted to reinstall the system but I only have OS 10.3 installer which i can't overwrite on a updated HDD.
Really scratch my head on what could go wrong, network port failure? Please help.
Message was edited by: fredlimck

You can reinstall Panther by the following procedure:
How to Perform an Archive and Install
An Archive and Install will NOT erase your hard drive, but you must have sufficient free space for a second OS X installation which could be from 3-9 GBs depending upon the version of OS X and selected installation options. The free space requirement is over and above normal free space requirements which should be at least 6-10 GBs. Read all the linked references carefully before proceeding.
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported, then quit DU and return to the installer.
2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update.

Similar Messages

Can connect to my house network, but can't connect to the Internet (other computers can)

Hello,
I'm experiencing a strange problem. Since I started my Mac Pro (cold start) some hours ago, I've lost the hability to connect to the Internet (Safari and Mail say I'm not connected). However, I can connect to 192.168.2.1 (my router) and see its webpage (it says it's connected to the Internet). If I use another computer on the same network, it can also connect to the Internet.
Weirder, if I go back to my Mac Pro with "no internet" and launch Parallels Desktop, then I can use WinXP to browse the Internet; I'm writing this post on my WinXP virtual machine.
This leads me to think there's a problem with how my Mac OS handles the networking. I have checked the Console, but the only related string I found is this:
16.04.13 22:03:25
kernel
SIOCPROTOATTACH_IN6: en2 error=17
As expected, Google doesn't reveal anything about that (and I'm connected with the first ethernet port). I've tried to restart my Mac, but the problem persists (exact same symptoms).
Could it be a DNS cache issue?
I don't see, other than a DNS problem, why I can't connect to the Internet with my Mac OS while I can on my virtual machines. If it was a driver problem, I wouldn't be able to connect to my router. If it's a DNS issue, where are the DNS caches located in order to clear them (I'd trash the folder)?
I could also reinstall the OS (waste of time, btw), but I'd really like to understand the problem, not just clear it and forget about it.
Or better than guesses, anyone already experienced this?
Any help welcome.

If it's a DNS issue, where are the DNS caches located in order to clear them (I'd trash the folder)
No DNS caches, it looks up the alphabetic and then uses the numberic from then on.
http://17.149.160.49
is Apple, Inc main US web site. It that works, and the alphabetic does not, you have a DNS probelm.

After update I can't connect to the internet in no way, shape or form

I rarely update because: 1) something always breaks when you update (like now) and 2) I don't like to deal with new crap like GNOME 3. Anyway:
I bought a new router (TL-WR1043N) and configured it with an old Ubuntu because connecting to 192.168.1.1 didn't work on any of my Arch Linux installations. Now... here's where it all starts... I can't use the 'n' wireless on my laptop since I have to install something to use WPA, and to install that I need to update, but I don't want to deal with GNOME 3 and Firefox >3. But I gave up eventually gave up and connected my laptop to the router by Ethernet cable. Setting that up was very easy: 'ifconfig eth0 up; dhcpcd'. Voila! I updated my whole system and restarted. To see how badly I damaged my system I opened Nautilus (I use Openbox with some GNOME programs): shock and dismay, the fonts are visible from the moon. I guess I'll have to quit using GNOME programs completely now but I expected that. I used to use KDE back in the day and when KDE4 came forth from that unholy pit, I immediately abandoned it for GNOME. This time we had more time to prepare, everybody knew what GNOME 3 was going to be. I started using Openbox quite a long time ago.
Anyway: Now to fix my wireless right? WRONG! I can't connect to the internet on cable to get the packages for wireless. I installed Windows 7 64 on the same laptop and it connects to the cable. Ubuntu 9.10 Live also connects, but due to the changes of rc.conf and network stuff I can't connect at all with Arch Linux.
So I decided to abandon it completely and reinstall from scratch. But the Live CD also doesn't work. With all the ways I've tried it all comes down to this:
dhcpcd always times out waiting for a carrier and 'ip addr' shows 'eth0: <NO-CARRIER, ....' if the interface is up. I'm not sure what information I should give you, but I can't paste any here since I can't connect to the damn internet on that laptop.
About the router: the cable is plugged on port 1 and the LED for it flashes if I reboot the computer. In Windows it stops flashing while it connects and flashes again when connected. I removed 'network' from DAEMONS and it flashes till I start it with '/etc/rc.d/network start'. This hangs for a while and returns '[DONE]' even though it doesn't work and the LED never flashes again on the router.
In rc.conf I have exactly what the example says for DHCP. In any case, it doesn't work with the Live CD either.
EDIT 1: From lscpi: painstakingly typed:
06:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61)
07:00.0 Ethernet controller: Realtek Semiconducctor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01)
EDIT 2: Just to be clear: I can use the wireless on the laptop on the Live CD, but I want to use the cable because of the greater speed (94Mbit/s on cable 60 something on wireless n, 20 something on g) and because I rarely move the laptop.
EDIT 3: lspci -v shows "Kernel driver in use: r8169 / Kernel modules: r8169", so the driver is loaded.
EDIT 4: So if I boot from the CD. ip addr shows:
eth: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
link/ether 00:1d:92:...etc... brd ff:ff:ff:ff:ff:ff
And the LED flashes. When I type: "ifconfig eth0 up" it stops, never to light up again and ip addr shows: "eth: <nO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
Last edited by imtired (2011-09-08 12:36:51)

When you're in Arch, use output redirection
lspci >lspci.out
then boot into Ubuntu or something where you can access the files and the BBS, Of course, don't forget to use a new file for each command output.
The new network config in rc.conf is not that complicated (wired anyway; never used wireless). OTOH I've had issues on two machines where I have to restart the network daemon (rc.d restart network) or rerun netcfg (netcfg eth0) after boot to get connectivity. And I still haven't come to grips with the ip command.

Can't connect to the internet

Ok. so i did a search and didn't come across any other problems like the one I'm having.
Let me start off by stating that my laptop is an ibook g4 bought feb, '06 (yes the apple care just ran out).
I'm having a problem connecting to the internet on my ibook, running through a d-link wireless router. I'm using my imac to connect to the internet currently (which works fine by the way). It also is connected through the wireless router.
My ibook has a strange ailment. I open up Safari and all I get is a blank screen, the page is trying to load but the status bar is going no where and does the same in Firefox. So first, I opened Network diagnostics, but the computer freezes and I have to do a hard shutdown. (holding the power button). Next, I tried Disk utility. Verified Permissions, Repaired Permissions, everything is fine. I tried to Verify Disk, and again the computer freezes, will not let me force quit and I am forced to do another hard shutdown. I do the thing where you hold down some key while you're starting up to get into the disk utility so I can repair the disk. This returns clean as well. I downloaded techtool off of my Applecare disk. Did the tests, everything passes. So what's the deal?? I've tried to reset the pram. I even did the Apple Hardware test, everything passed.
I thought it could be my Airport card? It recognizes that there is an internet connection in the top right corner, I even have great signal strength (mostly because I've tried this sitting right next to the router). But still, I can't connect to the internet. Any one have any ideas? I don't know what else to try! Please help!

so i can't believe i didn't try to connect it directly to the router with the ethernet cord. This actually worked. But it still didn't solve my wireless problem. I'm not willing to let my laptop become a desktop. I'm already wired to a plug b/c the battery is slowly dying and has a life of about 5 minutes. I'm not willing to give up my wireless internet too.
I guess now it's got to be the airport card? how do I confirm this? and if it is how much would a new one cost and can I install it myself??

Can't connect imac to internet through Airport Express

Hello
I am trying to connect my new imac (2.4Ghz,OS X 10.5) to the internet through my Airport Express (v6.3) but have encountered some problems.
The set up goes like this:
Cable Internet <wired> TP-LINK Router <wired> AE <wireless> imac
The internet is coming from my landlord on the bottom floor of my apartment so I can't change the router.
The router is assigning a static IP to my AE (192.168.5.101).
I am using WEP 128 bit security.
I have set the AE through Airport Utility to act as a Bridge.
On the imac I set the Network preferences to manually select an IP address (192.168.5.110) which is out of the range of the Router (192.168.5.101-108).
The AE connects and lights up green and the imac recognises the AE but I still cannot access the internet...
I have also tried to wirelessly connect my PC laptop to the AE using other static addresses but I still can't connect to the internet.
Can anyone please help??
Regards
Starwolfgang

Hello Starwolfgang. Welcome to the Apple Discussions!
The router is assigning a static IP to my AE (192.168.5.101).
Are you sure that this provided IP address is static? If so, you also need to note the provided DNS server(s) IPs as well.
On the imac I set the Network preferences to manually select an IP address (192.168.5.110) which is out of the range of the Router (192.168.5.101-108).
Since you configured your AX in bridge mode, your computer will be dependent on the NAT (& possibly DHCP) services provided by your apartment's router. Assuming that your landlord doesn't filter out any IP addresses and that the IP address you set is valid, you need to compare your iMac AirPort's DNS server address settings with that provided by your apartment's router to be sure they match.
Finally, assuming that your apartment provides you with an Ethernet jack, if you connect your iMac directly (via Ethernet) can it access the Internet?

Can't connect to the internet with Airport OR ethernet cable

I know many other people are having problems with airport not being able to connect to the internet. I've never had any problems with my mac before, but 2 days ago, it started to act really funny. When i turned it on, my time and date were changed to Jan. 1, 2000, and I kept on getting notifications about configd and mdnsresponder wanting to connect to the internet. I did a little research and fixed that problem. Then, a few days ago, my internet was dropped from my computer completely, and I've never been able to connect via airport since.
The main problem is that even when I plug the ethernet cable into my mac, I can't connect to the internet either. It worked a few days ago, but now my computer can't even connect. It registers that the cable is in the computer, but thats' about it. The Network Diagnostics assistant tells me to restart themodem, and that hasn't been helping at all. Any helpwould be appreciated.

First Reset your Pram to see if resets you clock (the different Date caused the problems. Plus open System Preferences->Date & Time pane. In there make sure you set the current date/time and se if you can have the Mac automatically update the time from a Time Server.

Can't connect to the internet with airport or firewire

I can't seem to connect to the internet with airport or firewire. I recently restored my old G4 mac mini PPC 1.42 (with airport and bluetooth) Tiger 10.4.8 with a new harddrive. I have it connected to my leopard mac pro, internet sharing is on (both computers), the systems are connected, however, the mini just can't connect to the internet. tried it also using airport, no go. network diagnosis seems to go in a constant loop.

works ok with ethernet connection though.
that'll work.

Can't connect to the internet in my home yet other devices can. I tried it in other Wifi places and it connects without a problem. My home Wifi is with Att uverse

Can't connect to the internet in my home yet other devices can. I tried it in other wifi places and it connects without a problem. My home wifi is with ATT Uverse. I cheched the IP address on my laptop and its different than on my Ipod although it on the same network.

Move off WEP to WPA or, preferably, to WPA2 (as recommended by Apple). WEP has been deprecated by the WiFi Alliance since 2004 as insecure (it can be cracked in seconds by any hacker).
Note that each device on a network has a unique IP address but if your address starts with 169 then you did not get a valid IP address assigned to you by your router. If restarting the router did not cure the problem then you should check for a firmware update for your router.

I put the BT WiFi app on my iPad Mini and now I can't connect to the internet. Please help

I put the Bt WiFi app on my iPad Mini and now I can't connect to the internet. Please Help

Some things to try first:
1. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
2. Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
3. Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
4. Go into your router security settings and change from WEP to WPA with AES.
5. Renew IP Address: (especially if you are droping internet connection)
    •    Launch Settings app
    •    Tap on Wi-Fi
    •    Tap on the blue arrow of the Wi-Fi network that you connect to from the list
    •    In the window that opens, tap on the Renew Lease button
6. Potential Quick Fixes When Your iPad Won’t Connect to Your Wifi Network
http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
~~~~~~~~~~~~~~~~~~~~~~~~~
Fix WiFi Issue for iOS 7
http://ipadnerds.com/fix-wifi-issue-ios-7/
iOS 6 Wifi Problems/Fixes
Wi-Fi Fix for iOS 6
https://discussions.apple.com/thread/4823738?tstart=240
How To: Workaround iPad Wi-Fi Issues
http://www.theipadfan.com/workaround-ipad-wifi-issues/
Another Fix For iOS 6 WiFi Problems
http://tabletcrunch.com/2012/10/27/fix-ios-6-wifi-problems-ssid/
Wifi Doesn't Connect After Waking From Sleep - Sometimes increasing screen brightness prevents the failure to reconnect after waking from sleep. According to Apple, “If brightness is at lowest level, increase it by moving the slider to the right and set auto brightness to off.”
Fix For iOS 6 WiFi Problems?
http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
Did iOS 6 Screw Your Wi-Fi? Here’s How to Fix It
http://gizmodo.com/5944761/does-ios-6-have-a-wi+fi-bug
How To Fix Wi-Fi Connectivity Issue After Upgrading To iOS 6
http://www.iphonehacks.com/2012/09/fix-wi-fi-connectivity-issue-after-upgrading- to-ios-6.html
iOS 6 iPad 3 wi-fi "connection fix" for netgear router
http://www.youtube.com/watch?v=XsWS4ha-dn0
Apple's iOS 6 Wi-Fi problems
http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
~~~~~~~~~~~~~~~~~~~~~~~
How to Boost Your Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Boost-Your-Wi-Fi-Signal.h tm
Troubleshooting a Weak Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/Troubleshooting-A-Weak-Wi-Fi-Sig nal.htm
How to Fix a Poor Wi-Fi Signal on Your iPad
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-A-Poor-Wi-Fi-Signal-O n-Your-iPad.htm
iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
How to Fix: My iPad Won't Connect to WiFi
http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
iOS: Connecting to the Internet http://support.apple.com/kb/HT1695
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Connect iPad to Wi-Fi (with troubleshooting info)
http://thehowto.wikidot.com/wifi-connect-ipad
10 Ways to Boost Your Wireless Signal
http://www.pcmag.com/article2/0,2817,2372811,00.asp
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
Some Wi-Fi losses may stem from a problematic interaction between Wi-Fi and cellular data connections. Numerous users have found that turning off Cellular Data in Settings gets their Wi-Fi working again.
You may have many apps open which can possibly cause the slowdown and possibly the loss of wifi. In iOS 4-6 double tap your Home button & at the bottom of the screen you will see the icons of all open apps. Close those you are not using by pressing on an icon until all icons wiggle - then tap the minus sign. For iOS 7 users, there’s an easy way to see which apps are open in order to close them. By double-tapping the home button on your iPhone or iPad, the new multitasking feature in iOS 7 shows full page previews of all your open apps. Simply scroll horizontally to see all your apps, and close the apps with a simple flick towards the top of the screen.
Wi-Fi or Bluetooth settings grayed out or dim
http://support.apple.com/kb/TS1559
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

Can I connect to the internet with an Ipad in Santo Domingo, DR while I'm on vacation?

Can I connect to the internet with an Ipad in Santo Domingo, DR while I'm on vacation?

Lots of hotels in the DR have WiFi. And there is plenty of cellular coverage in Santo Domingo (and elsewhere).
One thing to be careful of, the WiFi networks are usually not secured and are very vulnerable to people "listening" for passwords and user names, so don't do any financial transactions online and perhaps consider setting up some temporary passwords for the trip and changing them when you get home.
-dan

Some of my Mac apps can´t connect to the internet, while Firefox can

All of a sudden, Safari, ITunes, Software Update, can´t connect to the internet. It happens in my office and in my house. Have not checked other networks. Firefox wors fine, as does Mail (for now). What can be the problem?

Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
Step 1
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins and log in as Guest. For instructions, launch the System Preferences application, select Help from the menu bar, and enter “Set up a guest account” (without the quotes) in the search box.
While logged in as Guest, you won’t have access to any of your personal files or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
As Guest, test. Same problem(s)?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
Step 2
The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. The instructions provided by Apple are as follows:
Be sure your Mac is shut down.
Press the power button.
Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on some Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem(s)?
After testing, reboot as usual (i.e., not in safe mode.) Post the results of steps 1 and 2.

I have CS 6 installed on a Win 7 OS machine. I can not connect to the internet to get updates from within the program. How do I fix this?

I have CS 6 installed on a Win 7 OS machine. I can not connect to the internet to get updates from within the program. How do I fix this?

IP routing doesn't work the way many folks might initially think it does; functional IP routing requires manual configuration and the establishment of static routes and default routes specific to the local network configurations, and it's very easy to get it wrong, or to get the default route swapped. Multiple NIC boxes don't magically work, either. (Been there, done that, wondered what happened to my network when the paths got reordered or my route settings were messed up, etc.)
Routing configuration errors can be quite subtle, too. (Again, voice of experience. Ever had a thousand-seat office LAN accidentally routing through your desktop? As the, um, unnamed guilty party discovered, getting into that configuration was subtle. Seeing the performance crater on the fellow's box and on the LAN was obvious.)
Knowing how IP routing works is a prerequisite to getting this configuration to work; there's manual configuration required. Clearly something has gone weird here.
What to do? Read up on IP routing. I'll again suggest the threads and the manual mentioned earlier.
And in general, I prefer to avoid using my comparatively expensive Mac boxes as sub-optimal IP routers or as firewall boxes. General-purpose operating systems and generic x86 boxes are going to be inherently poor IP routers. Dedicated routers (or embedded or surplus x86 boxes with routing software loaded) offload the Mac boxes here, and are also typically easier to configure manage. And "real" IP routers can have hardware specific to efficiently routing packets. Use of an outboard firewall or firewall-router box also greatly simplifies gateway routing, too; it's a configuration that many folks and many businesses tend to use.

Powerbook G4 (OS 10.4.11) cannot connect to network/internet

Powerbook G4 (OS 10.4.11) cannot connect to network/internet via wireless. It had been working very well before I changed my rounter to Linksys E4200.
I had consulted Linksys on this issue and they said to check with the "MANUFACTURER"!!! Can anyone help?
My other Mac works fine with the new router.

This link may help. https://kb.wisc.edu/helpdesk/page.php?id=6443
 Cheers, Tom

I can not connect to the internet while using my ipad I get a message saying Safari could not open the page because the server stopped responding need help thank you

I CAN NOT CONNECT TO THE INTERNET WHILE USING MY IPAD I KEEP GETTING A MESSAGE SAYING SAFARI COULD NOT OPEN THE PAGE BECAUSE THE SERVER STOPPED RESPONDING PLEASE HELP THANK YOU

Try the following:
1. Turn router off for 30 seconds and on again
2. Settings>General>Reset>Reset Network Settings
3. Reset iPad; hold the Sleep and Home button down until you see the Apple Logo

Why is my wi-fi signal is going strong, but I can't connect to the internet?

Before I begin, here's my set-up:
My wi-fi signal (on the top right side of my MacBook) is going strong (with all the bars). And a green light is lit up on my Airport Extreme. For some reason, I still can't connect to the internet/use Apple Mail/use iChat. I don't think that there's anything wrong with my MacBook, as my wife isn't able to connect to the internet with her iPad or with her laptop either.
I'm thinking that I have the strong wi-fi signal showing up on my computer because it actually is connecting to the Airport Extreme, yet the airport extreme somehow isn't connected to or isn't able to connect to the router. Would this be correct? Any ideas of how I might fix this? I tried unplugging and replugging everything for a few seconds. However, whenever I use a hardwire ethernet connection to my MacBook, my internet and everything works.
ALSO, of note, I just purchased an Apple Time Capsule. I just realized that it functions as a wi-fi base. Any chance that my computer, my wife's iPad and laptop are just connecting to the Time Capsule instead of the Airport Extreme?
Any answers would be more than appreciated. Thanks!

Deselect Proxies if selected.
Safari > Preferences > Advanced > Proxies:
Click "Change Settings" button
The network preferences window for Proxies will will show up with "Proxies"
tab selected.
Under "Select Protocol", uncheck any box if selected.
Click "OK", then "Apply"

Can't connect to network/internet

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