Imac suddenly stopped connecting to network

sorry if this topic already exists somewhere. i've been searching these forums for an hour and can't find any useful help on the subject.
we bought our first mac almost 1.5 yrs ago. this beautiful 27" imac worked fine for 1 year and then suddenly stopped connecting to our wireless network. distance to the wireless router isn't an issue. doesn't matter where i move it to in the house, it sees the network, but won't connect anymore. 6 other laptops/video game consoles/pc's all continue to connect w/o a problem. this happened once approx 3 months ago and i figured our old router had kicked the bucket, so i bought a new router and it worked fine for several months and now it's happening again.
i've gone thru all the preliminary steps of unplugging the modem, the router, the imac, and renewing the dhcp but nothing helps. it will work fine if i wire it directly to the router, but i don't want to run a 75ft ethernet cable thru the house.
i'm so frustrated with this supposedly wonderful imac! can anyone help me?

Here's something to think about... I know my AT&T DSL Cable Modem will only allow a certain number of connections. A few years ago that might not have been an issue, but now with wi-fi cells, gaming systems with netflix, other laptops/ipads, you might be exceeding that limit. It could be they are all connected and you don't have a spot on the router.
This might be elementary, but thought I'd throw that out there.
BW

Similar Messages

IMac suddenly stopped connecting to my wireless network

Hi there,
I've had my iMac for about 2 years and had no problems up to now.
About two days ago my wireless network disconnected and kept disconnecting and connecting on and off, it's not the Internet because my iPod and pc are fine.
I was just wondering what could of caused this, a virus? Dodgy update install? Also how I can fix this? If I reinstall my os will it wipe my files, I'm a filmmaker so I need to keep pretty much everything on my computer
Thank youuu!

Hi there, I have exactly the same problem, one year with imac and a few months ago my wireless network disconnected and kept disconnecting and connecting on and off, it's not the Internet because laptop and other aps are ok
Today I tried contacting Virginmedia to see if they could help and they told they are not trained for mac! Anyway they suggested to try to use the "renew DHCP lease" button in the TCP/IP page in network settings and it seems it is working better now, lets see if it lasts...

IMac suddenly stopped connecting to the internet

So, I left the room for a while and let the screen saver come up, when I came back it wouldn't connect to the internet with any program (iChat, Safari, Firefox, and Thunderbird).
I connect via ethernet to FiOS but none of the other computers are having trouble connecting.
It's not a connection problem, thankfully. I connected my ethernet cable to a laptop and it connected perfectly.
I ran a diagnostics, however it was essentially useless. It told me that it could not connect to the internet or the server, and to check to make sure that the URL was typed correctly... No websites will load, though.
I did ping my mother's laptop (and my own computer) and it came back fine again, again and again...
In my limited opinion, it has to be some sort of software problem, but this being so all of a sudden bothers me. If I were on a PC I would think virus, but since it's a Mac, this is not likely at all.
Please give me some help and ideas, cause I have run out...
Thanks,
Mike.

I used to have the exact same problem, after I cleared my dns cache and renewed my DHCP license everything worked. Strange thing is that, somehow, someway, by some form of magic this problem stopped happening all together so I never had to continue issuing the command everytime. Could've been due to an update shrug
Type the command below in a terminal. Then renew your DHCP license in Network settings
-> sudo dscacheutil -flushcache

My iMac suddenly stopped connecting to Apple TV

i tried to airplay from my iMac today to my apple tv and it did not work. i tried making changes to my firewall, powering down all devices and restarting and its still not connecting. help

Greetings cbtc160,
So you were using Airplay just fine but suddenly it quit?
I'm not sure what changes you made to your firewall, but please make sure the settings match those in this article.
About AirPlay Mirroring in OS X - Apple Support
Firewall security settings
If you use a firewall, make sure the following firewall security options have been set to allow AirPlay Mirroring to work:
Choose System Preferences from the Apple menu ().
Click Security & Privacy, then click Firewall.
Click the lock icon to unlock it if it's locked, then type an administrator name and password.
Click Firewall Options.
Deselect (uncheck) the “Block all incoming connections” checkbox.
Select (check) the “Automatically allow signed software to receive incoming connections” checkbox.
You may also want to check out the rest of the troubleshooting section as well.
Best,
Nubz

IMac suddenly stopped connecting to wifi

Nothing has been changed on either device, including their locations. My iPhone and iPad mini still have no problem connecting to my network. Help!

Thanks- I tried, but it still doesn't work. The iPhone and iPad connected immediately. Even when I click on my network, it still won't connect.

Iphone 4s wifi suddenly stopped connecting to home network

My iphone 4s suddenly stopped connecting to my home wifi 2 weeks ago, now it won't even bring it up on the list of available networks. I have tried resetting network settings, have tried manually connecting but it says "unable to locate network". Why would this all of a sudden start doing this when I have had this phone for over a year. My husbands iphone 4 has no problems whatsoever and connects to our home network just fine so I know it is not the router. This is so frustrating

I'm currently suffering from this problem as well. If you or your husband can get your iPhone open, there may be a screw in the upper antenna area of the iPhone that is loose (this screw grounds the antenna to the chip/mainboard).
http://www.iphoneshopusa.com/blog/wp-content/uploads/2012/04/top-shield-iphone4- wifi-problem1.png
It's pointed out in the image above. Many have tightened the screw and said their Wi-Fi optimally again. Having a phone for a year does mean a lot of wear-and-tear: dropping, vibration, heat, all accumulate so that the delicate components inside get knocked around and, in this case, loose. Try this method! (If you can, of course.)
Good luck!

IMAC suddenly stops working Mouse,keyboard, wifi all stops responding. PLEASE HELP

iMAC suddenly stops working,display is on but key board and mouse does not respond.I changed keyboard with usb also but still same.even wifi stops working also.PLEASE HELP before there was some kernel panic errors , i updated every thing, installed an original osx mountain Lion. taken to Apple service center. They found nothing wrong with hard ware. But i am having still the same problems. It just stops responding to keyboard, mouse even wifi goes off some time. I thought it may be keyboard mouse problem so i changed them to normal usb keyboard and mouse but still the same. PLEASE PLEAE HELP. -------- LAST ERROR REPORT IS BELOW Interval Since Last Panic Report: 687085 sec Panics Since Last Report: 2 Anonymous UUID: 48C67BCC-4ADB-0131-8FCC-DBD9C01FBB0C Fri Jul 19 17:23:01 2013 panic(cpu 0 caller 0xffffff80096b8655): Kernel trap at 0xffffff7f8a53f351, type 14=page fault, registers: CR0: 0x000000008001003b, CR2: 0x0000000000000060, CR3: 0x000000000bf36000, CR4: 0x0000000000000660 RAX: 0x0000000000000000, RBX: 0x0000000000000000, RCX: 0x0000000000000018, RDX: 0x0000000000000004 RSP: 0xffffff8089c4ba60, RBP: 0xffffff8089c4ba80, RSI: 0x0000000000000060, RDI: 0x00000000ffffff8f R8: 0x00000000000000ff, R9: 0x0000000000000019, R10: 0xffffff8074831004, R11: 0x0000000000000008 R12: 0x0000000000000000, R13: 0xffffff807482e0ec, R14: 0x00000000ffffffff, R15: 0x0000000000000000 RFL: 0x0000000000010297, RIP: 0xffffff7f8a53f351, CS: 0x0000000000000008, SS: 0x0000000000000010 Fault CR2: 0x0000000000000060, Error code: 0x0000000000000000, Fault CPU: 0x0 Backtrace (CPU 0), Frame : Return Address 0xffffff8089c4b700 : 0xffffff800961d626 0xffffff8089c4b770 : 0xffffff80096b8655 0xffffff8089c4b940 : 0xffffff80096ce17d 0xffffff8089c4b960 : 0xffffff7f8a53f351 0xffffff8089c4ba80 : 0xffffff7f8a525ff5 0xffffff8089c4bac0 : 0xffffff7f8a53a352 0xffffff8089c4bb50 : 0xffffff7f8a50da56 0xffffff8089c4bbb0 : 0xffffff7f8a4e5c36 0xffffff8089c4bbf0 : 0xffffff7f8a4e71b4 0xffffff8089c4bc20 : 0xffffff7f8a547d3c 0xffffff8089c4bc50 : 0xffffff7f8a4fad5b 0xffffff8089c4be00 : 0xffffff7f8a4f8a9e 0xffffff8089c4be40 : 0xffffff7f8a4fee0e 0xffffff8089c4be80 : 0xffffff7f8a5454df 0xffffff8089c4beb0 : 0xffffff7f8a58c82e 0xffffff8089c4bf00 : 0xffffff8009a4b1ab 0xffffff8089c4bf60 : 0xffffff800963e25e 0xffffff8089c4bfb0 : 0xffffff80096b3137 Kernel Extensions in backtrace: com.apple.driver.AirPort.Atheros40(600.72.2)[EBF8D6E8-59C6-3C1C-9549-32DDA193B1 D2]@0xffffff7f8a4ad000->0xffffff7f8a5f5fff dependency: com.apple.iokit.IOPCIFamily(2.7.3)[1D668879-BEF8-3C58-ABFE-FAC6B3E9A292]@0xffff ff7f89c83000 dependency: com.apple.iokit.IO80211Family(530.4)[E86BEE31-8EE0-34BE-A53F-2571D85CC628]@0xff ffff7f8a43e000 dependency: com.apple.iokit.IONetworkingFamily(3.0)[F02560D1-ADE6-3AD9-8D05-43CB2B7C8B87]@0 xffffff7f89ddc000 BSD process name corresponding to current thread: kernel_task Mac OS version: 12E55 Kernel version: Darwin Kernel Version 12.4.0: Wed May 1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64 Kernel UUID: 896CB1E3-AB79-3DF1-B595-549DFFDF3D36 Kernel slide: 0x0000000009400000 Kernel text base: 0xffffff8009600000 System model name: iMac10,1 (Mac-F2268DC8) System uptime in nanoseconds: 397672779228 last loaded kext at 256566570174: com.apple.filesystems.msdosfs 1.8.1 (addr 0xffffff7f8b624000, size 65536) last unloaded kext at 363393284081: com.apple.filesystems.msdosfs 1.8.1 (addr 0xffffff7f8b624000, size 57344) loaded kexts: com.apple.filesystems.smbfs 1.8.4 com.apple.driver.AudioAUUC 1.60 com.apple.driver.AppleHDA 2.3.7fc4 com.apple.driver.AppleMikeyHIDDriver 122 com.apple.driver.AGPM 100.12.87 com.apple.driver.AppleHWSensor 1.9.5d0 com.apple.driver.AppleUpstreamUserClient 3.5.10 com.apple.kext.AMDFramebuffer 8.1.2 com.apple.driver.AppleMikeyDriver 2.3.7fc4 com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0 com.apple.driver.AppleLPC 1.6.0 com.apple.driver.AppleBacklight 170.2.5 com.apple.driver.AppleMCCSControl 1.1.11 com.apple.ATIRadeonX2000 8.1.2 com.apple.iokit.IOUserEthernet 1.0.0d1 com.apple.iokit.IOBluetoothSerialManager 4.1.4f2 com.apple.Dont_Steal_Mac_OS_X 7.0.0 com.apple.driver.ApplePolicyControl 3.4.5 com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport 4.1.4f2 com.apple.filesystems.autofs 3.0 com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1 com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1 com.apple.BootCache 34 com.apple.driver.AppleIRController 320.15 com.apple.iokit.SCSITaskUserClient 3.5.5 com.apple.driver.AppleUSBCardReader 3.1.7 com.apple.driver.XsanFilter 404 com.apple.iokit.IOAHCIBlockStorage 2.3.1 com.apple.driver.AppleUSBHub 5.5.5 com.apple.driver.AppleFWOHCI 4.9.6 com.apple.driver.AirPort.Atheros40 600.72.2 com.apple.driver.AppleRTC 1.5 com.apple.driver.AppleAHCIPort 2.5.2 com.apple.nvenet 2.0.19 com.apple.driver.AppleUSBEHCI 5.5.0 com.apple.driver.AppleUSBOHCI 5.2.5 com.apple.driver.AppleEFINVRAM 1.7 com.apple.driver.AppleHPET 1.8 com.apple.driver.AppleACPIButtons 1.7 com.apple.driver.AppleSMBIOS 1.9 com.apple.driver.AppleACPIEC 1.7 com.apple.driver.AppleAPIC 1.6 com.apple.driver.AppleIntelCPUPowerManagementClient 196.0.0 com.apple.nke.applicationfirewall 4.0.39 com.apple.security.quarantine 2.1 com.apple.driver.AppleIntelCPUPowerManagement 196.0.0 com.apple.driver.DspFuncLib 2.3.7fc4 com.apple.iokit.IOAudioFamily 1.8.9fc11 com.apple.kext.OSvKernDSPLib 1.6 com.apple.driver.IOPlatformPluginLegacy 1.0.0 com.apple.driver.AppleSMBusPCI 1.0.11d0 com.apple.driver.IOPlatformPluginFamily 5.3.0d51 com.apple.driver.AppleBacklightExpert 1.0.4 com.apple.driver.AppleSMBusController 1.0.11d0 com.apple.kext.AMD4600Controller 8.1.2 com.apple.kext.AMDSupport 8.1.2 com.apple.iokit.IOSurface 86.0.4 com.apple.iokit.IOSerialFamily 10.0.6 com.apple.iokit.IOBluetoothFamily 4.1.4f2 com.apple.driver.AppleGraphicsControl 3.4.5 com.apple.iokit.IONDRVSupport 2.3.7 com.apple.iokit.AppleBluetoothHCIControllerUSBTransport 4.1.4f2 com.apple.kext.triggers 1.0 com.apple.iokit.IOFireWireIP 2.2.5 com.apple.driver.AppleSMC 3.1.4d2 com.apple.driver.AppleHDAController 2.3.7fc4 com.apple.iokit.IOGraphicsFamily 2.3.7 com.apple.iokit.IOHDAFamily 2.3.7fc4 com.apple.iokit.IOUSBHIDDriver 5.2.5 com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.5.5 com.apple.iokit.IOBDStorageFamily 1.7 com.apple.iokit.IODVDStorageFamily 1.7.1 com.apple.iokit.IOCDStorageFamily 1.7.1 com.apple.iokit.IOSCSIBlockCommandsDevice 3.5.5 com.apple.iokit.IOUSBMassStorageClass 3.5.1 com.apple.driver.AppleUSBMergeNub 5.5.5 com.apple.driver.AppleUSBComposite 5.2.5 com.apple.iokit.IOAHCISerialATAPI 2.5.1 com.apple.iokit.IOSCSIArchitectureModelFamily 3.5.5 com.apple.iokit.IOUSBUserClient 5.5.5 com.apple.iokit.IOFireWireFamily 4.5.5 com.apple.iokit.IO80211Family 530.4 com.apple.iokit.IOAHCIFamily 2.3.1 com.apple.iokit.IONetworkingFamily 3.0 com.apple.iokit.IOUSBFamily 5.6.0 com.apple.driver.NVSMU 2.2.9 com.apple.driver.AppleEFIRuntime 1.7 com.apple.iokit.IOHIDFamily 1.8.1 com.apple.iokit.IOSMBusFamily 1.1 com.apple.security.sandbox 220.3 com.apple.kext.AppleMatch 1.0.0d1 com.apple.security.TMSafetyNet 7 com.apple.driver.DiskImages 345 com.apple.iokit.IOStorageFamily 1.8 com.apple.driver.AppleKeyStore 28.21 com.apple.driver.AppleACPIPlatform 1.7 com.apple.iokit.IOPCIFamily 2.7.3 com.apple.iokit.IOACPIFamily 1.4 com.apple.kec.corecrypto 1.0 Model: iMac10,1, BootROM IM101.00CC.B00, 2 processors, Intel Core 2 Duo, 3.06 GHz, 4 GB, SMC 1.53f13 Graphics: ATI Radeon HD 4670, ATI Radeon HD 4670, PCIe, 256 MB Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x31364A53463235363634485A2D3147314631 Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x31364A53463235363634485A2D3147314631 AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 4.0.72.0-P2P Bluetooth: Version 4.1.4f2 12041, 2 service, 18 devices, 1 incoming serial ports Network Service: Ethernet, Ethernet, en0 Network Service: AirPort, AirPort, en1 Serial ATA Device: Hitachi HDE721010SLA330, 1 TB Serial ATA Device: HL-DT-ST DVDRW GA11N USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0x24400000 / 2 USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0x26500000 / 2 USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x04500000 / 4 USB Device: USB Keyboard, 0x04f2 (Chicony Electronics Co., Ltd.), 0x0111, 0x04300000 / 3 USB Device: Microsoft Notebook Optical Mouse with Tilt Wheel, 0x045e (Microsoft Corporation), 0x00d2, 0x04100000 / 2 USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x06100000 / 2 USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0x06110000 / 3

That panic was not caused by third-party software. If the problem is recurrent, the possibilities are:
A stale or corrupt kernel cache
A damaged OS X installation
A fault in a peripheral device, if any
Corrupt non-volatile memory (NVRAM)
An internal hardware fault (including incompatible memory)
An obscure bug in OS X
You may already have ruled out some of these.
Rule out #1 by booting in safe mode and then rebooting as usual. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
You can rule out #2 and #3 by reinstalling the OS and testing with non-essential peripherals disconnected and aftermarket expansion cards removed, if applicable. Sometimes a clean reinstallation (after erasing the startup volume) may solve a problem that isn't solved by reinstalling in place, without erasing.
Corrupt NVRAM, which rarely causes panics, can be ruled out by resetting it.
If your model has user-replaceable memory, and you've upgraded the memory modules, reinstall the original memory and see whether there's any improvement. Be careful not to touch the gold contacts. Clean them with a mild solvent such as rubbing alcohol. Aftermarket memory must exactly match the technical specifications for your model. Memory that is either slower or faster than specified may be incompatible.
The Apple Hardware Test or Apple Diagnostics, though generally unreliable, will sometimes detect a fault. A negative test can't be depended on. Run the extended version of the test.
In the category of obscure bugs, reports suggest that FileVault may trigger kernel traps under some unknown conditions. Most, though not all, of these reports seem to involve booting from an aftermarket SSD. If those conditions apply to you, try deactivating FileVault.
Connecting more than one display is another reported trigger for OS X bugs.
If your system is not fully up to date, running Software Update might get you a bug fix.
In rare cases, a malformed network packet from a defective router or other network device can cause panics. Such packets could also be sent deliberately by a skillful attacker. This possibility is something to consider if you run a public server that might be the target of such an attack.
If none of the above applies, make a "Genius" appointment at an Apple Store to have the machine tested. You may have to leave it there for several days. There isn't much point in doing this unless you can reproduce the panic, or if you can't, it happens often enough that it's likely to be repeated at the store. Otherwise you may be told that nothing is wrong.
Print the first page of the panic report and bring it with you.
Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you know how to restore, and you have at least two independent backups.) Don’t erase the recovery partition, if present.
Keeping your confidential data secure during hardware repair
*An SSD doesn't need to be zeroed.

My iMac has stopped waking for network access

My iMac has stopped responding for network access. I have two iMacs on the network, both are configured, for sharing and Power saving, the same. I use ReadPixels' Wake on Lan or Go connect to server from the finder, neither one will wake one iMac. the other iMac works fine. I used to be able to wake the other iMac either way but for some reason, recently (I don't use the feature often) it has stopped working. The Wake on Lan program shows "My other iMac" as being awake. When "My other iMac" is awake I have no problem logging on.
When attemting access using the finder "Go connect to server" I get this message. The server "My other iMac" may not exist or it is unavailable at this time. Check the server name or IP address, check your network connection and then try again.
Any hints?

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, or by a peripheral device.
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. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs. The next normal boot may also be somewhat slow.
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? After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

HT1212 After working perfectly for two years my iTouch has suddenly stopped connecting to my Hub. I have tried everything I can think of to get it working again but to no avail. My desktop computer still works through the same hub

After working perfectly for two years my iTouch has suddenly stopped connecting to my Hub although my desktop computer still connects. I have tried everything I can think of, including suggestions off Google/You Tube but nothing makes any difference. Any ideas. Surely it is not fit for the scrap heap after two years, but is clearly no use as it is.

Does the iOS device connect to other networks? If yes that tend to indicate a problem with your network.
Does the iOS device see the network?
Any error messages?
Do other devices now connect?
Did the iOS device connect before?
Try the following to rule out a software problem:
- Reset the iOS device. Nothing will be lost
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Power off and then back on your router
.- Reset network settings: Settings>General>Reset>Reset Network Settings
- iOS: Troubleshooting Wi-Fi networks and connections
- Wi-Fi: Unable to connect to an 802.11n Wi-Fi network
- iOS: Recommended settings for Wi-Fi routers and access points
- Restore from backup. See:
iOS: How to back up
- Restore to factory settings/new iOS device.
If still problem and it does not connect to any networks make an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem.
Apple Retail Store - Genius Bar

My ipad has suddenly stopped connecting to the internet. The settings have not been changed. Why is this?

My ipad has suddenly stopped connecting to the intenet via my home wifi system. The settings have notbeen changed. why is this?

The first thing to try is to power down your modem and router for about 30 seconds, then repowering by plugging them back in.
Also, if that doesn't work, on your iPad you can try going into settings/safari/clear history/clear data and cookies.

Macbook Pro suddenly stops connecting to wifi

So yesterday, my macbook pro suddenly stopped connecting to any wifi sources at all. Instead after trying to connect, it just gives me the icon with the ! mark, saying that there is no connection made. I've tried multiple routers/sources, and they all don't work. The only reason I'm even connected to the internet right now is through tethering via usb (when I try to make my phone a hotspot, my computer doesn't read it, of course).
Does anyone have any idea why this would happen?
My software is up to date, completely. Macbook Pro, 2010 model, OS X Lion 10.7.3

Give a call to ISP tech support.
If you have time to read, the link below will take you to the Apple support site.
http://support.apple.com/kb/HT4628?viewlocale=en_US

HT1976 iPhone 5 has suddenly stopped connecting to the internet away from home

My iPhone 5 has suddenly stopped connecting to the internet when away from home. It was fine last Wednesday, then on Thursday all I got was 'Safari is no longer connected to the internet'. I cannot use the Messaging, Find my Friends etc.
As far as I know I have not done anything to alter any settings, but I did change my password on Wednesday - which works, so I think that's OK.
Has anyone any idea what is happening?
ictoau

Hello, ictoau.
Thank you for the question. You may find this article helpful in troubleshooting the carrier data connection issue you are experiencing.
iPhone: Troubleshooting a cellular data connection
http://support.apple.com/kb/ts3780
Cheers,
Jason H.

Why has my iPad suddenly stopped connecting to Yahoo? Blackberry and PC working normally.

why has my iPad suddenly stopped connecting to yahoo and gmail through my router? PC and BlackBerry linking normally.

yahoo having issues check their website should work soon

Imac and Macbook Pro suddenly stopped connecting to my wireless network

I am having the strangest problem. I've had a linksys router for years and my network has worked fine. I have a 2008 iMac, a new Mac Book Pro, Xbox 360, and a PS3 connected to it. Yesterday, the Apple products stopped connecting to the linksys, however the Xbox and PS3 connected fine. I thought it was my router being the problem so I went to Apple Store and bought an airport express to just set that up as my primary router. I could not set it up the normal way wirelessly as neither my iMac or MBP would pick it up via the Airport Utility tool. I had to hardwire it to my iMac to get it set up. It seemed to not be working however the green light did eventually come on. My xbox connected to it fine, however the iMac and MBP would not connect. Both did end up connecting but only for a short time and now neither can find the Airport Express. Does anyone have any suggestions as to what my problem is? It just doesnt make sense that both mac computers stopped picking up the linksys at the same time, and neither will really pick up the Airport express either. I'm just so distraught over this because I had everything working fine such as sharing files, wireless printer, Apple TV, etc.

Hi there, I have exactly the same problem, one year with imac and a few months ago my wireless network disconnected and kept disconnecting and connecting on and off, it's not the Internet because laptop and other aps are ok
Today I tried contacting Virginmedia to see if they could help and they told they are not trained for mac! Anyway they suggested to try to use the "renew DHCP lease" button in the TCP/IP page in network settings and it seems it is working better now, lets see if it lasts...

My iPad suddenly stopped connecting to my home network. It shows the network to. Choose from but there is no IP address or other information on the network page. It is set on DHCP and proxy is set at auto. Do I have another setting wrong?

My iPad suddenly stopped working with my home network. It shows the network to choose from but will not connect. When I look at details in that network it does not show IP address or any other info for the network. Setting is on DHCP and http proxy is set on auto. Network is active and can connect on wife's iPad and other home computers. Do I have another setting wrong?

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
~~~~~~~~~~~~~~~~~~~~~~~~~
iOS 6 Wifi Problems/Fixes
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 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/
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.
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If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

Imac suddenly stopped connecting to network

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