Audio output to Speakers

I have been using the mac for quite some time with a logitech 2.1 speaker system. Use was fine for a considerable amount of time, until one day I noticed there was no sound going to left speaker. I have checked the balance for line out in System Preferences > Sound and it is in the middle. I have tried with other speakers and earphone, and they all output to only one speaker. These same speakers and earphone work fine with other devices (iPod, PC).
Furthermore, when I remove the audio out plug, the internal speakers work on both left and right channel.
Anyone have any ideas what might be causing this, or how to solve the problem without a service? Has this happended to anyone else?
iMac G5 2.0ghz   Mac OS X (10.4.3)   1GB ram.

try going to utilities/audio midi setup and go to configure speakers.
you might have both speakers set to channel 1 or 2. Also try meesing around with 2ch-16 bit and 2ch-24 bit options.

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    0xffffff80984984e0 : 0xffffff7f9b76ed4e
    0xffffff8098498510 : 0xffffff7f9b76ed4e
    0xffffff8098498540 : 0xffffff7f9b76ed4e
    0xffffff8098498570 : 0xffffff7f9b76ed4e
    0xffffff80984985a0 : 0xffffff7f9b76ed4e
    0xffffff80984985d0 : 0xffffff7f9b76ed4e
    0xffffff8098498600 : 0xffffff7f9b76ed4e
    0xffffff8098498630 : 0xffffff7f9b76ed4e
    0xffffff8098498660 : 0xffffff7f9b76ed4e
    0xffffff8098498690 : 0xffffff7f9b76ed4e
    0xffffff80984986c0 : 0xffffff7f9b76ed4e
    0xffffff80984986f0 : 0xffffff7f9b76ed4e
    0xffffff8098498720 : 0xffffff7f9b76ed4e
    0xffffff8098498750 : 0xffffff7f9b76ed4e
    0xffffff8098498780 : 0xffffff7f9b76ed4e
    0xffffff80984987b0 : 0xffffff7f9b76ed4e
    0xffffff80984987e0 : 0xffffff7f9b76ed4e
    0xffffff8098498810 : 0xffffff7f9b76ed4e
    0xffffff8098498840 : 0xffffff7f9b76ed4e
    0xffffff8098498870 : 0xffffff7f9b76ed4e
    0xffffff80984988a0 : 0xffffff7f9b76ed4e
    0xffffff80984988d0 : 0xffffff7f9b76ed4e
    0xffffff8098498900 : 0xffffff7f9b76ed4e
    0xffffff8098498930 : 0xffffff7f9b76ed4e
    0xffffff8098498960 : 0xffffff7f9b76ed4e
    0xffffff8098498990 : 0xffffff7f9b76ed4e
    0xffffff80984989c0 : 0xffffff7f9b76ed4e
    0xffffff80984989f0 : 0xffffff7f9b76ed4e
    0xffffff8098498a20 : 0xffffff7f9b76ed4e
    0xffffff8098498a50 : 0xffffff7f9b76ed4e
    0xffffff8098498a80 : 0xffffff7f9b76ed4e
    0xffffff8098498ab0 : 0xffffff7f9b76ed4e
    0xffffff8098498ae0 : 0xffffff7f9b76ed4e
    0xffffff8098498b10 : 0xffffff7f9b76ed4e
    0xffffff8098498b40 : 0xffffff7f9b76ed4e
    0xffffff8098498b70 : 0xffffff7f9b76ed4e
    0xffffff8098498ba0 : 0xffffff7f9b76ed4e
    0xffffff8098498bd0 : 0xffffff7f9b76ed4e
    0xffffff8098498c00 : 0xffffff7f9b76ed4e
    0xffffff8098498c30 : 0xffffff7f9b76ed4e
    0xffffff8098498c60 : 0xffffff7f9b76ed4e
    0xffffff8098498c90 : 0xffffff7f9b76ed4e
    0xffffff8098498cc0 : 0xffffff7f9b76ed4e
    0xffffff8098498cf0 : 0xffffff7f9b76ed4e
    0xffffff8098498d20 : 0xffffff7f9b76ed4e
    0xffffff8098498d50 : 0xffffff7f9b76ed4e
    0xffffff8098498d80 : 0xffffff7f9b76ed4e
    0xffffff8098498db0 : 0xffffff7f9b76ed4e
    0xffffff8098498de0 : 0xffffff7f9b76ed4e
    0xffffff8098498e10 : 0xffffff7f9b76ed4e
    0xffffff8098498e40 : 0xffffff7f9b76ed4e
    0xffffff8098498e70 : 0xffffff7f9b76ed4e
    0xffffff8098498ea0 : 0xffffff7f9b76ed4e
    0xffffff8098498ed0 : 0xffffff7f9b76ed4e
    0xffffff8098498f00 : 0xffffff7f9b76ed4e
    0xffffff8098498f30 : 0xffffff7f9b76ed4e
    0xffffff8098498f60 : 0xffffff7f9b76ed4e
              Backtrace continues...
          Kernel Extensions in backtrace:
             org.netkas.driver.FakeSMC(4.3.5)[3F187661-5A36-380C-B185-CCF36AC23EEC]@0xffffff 7f9ad3e000->0xffffff7f9ad4efff
                dependency: com.apple.iokit.IOACPIFamily(1.4)[A35915E8-C1B0-3C0F-81DF-5515BC9002FC]@0xfffff f7f9ac96000
             com.apple.driver.AppleSMC(3.1.4d2)[4B8F00BB-1BA5-390A-A135-A583EF553E77]@0xffff ff7f9b76c000->0xffffff7f9b777fff
                dependency: com.apple.iokit.IOACPIFamily(1.4)[A35915E8-C1B0-3C0F-81DF-5515BC9002FC]@0xfffff f7f9ac96000
    BSD process name corresponding to current thread: launchd
    Mac OS version:
    12D78
    Kernel version:
    Darwin Kernel Version 12.3.0: Sun Jan  6 22:37:10 PST 2013; root:xnu-2050.22.13~1/RELEASE_X86_64
    Kernel UUID: 3EB7D8A7-C2D3-32EC-80F4-AB37D61492C6
    Kernel slide:     0x0000000019e00000
    Kernel text base: 0xffffff801a000000
    System model name: iMac8,1 (Mac-F226BEC8)
    System uptime in nanoseconds: 8167304771793
    last loaded kext at 2530775124296: com.apple.driver.AudioAUUC          1.60 (addr 0xffffff7f9bf8d000, size 28672)
    last unloaded kext at 2614514859870: com.apple.driver.AudioAUUC          1.60 (addr 0xffffff7f9bf8d000, size 20480)
    loaded kexts:
    com.tuxera.filesystems.tufsfs.fusefs_txantfs          2011.4.23
    net.telestream.driver.TelestreamAudio          1.0.5
    com.LivestreamProcaster.driver.ProcasterAudioRedirector          2.0.0
    com.markspace.driver.Android.RNDIS          1.2
    com.logmein.hamachi          1.0
    com.usboverdrive.driver.hid          3.0.1
    org.hwsensors.driver.GPUSensors          1.0.14
    org.hwsensors.driver.CPUSensors          2.0.1
    org.netkas.driver.FakeSMC          4.3.5
    org.tgwbd.driver.NullCPUPowerManagement          1.0.0d2
    es.osx86.driver.EvOreboot          1.0.3
    com.apple.driver.IOBluetoothSCOAudioDriver          4.1.3f3
    com.apple.driver.IOBluetoothA2DPAudioDriver          4.1.3f3
    com.apple.filesystems.smbfs          1.8
    com.apple.driver.AppleHWSensor          1.9.5d0
    com.apple.iokit.IOUserEthernet          1.0.0d1
    com.apple.iokit.IOBluetoothSerialManager          4.1.3f3
    com.apple.driver.AppleUpstreamUserClient          3.5.10
    com.apple.Dont_Steal_Mac_OS_X          7.0.0
    com.apple.kext.AMDFramebuffer          8.1.0
    com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.1.3f3
    com.apple.driver.AppleHDA          2.3.7fc4
    com.apple.driver.AppleBacklight          170.2.5
    com.apple.ATIRadeonX2000          8.1.0
    com.apple.driver.AppleSMCPDRC          1.0.0
    com.apple.iokit.AppleYukon2          3.2.3b1
    com.apple.driver.ApplePolicyControl          3.3.0
    com.apple.driver.AirPortBrcm43224          600.36.17
    com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
    com.apple.driver.AppleLPC          1.6.0
    com.apple.driver.AppleMCCSControl          1.1.11
    com.apple.filesystems.autofs          3.0
    com.apple.driver.AppleIRController          320.15
    com.apple.iokit.SCSITaskUserClient          3.5.5
    com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
    com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
    com.apple.BootCache          34
    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.AppleEFINVRAM          1.7
    com.apple.driver.AppleAHCIPort          2.5.1
    com.apple.driver.AppleIntelPIIXATA          2.5.1
    com.apple.driver.AppleUSBEHCI          5.5.0
    com.apple.driver.AppleUSBUHCI          5.2.5
    com.apple.driver.AppleRTC          1.5
    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.nke.applicationfirewall          4.0.39
    com.apple.security.quarantine          2
    com.apple.driver.AppleIntelCPUPowerManagement          196.0.0
    com.apple.iokit.IOSurface          86.0.4
    com.apple.iokit.IOSerialFamily          10.0.6
    com.apple.driver.DspFuncLib          2.3.7fc4
    com.apple.iokit.IOAudioFamily          1.8.9fc11
    com.apple.kext.OSvKernDSPLib          1.6
    com.apple.driver.AppleBacklightExpert          1.0.4
    com.apple.iokit.IOFireWireIP          2.2.5
    com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.1.3f3
    com.apple.driver.AppleGraphicsControl          3.3.0
    com.apple.iokit.IONDRVSupport          2.3.7
    com.apple.iokit.IO80211Family          522.4
    com.apple.iokit.IONetworkingFamily          3.0
    com.apple.driver.AppleHDAController          2.3.7fc4
    com.apple.iokit.IOHDAFamily          2.3.7fc4
    com.apple.driver.AppleSMC          3.1.4d2
    com.apple.driver.IOPlatformPluginLegacy          1.0.0
    com.apple.driver.IOPlatformPluginFamily          5.3.0d51
    com.apple.driver.AppleSMBusController          1.0.11d0
    com.apple.kext.AMD2600Controller          8.1.0
    com.apple.kext.AMDSupport          8.1.0
    com.apple.iokit.IOGraphicsFamily          2.3.7
    com.apple.kext.triggers          1.0
    com.apple.driver.IOBluetoothHIDDriver          4.1.3f3
    com.apple.iokit.IOBluetoothFamily          4.1.3f3
    com.apple.iokit.IOSCSIBlockCommandsDevice          3.5.5
    com.apple.iokit.IOUSBMassStorageClass          3.5.1
    com.apple.driver.AppleUSBHIDKeyboard          170.2
    com.apple.driver.AppleHIDKeyboard          170.2
    com.apple.iokit.IOUSBHIDDriver          5.2.5
    com.apple.driver.AppleUSBMergeNub          5.5.5
    com.apple.driver.AppleUSBComposite          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.IOATAPIProtocolTransport          3.5.0
    com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.5
    com.apple.iokit.IOUSBUserClient          5.5.5
    com.apple.iokit.IOFireWireFamily          4.5.5
    com.apple.iokit.IOAHCIFamily          2.3.1
    com.apple.iokit.IOATAFamily          2.5.1
    com.apple.iokit.IOUSBFamily          5.5.5
    com.apple.driver.AppleEFIRuntime          1.7
    com.apple.iokit.IOHIDFamily          1.8.1
    com.apple.iokit.IOSMBusFamily          1.1
    com.apple.security.sandbox          220.2
    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

  • Built in audio output (speakers) are playing through different channels.

    My built in audio output (speakers) are playing through different channels. How do I make them both play through the same channel? It has something to do with the audio midi setup. When i click "Configure Speakers" on th Built-In Output I don't get the option of "-" for which channel the audio should go out of, I just get "1" or "2" as an option. This happens when i select them to be both stero and multichannel speakers. Any ideas on how to fix it?

    Is there a red light glowing inside the jack? It sounds like a faulty jack. Read this:
    http://forums.macrumors.com/archive/index.php/t-232084.html
    -Bmer
    Mac Owners Support Group
    Join Us @ MacOSG.com
    iTunes: MacOSG Podcast
     An Apple User Group 

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