Could external monitor cause kernal panic?

Hi there, I'm trying to track down the cause of a couple of nasty kernal panics that have caused me to have to zero my hard disk and re-install twice in the last couple of weeks.
The last panic log I have (not certain it contains info from the last panic) has no reference to software as far as I can tell, I checked the memory with the apple hardware test and a freeware app called Rember, both tests came up fine.
I use a cheap and cheerful LCD monitor for a split screen Logic Pro setup. I noticed that the grey screen with the apple logo distorts while OSX is booting when the extra monitor is plugged in...... It's made me wonder if that is the source of my troubles, could that be the case?

Hardware or software can cause the kernel panic. You don't have to waste time and zero out your drive. Just isolate the cause whether it be software or hardware then deal with it.
If you decide to re-install OSX then don't add anything but that monitor and see what happens.

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    Message was edited by: eww

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    Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
    0x108918 : 0x12b4c6 (0x45f91c 0x10894c 0x13355c 0x0)
    0x108968 : 0x1ab0fe (0x469a98 0xd4545d 0xe 0x469248)
    0x108a48 : 0x1a1713 (0x108a60 0x108ab4 0x108b18 0xd4545d)
    0x108a58 : 0xd4545d (0xe 0x286f0048 0x10 0x10)
    0x108b18 : 0xd45fa4 (0x0 0x2f 0x12 0x0)
    0x108b58 : 0xd46109 (0x0 0x0 0x0 0x528ce8)
    0x108cb8 : 0xd46267 (0x1 0x4 0xd50d7c 0x0)
    0x108cf8 : 0xd46085 (0x4 0xd50d7c 0x0 0x0)
    0x108d38 : 0xd3a71f (0xd523e8 0xd52ebc 0x0 0x0)
    0x108d98 : 0xd33912 (0x43cb410 0x108e58 0x1 0x1)
    0x108dd8 : 0xd35ec8 (0x43cb410 0xd5843c 0x108e58 0x40)
    0x108e08 : 0xd35efd (0x43cb410 0x8 0x108e58 0x0)
    0x108e38 : 0xd32b1b (0x43cb410 0x8 0x108e58 0x49f78b8)
    0x108ea8 : 0xd41d66 (0x43cb410 0xd568b4 0x10c60 0x6)
    0x108ed8 : 0xd1a2b3 (0x4bb5954 0x3de13c50 0xd 0xd568b4)
    0x108f08 : 0x6aacbd (0x4794440 0x36 0x23eff000 0x0)
              Backtrace continues...
          Kernel loadable modules in backtrace (with dependencies):
             com.apple.kext.ATY_Hypoprion(5.4.8)@0xce5000->0xd5ffff
                dependency: com.apple.iokit.IONDRVSupport(1.7.3)@0x6a0000
                dependency: com.apple.iokit.IOPCIFamily(2.6)@0x5ce000
                dependency: com.apple.iokit.IOGraphicsFamily(1.7.3)@0x683000
                dependency: com.apple.iokit.IOACPIFamily(1.2.0)@0x627000
             com.apple.iokit.IONDRVSupport(1.7.3)@0x6a0000->0x6adfff
                dependency: com.apple.iokit.IOPCIFamily(2.6)@0x5ce000
                dependency: com.apple.iokit.IOGraphicsFamily(1.7.3)@0x683000
    BSD process name corresponding to current thread: WindowServer
    Mac OS version:
    9L31a
    Kernel version:
    Darwin Kernel Version 9.8.0: Wed Jul 15 16:55:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_I386
    System model name: iMac7,1 (Mac-F4238CC8)
    System uptime in nanoseconds: 1421066020480
    unloaded kexts:
    com.apple.driver.InternalModemSupport          2.4.0 - last unloaded 125555815961
    loaded kexts:
    com.apple.driver.InternalModemSupport          2.4.0 - last loaded 18399940146
    com.apple.driver.AppleHDAPlatformDriver          1.7.1a2
    com.apple.iokit.IOBluetoothSerialManager          2.1.8f2
    com.apple.filesystems.autofs          2.0.2
    com.apple.driver.AppleUpstreamUserClient          2.7.5
    com.apple.driver.AppleHDAHardwareConfigDriver          1.7.1a2
    com.apple.driver.AppleHDA          1.7.1a2
    com.apple.kext.ATY_Hypoprion          5.4.8
    com.apple.driver.AppleHWSensor          1.9d0
    com.apple.Dont_Steal_Mac_OS_X          6.0.3
    com.apple.driver.AppleGraphicsControl          2.8.15
    com.apple.driver.AppleTyMCEDriver          1.0.0d28
    com.apple.driver.AppleHDAController          1.7.1a2
    com.apple.iokit.IOFireWireIP          1.7.7
    com.apple.driver.AudioIPCDriver          1.0.6
    com.apple.ATIRadeonX2000          5.4.8
    com.apple.driver.AppleIRController          113
    com.apple.driver.ACPI_SMC_PlatformPlugin          3.4.0a17
    com.apple.driver.AppleLPC          1.3.1
    com.apple.driver.AppleBacklight          1.6.0
    com.apple.driver.CSRUSBBluetoothHCIController          2.1.8f2
    com.apple.driver.AppleUSBHIDMouse          1.2.4b3
    com.apple.driver.AppleHIDKeyboard          1.0.9b4
    com.apple.driver.CSRHIDTransitionDriver          2.1.8f2
    com.apple.driver.iTunesPhoneDriver          1.0
    com.apple.iokit.IOUSBMassStorageClass          2.0.8
    com.apple.driver.AppleUSBMergeNub          3.4.6
    com.apple.driver.PioneerSuperDrive          2.0.9
    com.apple.iokit.SCSITaskUserClient          2.1.1
    com.apple.driver.XsanFilter          2.7.91
    com.apple.driver.AirPortBrcm43xx          366.91.21
    com.apple.driver.AppleFileSystemDriver          1.1.0
    com.apple.iokit.IOAHCIBlockStorage          1.2.2
    com.apple.iokit.IOATAPIProtocolTransport          1.5.3
    com.apple.driver.AppleFWOHCI          3.9.7
    com.apple.driver.AppleUSBHub          3.4.9
    com.apple.iokit.IOUSBUserClient          3.4.9
    com.apple.driver.AppleAHCIPort          1.7.0
    com.apple.driver.AppleIntelPIIXATA          2.0.1
    com.apple.driver.AppleUSBEHCI          3.4.6
    com.apple.driver.AppleUSBUHCI          3.3.5
    com.apple.iokit.AppleYukon2          3.1.13b2
    com.apple.driver.AppleEFINVRAM          1.2.0
    com.apple.driver.AppleRTC          1.2.3
    com.apple.driver.AppleHPET          1.4
    com.apple.driver.AppleACPIPCI          1.2.5
    com.apple.driver.AppleACPIButtons          1.2.5
    com.apple.driver.AppleSMBIOS          1.4
    com.apple.driver.AppleACPIEC          1.2.5
    com.apple.driver.AppleAPIC          1.4
    com.apple.security.seatbelt          107.12
    com.apple.nke.applicationfirewall          1.6.77
    com.apple.security.TMSafetyNet          3
    com.apple.driver.AppleIntelCPUPowerManagement          76.2.0
    com.apple.driver.DiskImages          199
    com.apple.BootCache          30.4
    com.apple.iokit.IOSerialFamily          9.4
    com.apple.driver.DspFuncLib          1.7.1a2
    com.apple.iokit.IOHDAFamily          1.7.1a2
    com.apple.iokit.IOAudioFamily          1.6.9fc5
    com.apple.kext.OSvKernDSPLib          1.1
    com.apple.driver.IOPlatformPluginFamily          3.4.0a17
    com.apple.driver.AppleSMC          2.3.1d1
    com.apple.iokit.IONDRVSupport          1.7.3
    com.apple.iokit.IOGraphicsFamily          1.7.3
    com.apple.driver.AppleUSBBluetoothHCIController          2.1.8f2
    com.apple.iokit.IOBluetoothFamily          2.1.8f2
    com.apple.driver.AppleHIDMouse          1.2.4b3
    com.apple.iokit.IOUSBHIDDriver          3.4.6
    com.apple.driver.AppleUSBComposite          3.2.0
    com.apple.iokit.IOSCSIMultimediaCommandsDevice          2.1.1
    com.apple.iokit.IOSCSIBlockCommandsDevice          2.1.1
    com.apple.iokit.IOBDStorageFamily          1.5
    com.apple.iokit.IODVDStorageFamily          1.5
    com.apple.iokit.IOCDStorageFamily          1.5
    com.apple.iokit.IO80211Family          216.1
    com.apple.iokit.IOSCSIArchitectureModelFamily          2.1.1
    com.apple.iokit.IOFireWireFamily          3.4.9
    com.apple.iokit.IOAHCIFamily          1.5.0
    com.apple.iokit.IOATAFamily          2.0.1
    com.apple.iokit.IOUSBFamily          3.4.9
    com.apple.iokit.IONetworkingFamily          1.6.1
    com.apple.driver.AppleEFIRuntime          1.2.0
    com.apple.iokit.IOSMBusFamily          1.1
    com.apple.iokit.IOStorageFamily          1.5.6
    com.apple.iokit.IOHIDFamily          1.5.5
    com.apple.driver.AppleACPIPlatform          1.2.5
    com.apple.iokit.IOACPIFamily          1.2.0
    com.apple.iokit.IOPCIFamily          2.6

    Solution: The GPU heat sink temperature sensor was faulty.  I couldn't figure out what part number the temperature sensor was, so I just ordered a new GPU heat sink off e-bay for $12.  The heat sink assembly contains the temperature sensor.  I installed the heat sink (including removing/applying thermal paste), and voila!  The kernel panics are gone.  The faulty heat sink temp sensor was causing the temp. to read hotter than it actually was, so when it read too hot (GPU diode ~120 Celsius), I got a kernel panic. 
    After I installed the new heat sink (with new GPU heatsink temp. sensor), the GPU temperatures read normal, and the Apple Hardware Test showed no problems (before it was giving an error code of 4SNS/1/40000000:TG0H).
    Ahh, the sweet satisfaction of fixing this problem myself for $12 without ever having to deal with Apple.

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