IMac will not boot from any mode except Target Disk

I have an Early 2008 Penryn iMac 24" MB398LL/A running OS X 10.7.4 (see specs below) that will not boot from ANY mode, It also has several strange vertical bars from top to bottom on the screen. They are about 10 px wide, with some pixels empty and looks a bit like a barcode if you squint at it.
I have tried Safe Boot, Force Boot, DVD Boot, FireWire/USB Boot,  and it always gets to the same point. It gets to the apple screen with the spinning gear and then after about 8 seconds it freezes. The only way it works at all is in Target Disk Mode. It pops right up on my Macbook Pro and I was able to grab all my info!
I have run Disc Utilities and Tech Tool on it many times from my MBP and it passes every test.
I reformatted the HD and installed 10.7 again, it still freezes up at the same point. 
I have tried using Single User mode and every time have had to run /sbin/fsck -fy twice because it always says the disk is ok but it was modified on the first pass.
I thought maybe it had a bad video card or logic board but and I ran the Apple Hardware Test on many occasions and it always passes. Recently I was told about Loop Mode and just completed running the AHT for just over 30 hours without any errors at all.
UPDATE...
Strange Part… I tried installing Mountain Lion in Target Disk Mode and everything went smoothly. When it restarted on its own the lines on the screen were gone for the moment, but the Mac still freezes up on the spinning gear and immediately restarts on its own.  I have run every thing listed above on it and still nothing. Sometimes the lines reappear then in two more starts they are gone.
I did manage to have it start one time got a copy of the  the error report (its at the bottom too) The Mac ran for at least 30 minutes with no problems, then the screen went crazy a few seconds and it became unresponsive. The mouse moved but that was all it could do. Now my iMac continually restarts itself, I don't have any more ideas, HELP!
Specs...
The iMac "Core 2 Duo" 3.06 24-Inch Aluminum (Early 2008/Penryn) features a 3.06 GHz Intel "Core 2 Duo" processor (E8435), with two independent processor "cores" on a single silicon chip, a 6 MB shared level 2 cache, a 1066 MHz system bus, 2 GB of RAM (800 MHz DDR2 SDRAM, PC2-6400), a 500 GB (7200 RPM) Serial ATA hard drive, a vertically-mounted slot-loading DVD±R DL "SuperDrive", NVIDIA GeForce 8800 GS graphics acceleration with 512 MB of GDDR3 memory, a built-in iSight video camera, and built-in stereo speakers underneath the 24" glossy TFT Active Matrix LCD (1920x1200 native) display.
Error Report…
Sat Sep  1 17:13:12 2012
panic(cpu 0 caller 0xffffff801a4b7b95): Kernel trap at 0xffffff7f9bab8654, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0x0000000000000010, CR3: 0x0000000011803000, CR4: 0x0000000000000660
RAX: 0x0000000000000001, RBX: 0xffffff8050e00000, RCX: 0xffffff801aa8eb00, RDX: 0xffffff80602dba38
RSP: 0xffffff80602dbb60, RBP: 0xffffff80602dbb60, RSI: 0x0000000000000000, RDI: 0x0000000000000000
R8:  0x0000000000000000, R9:  0x00000000000000ff, R10: 0xffffffffffffffff, R11: 0x00000000ffffffff
R12: 0xffffff8050e00000, R13: 0x0000000000000000, R14: 0x0000000000000002, R15: 0x0000000000000000
RFL: 0x0000000000010246, RIP: 0xffffff7f9bab8654, CS:  0x0000000000000008, SS:  0x0000000000000010
Fault CR2: 0x0000000000000010, Error code: 0x0000000000000000, Fault CPU: 0x0

Here is the complete error log...
Sat Sep  1 17:13:12 2012
panic(cpu 0 caller 0xffffff801a4b7b95): Kernel trap at 0xffffff7f9bab8654, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0x0000000000000010, CR3: 0x0000000011803000, CR4: 0x0000000000000660
RAX: 0x0000000000000001, RBX: 0xffffff8050e00000, RCX: 0xffffff801aa8eb00, RDX: 0xffffff80602dba38
RSP: 0xffffff80602dbb60, RBP: 0xffffff80602dbb60, RSI: 0x0000000000000000, RDI: 0x0000000000000000
R8:  0x0000000000000000, R9:  0x00000000000000ff, R10: 0xffffffffffffffff, R11: 0x00000000ffffffff
R12: 0xffffff8050e00000, R13: 0x0000000000000000, R14: 0x0000000000000002, R15: 0x0000000000000000
RFL: 0x0000000000010246, RIP: 0xffffff7f9bab8654, CS:  0x0000000000000008, SS:  0x0000000000000010
Fault CR2: 0x0000000000000010, Error code: 0x0000000000000000, Fault CPU: 0x0
Backtrace (CPU 0), Frame : Return Address
0xffffff80602db800 : 0xffffff801a41d5f6
0xffffff80602db870 : 0xffffff801a4b7b95
0xffffff80602dba40 : 0xffffff801a4ce4ad
0xffffff80602dba60 : 0xffffff7f9bab8654
0xffffff80602dbb60 : 0xffffff7f9baa218c
0xffffff80602dbbb0 : 0xffffff7f9baa20e2
0xffffff80602dbbd0 : 0xffffff7f9ba73554
0xffffff80602dbc00 : 0xffffff7f9aa8d470
0xffffff80602dbc40 : 0xffffff7f9aa8d3df
0xffffff80602dbc60 : 0xffffff7f9aa926ec
0xffffff80602dbcf0 : 0xffffff7f9aa8af20
0xffffff80602dbd20 : 0xffffff7f9aadacc7
0xffffff80602dbd70 : 0xffffff801a833b9b
0xffffff80602dbdc0 : 0xffffff801a862d57
0xffffff80602dbe30 : 0xffffff801a497cef
0xffffff80602dbe80 : 0xffffff801a420abd
0xffffff80602dbeb0 : 0xffffff801a410448
0xffffff80602dbf00 : 0xffffff801a4195fb
0xffffff80602dbf70 : 0xffffff801a4a5ad6
0xffffff80602dbfb0 : 0xffffff801a4ced13
      Kernel Extensions in backtrace:
         com.apple.iokit.IOGraphicsFamily(2.3.4)[2600903C-EEDE-321B-A023-169DC9B26EA6]@0 xffffff7f9aa81000->0xffffff7f9aab8fff
            dependency: com.apple.iokit.IOPCIFamily(2.7)[8C9E06A4-13D0-33F5-A377-9E36F0ECC229]@0xffffff 7f9aa4d000
         com.apple.NVDAResman(8.0)[6A699209-FB98-316B-A3C0-DCA82AA8C86B]@0xffffff7f9aad8 000->0xffffff7f9addafff
            dependency: com.apple.iokit.IOPCIFamily(2.7)[8C9E06A4-13D0-33F5-A377-9E36F0ECC229]@0xffffff 7f9aa4d000
            dependency: com.apple.iokit.IONDRVSupport(2.3.4)[99CA4184-8D92-31B2-8726-46139E8E3DFF]@0xff ffff7f9aac4000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[2600903C-EEDE-321B-A023-169DC9B26EA6]@0 xffffff7f9aa81000
         com.apple.GeForce(8.0)[4B9BE287-5251-398E-96B0-BB16C9BFB2D9]@0xffffff7f9ba72000 ->0xffffff7f9bb34fff
            dependency: com.apple.NVDAResman(8.0.0)[6A699209-FB98-316B-A3C0-DCA82AA8C86B]@0xffffff7f9aa d8000
            dependency: com.apple.iokit.IONDRVSupport(2.3.4)[99CA4184-8D92-31B2-8726-46139E8E3DFF]@0xff ffff7f9aac4000
            dependency: com.apple.iokit.IOPCIFamily(2.7)[8C9E06A4-13D0-33F5-A377-9E36F0ECC229]@0xffffff 7f9aa4d000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[2600903C-EEDE-321B-A023-169DC9B26EA6]@0 xffffff7f9aa81000
BSD process name corresponding to current thread: WindowServer
Mac OS version:
12B19
Kernel version:
Darwin Kernel Version 12.1.0: Tue Aug 14 13:29:55 PDT 2012; root:xnu-2050.9.2~1/RELEASE_X86_64
Kernel UUID: 3005059E-270B-3B9F-940D-7A66C05DDC9D
Kernel slide:     0x000000001a200000
Kernel text base: 0xffffff801a400000
System model name: iMac8,1 (Mac-F227BEC8)
System uptime in nanoseconds: 26349024446
last loaded kext at 22534854703: com.apple.driver.AppleHDAHardwareConfigDriver          2.3.0f2 (addr 0xffffff7f9c489000, size 12288)
loaded kexts:
com.apple.driver.AppleHDAHardwareConfigDriver          2.3.0f2
com.apple.driver.AppleHDA          2.3.0f2
com.apple.driver.AppleTyMCEDriver          1.0.2d2
com.apple.filesystems.autofs          3.0
com.apple.iokit.IOBluetoothSerialManager          4.0.9f8
com.apple.iokit.IOBluetoothUSBDFU          4.0.9f8
com.apple.driver.AppleLPC          1.6.0
com.apple.driver.AppleMuxControl          3.2.6
com.apple.driver.AppleBacklight          170.2.3
com.apple.driver.AppleUpstreamUserClient          3.5.10
com.apple.driver.AppleMCCSControl          1.0.33
com.apple.GeForce          8.0.0
com.apple.driver.AppleSMCPDRC          1.0.0
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.ApplePolicyControl          3.2.6
com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
com.apple.driver.AppleIRController          320.15
com.apple.iokit.SCSITaskUserClient          3.5.1
com.apple.driver.AppleFileSystemDriver          3.0.1
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          2.2.1
com.apple.driver.AppleFWOHCI          4.9.5
com.apple.driver.AppleUSBHub          5.1.6
com.apple.driver.AirPortBrcm43224          600.36.17
com.apple.iokit.AppleYukon2          3.2.3b1
com.apple.driver.AppleAHCIPort          2.4.0
com.apple.driver.AppleIntelPIIXATA          2.5.1
com.apple.driver.AppleUSBEHCI          5.1.5
com.apple.driver.AppleUSBUHCI          5.1.5
com.apple.driver.AppleEFINVRAM          1.6.1
com.apple.driver.AppleRTC          1.5
com.apple.driver.AppleHPET          1.7
com.apple.driver.AppleACPIButtons          1.6
com.apple.driver.AppleSMBIOS          1.9
com.apple.driver.AppleACPIEC          1.6
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
com.apple.driver.AppleIntelCPUPowerManagement          196.0.0
com.apple.driver.DspFuncLib          2.3.0f2
com.apple.iokit.IOAudioFamily          1.8.9fc9
com.apple.kext.OSvKernDSPLib          1.6
com.apple.kext.triggers          1.0
com.apple.iokit.IOSerialFamily          10.0.6
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.AppleBacklightExpert          1.0.4
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.nvidia.nv50hal          8.0.0
com.apple.NVDAResman          8.0.0
com.apple.iokit.IOFireWireIP          2.2.5
com.apple.driver.AppleHDAController          2.3.0f2
com.apple.iokit.IOHDAFamily          2.3.0f2
com.apple.iokit.IOSurface          86.0.2
com.apple.iokit.IOBluetoothFamily          4.0.9f8
com.apple.driver.AppleGraphicsControl          3.2.6
com.apple.iokit.IONDRVSupport          2.3.4
com.apple.iokit.IOGraphicsFamily          2.3.4
com.apple.driver.AppleSMC          3.1.3d11
com.apple.driver.IOPlatformPluginLegacy          1.0.0
com.apple.driver.IOPlatformPluginFamily          5.2.0d16
com.apple.iokit.IOUSBHIDDriver          5.0.0
com.apple.driver.AppleUSBMergeNub          5.1.5
com.apple.driver.AppleUSBComposite          5.0.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.1
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          3.5.1
com.apple.iokit.IOFireWireFamily          4.5.5
com.apple.iokit.IOUSBUserClient          5.0.0
com.apple.iokit.IO80211Family          500.15
com.apple.iokit.IONetworkingFamily          3.0
com.apple.iokit.IOAHCIFamily          2.2.0
com.apple.iokit.IOATAFamily          2.5.1
com.apple.iokit.IOUSBFamily          5.1.6
com.apple.driver.AppleEFIRuntime          1.6.1
com.apple.iokit.IOHIDFamily          1.8.0
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          220
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.DiskImages          344
com.apple.iokit.IOStorageFamily          1.8
com.apple.driver.AppleKeyStore          28.18
com.apple.driver.AppleACPIPlatform          1.6
com.apple.iokit.IOPCIFamily          2.7
com.apple.iokit.IOACPIFamily          1.4
com.apple.kec.corecrypto          1.0
Model: iMac8,1, BootROM IM81.00C1.B00, 2 processors, Intel Core 2 Duo, 3.06 GHz, 2 GB, SMC 1.30f1
Graphics: NVIDIA GeForce 8800 GS, NVIDIA GeForce 8800 GS, PCIe, 512 MB
Memory Module: BANK 0/DIMM0, 1 GB, DDR2 SDRAM, 800 MHz, 0x2C00000000000000, 0x38485446313238363448445A2D3830304531
Memory Module: BANK 1/DIMM1, 1 GB, DDR2 SDRAM, 800 MHz, 0x2C00000000000000, 0x38485446313238363448445A2D3830304531
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8C), Broadcom BCM43xx 1.0 (5.10.131.36.16)
Bluetooth: Version 4.0.9f8 10405, 2 service, 18 devices, 1 incoming serial ports
Serial ATA Device: WDC WD5000AAKS-40YGA1, 500.11 GB
Parallel ATA Device: MATSHITADVD-R   UJ-875
USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0xfd400000 / 2
USB Device: BRCM2046 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0x1a100000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x820f, 0x1a110000 / 5
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x5d100000 / 2
USB Device: Hub in Apple Extended USB Keyboard, apple_vendor_id, 0x1002, 0x1d100000 / 2
USB Device: Trackball, 0x046d  (Logitech Inc.), 0xc404, 0x1d120000 / 4
USB Device: Apple Extended USB Keyboard, apple_vendor_id, 0x0204, 0x1d110000 / 3

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    Problem resolved. I took the machine into an authorized repair facility where, for around $30, I had it checked and the logic board replaced. Picked it up yesterday and seems to be working OK. No cost to replace the logic board even though the machine is over 3 years old. There seems  to be some sort of dispute with Apple over a class action that has worked in my favour. Great. I'm happy.
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  • Start up disc problems and my imac will not boot from the cd.

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  • IMac will not boot from Snow Leopard DVD or original Leopard disc!

    Hey,
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    - Verified the internal hard drive in Disk Utility, all ok.
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    - Changed the start up disc in System Preferences to the SL DVD, restart, it ejects.
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    - Dug out the original Leopard installation CDs.
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    - Repeated changing the start up disc in System Prefs, same story again.
    - Call Apple Support, they told me to try everything I have tried and that the DVD drive is dodgy, well it works with everyhting else! Burning and reading! I really don't want to have to go to an Apple Store- it's miles away (a costly journey) and I just do not have the time for all of this.
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    Possible scenarios:
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    4: Your trying to install 10.6 onto a PowerPC based Mac, no can do.
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  • IMac will not boot in recovery mode

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  • Mac Mini Will not boot from external drive or install disk

    Hi,
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    When i plug it into the Mac Mini and start up with Option key. It recognizes it.
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    Hi,
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  • Mid-2009 MacBook Pro sees internal SATA hard drive, but will not boot from or format

    I inherited a Mid-2009 MacBook Pro (15-inch, 2.53 GHz model) with a very strange issue.
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  • IBook G3 will not boot from CD/DVD

    Ok, I have an iBook G3.
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    Hi, and welcome to Apple Discussions.
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  • Mac Mini i7 (Mavericks) will not boot from the external drive

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  • I have a mid-2010 27" Quad Core i5 iMac running 10.8.3.  Startup disk recognizes the primary hard drive as a startup volume but will not boot from it.  Have tried zapping PRAM, ran disk utility.  No errors reported  Any thoughts?

    I have a mid-2010 27" Quad Core i5 iMac running 10.8.3.  Startup disk recognizes the primary hard drive as a startup volume but will not boot from it.  Have tried zapping PRAM, ran disk utility.  No errors reported  Any thoughts?

    My bad Eric. The startup preference recognizes the primary as a 10.8.3 startup volume but when u select it the system does not boot. I can only boot from my external backup drive

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