Model A1225 / Mid 2007 and Early 2008 / 2.4, 2.8, or 3.06 GHz Core 2 Duo processor

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iMac kernel panics normal boot, safemode or install Disk

Hi guys,

So I have a customers imac that I believe could be a video card issue but would like some more input from you guys :).

So it won't boot from the hdd in normal or safemode. But did in Single user. I did a disk repair and rebooted it didn't help. So I decided to do a Apple hardware test and nope nothing came up.

So I decided well I'll try boot into a lion USB install drive and it just hangs or kernel panics.

Luckily my college has a imac that is same year and model so I tried his install disks and still kernel panic. I have tested ram also tried know. Working ram, have tried another CPU, removed wifi, bT and even the ODD but still it KPs. So there are 2 things it could be logic or GPU? The diagnostic lights are all green on the logic board. Tomorrow I was thinking of reflowing the GPU just to see if it helps.

Now the customer is buying a new mac so in removed the hdd and have a blank drive in so I am unable to install oSX and have no idea if the installer saves crash logs?

Thanks in advance

Ben

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Sometimes, especially in overheat/stress related failure, you have to run AHT 2 or 3x in succession to stress the machine enough to get it to toss an error.

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Thanks machead3 I will do it all day tomorrow and stress it. Does AHT test the GPU?

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Ok an update have tested 2 more times and it still passes so holding down option to boot from a drive I saw the hdd I added had windows on and decided to dry boot from it and it has loaded with no GPU issues. So now I'm at a dead end :/

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Have booted lion USB installer in verbose it hangs on Yukon Ethernet and airport.

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Try this: With your friends iMac connect the two systems together via a FireWire cable then setup your system in Target disk mode. Using your friends grey install disks setup your systems HD.

Make sure your friends iMac is the same series if not you'll need to get the retail version of Mac OS to install. Double check your system on EveryMac on what OS-X it can support. If your lucky it might support Mavericks which you can down load for free via your friends system and then install on to yours via Target Mode.

If target mode doesn't work double check if you put in the correct HD in (drives SATA I/O speed). Many people try putting in a HD which is too fast for the systems SATA interface. You may need to jumper the drive down to compatibility mode SATA I/II (1.5/2.0 Gb/s).

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Hi dan I will try this on Monday, I did try booting from target disk mode from a MacBook Pro and it failed on the same thing airport section, Or will this fail anyway? I was going to try install windows 7 on the drive and get it boot amp ready and see if any hardware wasn't showing as it seems to boot fine into windows :/

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Ok i tried a Target Disk install and it failed after rebooting the system i just got another KP, have installed Windows 7 and am actually on the iMac now writing this messsage, All drivers installed ok apart from the GPU which ive tried the boot camp assistant drivers and direct from Nvidia, both install but then leave an error stating "Windows has stopped this device because it has reported problems. (Code 43)"

Any Ideas?

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Sounds like your disk is not setup correctly to run Mac OS-X or you are running to new an OS for your system: If its the disk not correctly setup - You will need to delete all of the partitions and then using the Grey CD/DVD installer disk that came with your system reset up the HD making sure the disk is setup with GUID. If on the other hand the OS you are using is not the correct version for your system you will need to get the correct version from Apple or setup an installer USB drive with a workable OS-X.

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Hi Dan, after messing around with updates and still no fix I did a reflow on the GPU and all is working now, so now all I need to so is find a cheap working one off the bay :). Thanks for the help

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