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

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Green lines over mac logo

I have a mid 2008 24" iMac with 2.8 MHz CPU and 4 GB of memory.

The system didn't boot this morning only going as far as the Apple logo the complete white screen. I had replaced the hard drive and tried to install 10.7.

Once it gets to the reboot the machine gets to the same place, But now I have a curser. It doesn't go any further. I noticed on the second time reloading 10.7 that the Apple logo has four green lines going across it.

All diagnostics I run show everything working normally. All four LED's are lit on the motherboard.

Any suggestions?

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Sounds like your logic board has issues. This series had problems with the North Bridge chip which is why the system appears to boot up but is unable to as the South Bridge chip and the CPU are working, hence the good diagnostic LED's.

We don't have all of the guides listed here as they are under this group: iMac Intel 24" EMC 2111 Repair

Sadly, I think its best to get a newer system (new or used) then invest anything more in this system.

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4 Comments:

Here's an intro on the way the system is built: The CPU and the motherboard

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I found a refurbed logic board for $56 with a 4 year warranty. I will let you know what I find. This is my kids machine for homework. It doesn't need to be great, just work.

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Wow! Thats cheap!

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macpalace.com

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Troy Grant will be eternally grateful.
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