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

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Weird Display Issues - Graphics Card?

My iMac doesn't boot up completely it plays the startup sound, it takes me to a screen with lines and the apple logo then it takes me to a blue startup screen, it later takes me to a screen with blue boxes and a mouse cursor.

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For anyone who helps it is much appreciated!

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First hook it up to an external monitor. If you get the same thing you will know you have a bad GPU card. This can be replaced or reworked with a hot air work station with high expectations of a successful fix.

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How would I "rework" the graphics card?

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Hey @mayer , could you possibly bake it or use a blow dryer at the high heat setting?

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Bake it? If you have something like a $3000 dental lab porcelain oven that has an exact temperature adjustment and know the melting temperature of the solder, yes. If you don't, definitely not!

With a hot air gun you can see exactly when the solder flows and know when to take the heat off to avoid melting all the solders on the board.

A hair dryer could possibly work if you can choke down the output to about the size of a quarter.

The link about gets you a cheap solution, you can use it and then resell it on eBay and maybe it costs you $10 plus shipping.

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Hey @mayer I went ahead and used a old toaster oven (since there are toxic chemicals in the chip) and baked it at 385 degrees F for 8 min. and left it to cool for 15 min. I then put it into the iMac, reassembled it and voila it worked! After it siting in my office for about 2-3 years, I had finally brought it back from the dead. It was still on macOS 10.5.8 (aka Leopard), and I had the snow leopard disk so I installed that which gave me access to the Mac App Store to update to El Capitan. I have installed new versions of Pages, Numbers, and Keynote and Office 2016, everything works great!! I was thinking of replacing the current Airport Extreme card to a newer Broadcom chip with Bluetooth 4.0 LE capabilities and newer 802.11 Wi-Fi modes. This chip also enables Continuity, Handoff, Airdrop, etc. I wanted to ask for your opinion on which card I should get and if it's worth the time. Thank you for your time!

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So now you have the new BlueOS running. <--- thats a funny -

Did this problem suddenly crop up ?

If you leave it sitting, how long does it take to get hot ?

Your hand on the lower-right corner, you should feel the graphics card slowly heat up in 10 minutes. Does it ?

I have three of these machines, ALL have over-heated video cards.

Update (04/17/2018)

In the meantime, boot-up some friend's LINUX boot DVD. Any of the 64-bit flavors will work. Don't install it, just try it. That will tell you a lot about your problem.

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Elias S estará eternamente agradecido.
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