My iMac 27 Late’09 with the ATI Raedon HD 4850 had the typical symptoms with these bars. When I opened up the case, it was packed full of dust – probably why it overheated. Well, it finally broke down (third time’s the charm), and re-baking the card was the cure once again. It hasn’t stopped running since (it’s been almost 2 years). I also started using an external fan to help with air flow. So, I took it all apart again, re-baked the graphics card (at 400✯ this time), re-assembled the iMac, and the system booted just fine.Īt this p oint I figured the iMac was just overheating, so I installed Fan Control to boost the internal fan speed. So, that’s what I did.Īfter it cooled, I began the laborious process of putting it back together. I finally plugged it in and booted it up – to see if it was worth all that trouble.ġ9 days later, the symptoms returned.
#IMAC MID 2010 GRAPHICS CARD REPLACEMENT HOW TO#
The first step was to dismantle the iMac and get the graphics c ard out. Luckily, there are some good online resources that show how to do that.Įventually I got the graphics card out and onto a baking sheet – it was ready.įrom what I read, it should bake for 10 min. Since I had nothing else to lose, I decided to give it a try. Baking it in the oven should re-melt the solder back together and fix the problem. The theory is that over time, the solder (metallic stuff that holds the connections together) gets weak and eventually separates a little – causing the graphics card to fail. Then, by some strange circumstance, I happened to be reading about people who baked their graphics cards in the oven and brought them back to life. That was more than I wanted to spend, so I just left the thing sitting in it’s box. It was going to cost $500 to replace the card. There were some strange vertical green lines on the screen and it froze on boot.
I got an iMac in 2008 with a Nvidia GeForce 8800 GS graphics card. After about 2 years, the computer crashed.
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