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I have a mid 2009 27” iMac that had a dead power supply, it died back in July of 2016 and I never got it fixed because I was quoted 700+ dollars. Finally, I just ordered one from amazon and my husband put it in using the IFIXIT guides. It worked perfectly for 8 days than starting making this weird buzzing sound. The next day my power in the room went off (never happened before) and the iMac won’t turn on now -_- 2nd bad power supply? How does that happen? Was it just a bad replacement or is something in the iMac killing the power supplies? They are replacing the part but I’m scared to put in it and have something ruin it!
Hi Delila I will be glad to help you I will suggest to try a different power cord before trying another power supply. You can get it here since I didn’t find it on ifixit website http://amzn.to/2xwpgGq it can also be the ac inlet issue but follow up with me when you try a new power cord first. I will also suggest getting a surge protector outlet or a UPS specially on expensive consumer electronics.
The source of the power supply could be a factor on why it died and might have tripped your house fuse/breaker when it blew. Some suppliers recover parts for resale from discarded systems. Others offer new units. So it can be difficult knowing what you got and if the power supply was defective from the start. The fact the supplier is shipping a replacement for free is good! That means they are standing up for what they sell. When you finially open the system up do a good inspection to see what was damaged on the supply and if anything else got damaged. If you can take some good pictures and post them here for us to see if you have any question on what you see.
