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Hello guys i have a problem with my imac a1312 i didn’t change any hardware, my imac was full of dust and it was overheating so i just cleaned it and removed the old heat conducting material between the cpu and the aluminium thing between the fan but when i got everything in place it wasn’t booting, a small fan activity takes place every 5 seconds same as the mouse light and this keep on going like it is trying to boot. I made sure that everything is connected right the flat cables and everything. . Please help me with this problem i need my imac back :/

Thanks for the EMC # It’s a 2010 One of these: http://www.everymac.com/ultimate-mac-loo… You will need to get OWC In-line Digital Thermal Sensor for iMac 2009-2010 Hard Drive Upgrade https://eshop.macsales.com/item/OWC/DIDI… The installation videos are on the part site page.

Hey Elie Karam, You should look at all the cables, so you can be sure they are connected the right way.