Hi guys, I've recently bought a secondhand iMac 27" 2010 (old, yes I know) but the machine performs still at its best! It's a quadcore i7 2,93GHz with a 1gb graphics card. Now, I replaced the hdd, since it was one of the faulty Seagate hdd's, with a 1 TB Western Digital Caviar Black. I'm more then happy with this drive (gets read & write around 160mb/sec). When I replaced the drive, I must have pulled to hard at something because immediately when I push the power button, the CPU fan starts spinning at full speed. I triple checked if everything was connected and there seems nothing wrong. I know that when you replace a hdd, the temp sensor disappears and your HDD-fan also spins at full speed, but this I've managed to fix through some free software. The CPU-fan still reads 0 rpm. I've did some research and found someone on macrumors-forum who has put a resistor on the CPU-fan connector, this isn't a full fix though, it just makes your CPU-fan run slower. So when a higher rpm is needed, this isn't possible. I couldn't find the link but somewhere else I've found someone who saw that when he unplugged the Power button connector, a tiny resistor had come off. Check attachment: the orange circle marks the spot (sorry for the other arrows) I've brought my beloved iMac to a computer specialist, let the resistor solder back on (new one, same kind) but without succes. Anyone had some experience with this and/or has a solution rather than buying a new logic board or iMac? Help is appreciated!