remove carefully & re-install correctly, making sure to properly orient everything the way it is supposed to be.........DO NOT force anything, it should all just gently push/fall/click into place.......
remove carefully & re-install correctly, making sure to properly orient everything the way it is supposed to be.........DO NOT force anything, it should all just gently push/fall/click into place.......
On much closer inspection, it seems to be the fan adjacent to the heatsink.
Is there a good replacement fan for the PowerMac in question? Or a mod, like cutting away the finger guard on the fan? It seems to be a high frequency pinging sound, similar to when you flick the aluminum heatsink, or the guard around the fan with your finger.