原帖由： Leonard ,
I find many mac models have conformal coating on the logic boards. This can also make unsoldering more difficult. And if you are soldering/desoldering anything attached to the ground plane, you need a soldering iron that can source a lot of heat. In summary: ground plane connected part, conformal coating, RoHS (I think most intel iMacs are RoHS compliant), means you need something more than the standard pencil type soldering iron. I use an old Weller WTCPN, which is a beast of an iron. The power supply weighs about 8 pounds.