My 2009 imac that i did a board swap with and a ssd replacment runs fine with the only exception being that the smc temp always reads 60 degrees celcius no matter what, along with the screen just going black occasionally although there are no graphics artifacts, and after a couple minites the screen resusmes as normal, my guess is that its a bad smc and a pram battery, but im not sure which chip is the smc as i have no schimatic or board view, can anyone help me with this? Thanks