i have a 2010 3.2 Ghz HDD imac running Sierra and a while ago i wouldnt turn on-no chime-no noise completely dead-i brought it to my local guy and he was able to re-set a kind of fuse(?) and got it running again-awhile ago i had a brown-out at my place and now the same problem-seems the imac is very sensitive to power fluctuations and is getting "tripped"-my other imac on the opposite end of the room is a 2009 and no issues at all-has anyone experienced this? was there some bug about this particular year/type? incidentally-the faulty mac was connected to a power strip before and i was advised to plug it direst into the wall, but that didnt seem to help...my computer guy said just get a new one-so ill be starting that soon unless any recommendations? thanks!