Hat geantwortet auf: Replaced Hard Drive...Fan revs up to 5500rpm stillThis is BS and I have bought my last iMac. Hard Drives are always the first thing a person will need to replace (or maybe RAM) on a computer. My 2009 iMac had hard drive failure and Apple wants $300 to put a $99 hard drive into it. They won't sell me the right one and I have purchased three now, none of which are satisfactory to my machine. I am going to take it apart and check the white dot, that is the only thing I can think might work at this point.