Hello all, I am once again in need of some help. I have five macbooks that are all experiencing the same issue. the hard drives have been wiped (as they came from a school auction) and when I turn them on, all I get is the folder icon with a question mark. I have tried to reset the pram, but that does not help. I have tried to install a new os with the dvd disk and it acts like it wants to play it but it ejects it after about 30 seconds to a minute. I even replaced one of the drives with one off of ebay, but that did not help, it is still doing the same thing. any help is greatly appreciated. I have scoured the internet to find a solution to this, but have had no such luck. Thanks in advance.