I now get a loud single beep on startup of my new IMac. I put my own memory in it...OWC. The thing the Apple store said is that 1 beep on startup means the memory is not checking out and because its not Apple memory there is nothing they can do about it. In utilities, both Tech Tool and the Activity Monitor say my memory is fine. Now what do I do. Sould I just ignore the beep?...thanks.....also..could i just be holding the start button down to long...sometimes it doesnt do it is I just hold the button down 3-4 seconds