It's a mid 27" i5 iMac everything on the screen stays exactly the same, and the sound loops and plays back the last few seconds. My warranty is expired and there's no applestores in the province I live in. I'm at my wits end and I'm horrified my mac is broken. I did put an extra 2gb stick of ram into my machine the other week which *might* of been around when these errors started, could that be it? Is there a way to check without having to open up the bottom of my mac again? p.s. every time I hold the power button and restart my mac after it locks up like this, I notice that spotlight is always "indexing" again.