I have a 2009 iMac that suddenly stopped working- I went to wake it out of sleep mode, and nothing. I tried a ton of "black screen" fixes from all across Google, and some did make an Apple symbol appear and that's it, and another gave a white screen, but normally it would sound like it started up (I could hear the internal HD speed up) but nothing. I'm wondering if since I don't hear the iconic Apple start up chime that maybe it's not just the display? Does anyone else have a guess what it likely is? It's a well kept machine, and had been running on an external SSD by Firewire, but whether that's plugged in or not (along with all USB and other plugs both unplugged or plugged in) it doesn't do anything- No loading bar, no chime sound, nothing. So it makes me think it's a waste to wait for a Mini DVI adapter to arrive from Amazon (2 days out) to use with an external monitor, since it doesn't seem like it's only the built in display... Does anyone with a similar machine know what it likely might be?