Hello all, coming home from work I found a really bad surprise: I had left my iMac running as usual (today it was downloading some stuff from another local machine), and I found it in a comatose state, with the screen completely off and the front led steadily on (not blinking). After attempting to move the mouse and press some keys to revive it, I went for the harsh way and turned it off by pressing the power button for a few seconds. I tried turning it on again, but it would just go to the same state: the screen not coming up, and the led turning on and staying on, without even getting the startup chime ever. The hard drive spins and I can actually hear it doing something, and I'm not sure what's going on. I tried zapping the PRAM but I don't even get the chime and it doesn't work. I kept it disconnected from the mains for a solid hour, but nothing changed. It's a Core 2 Duo 2.16 GHz, the last white series from late 2006. Is there anything else I can try before taking it to an Apple Center? Might it be the logic board? I suppose that if it were the hard drive, it would at least boot but then show me the folder icon with the blinking question mark, am I wrong? Thank you very much in advance.