So this is really weird. Two days go my iMac was working fine. It would boot and wake from sleep with no issues. Then yesterday I put it to sleep with the keyboard command while slingbox was running (not via web but the Mac program) and it just would not wake up. I tried wired and wireless keyboards. Then I tried to just hold the power button down. Nothing. So I thought the HD died. I unplugged and plugged back in and it boots. Tried to put to sleep and wake without slingbox running and the same thing happens. I have to unplug it and then wait and then let it take forever to boot. Ive tried resetting the SMC and PRAM with no luck. At this point, I feel like I should go ahead and do a fresh install. Any other suggestions?