I just purchased this C600 a month ago, used. I love it and all was great and then... last night I was cruising the net and the darn thing just blinked and was gone. It was like "boop" and off it went. No warning, nothing. Now when I try to power it back on I get absolutely nothing, regardless if I'm try to run off the battery or plugged in - no lights, no sounds, so action. Nothing. Any suggestions as to what's going on? Help??