hlw friends ! i am having this crash for a couple of days . Suddenly it shuts down during net browsing , some times when i try to on my computer it happens , i am using on board radeon 4290 graphics and with old graphics driver :3 . the power LED flashes slowly on and off at 1 second intervals. Physically disconnecting power, waiting for 10 seconds and then reconnecting the power is the only way to bring it back.