My X20 died during playback of a movie; the picture froze, unit stopped responding to controls. After cycling the power red LED comes on. After pressing the power button LED goes off but there is no reaction on the display nor on the screen (no HDMI signal). Device doesn't boot. Main power supply is OK (12V). Also tried to provide 12V from bench power supply - as expected no difference, I've checked the derived power supplies on the main board and all seem OK; 5V, 3.3V, 1.2V. No visual signs of any thermal damage. Were there similar failures reported before? Any pointers what else to check?