I've had our Roku plugged in and working for a couple of years now and the yesterday it stopped working all together. Ive tried different power adapters, power cables, HDMI cables, HDMI ports, holding down and tapping the reset button, leaving the Roku unplugged for minutes/hours -- and I'm still presented with "Check Signal Cable" on our Samsung TV. When I remove power or the HDMI cable the message on the TV changes to "No Signal". The only other feedback I'm getting is a white light on the Roku box itself when connected to power. I've tried everything I can think to try and nothing resolves the issue.