Check for aliveness Rock64

[pfeerick]

Can you please paste the filename? The version in the filename would be helpful because some images are better than others.

Or at least a link to the page you downloaded it from, or details of how you access that image.

As well as:

1. What power supply are you using?
   
2. What brand / size of microSD are you using (Samsung EVO is the most compatible/reliable to date)?
   
3. What else is connected to the rock64 (other than your TV HDMI)?
   

Just so we get a better idea of what your setup so other factors can be eliminated.