The 6 most common reasons why Pine64 won't boot

[aegrotatio]

My PINE64 boots fine but outputs a video signal on the HDMI port that won't let DVI and DisplayPort monitors work. I can ssh to it and it works fine, just no video.

I do not want to go out and buy a cheap HDMI television just to use my PINE64, but I'm certain there is a kernel setting that needs to change.

All the other Allwinner boards work fine with HDMI-to-DVI cables after changing a few settings.

Now that everyone is finally receiving their boards we'll get more and more reports of nonworking video which will force a solution.