Nothing but red light.

[frewind]

I flashed several images, and Phoenix Card always displayed the magic was performed and everything checked out OK. No errors.

Then I'm running out of ideas. Except the hardcore developer stuff (see http://linux-sunxi.org/Pine64) like powering through Euler connector, measuring consumption while trying to boot, measuring voltages on the RPi connector, using a serial console to see whether the device got stuck in u-boot, trying out a Linux image and see if the router assigned a DHCP lease with connected Ethernet...

But i don't recommend all of the above since that's nothing normal users shoud have to deal with. I hope the Pine64 folks will use a 2nd LED on their next board revision that can be used for user interaction (indicating power problems, DOA, successful boot stages and so on)

IIRC someone reported that his Pine64 only negotiates a display signal with one out of four displays he has. That's one of the reasons I would try to not use an Android image for DOA detection (since this might happily boot to the desktop but you never realize)

I've figured out through trying to get one of my monitors to work with the P64 via HDMI/DVI, that the Ubuntu image will boot without a HDMI cable plugged in. If you can use an Image writer to load your card (not Phoenix Card as it's told me it's work previously and nothing was written to the card) then power up with just an Ethernet cable plugged in then you should get flashing Ethernet LED's in about 30 seconds