Boots and runs just fine, however the Linux Mate is a little heavy, runs slow, bogs down etc. I wanted to try a lighter O.S. I have three SD cards, used three installer types including the Etcher remix made for Pine64. Once I install the image on the SD card/s it will not boot. The power button symbol just flashes until I remove the card, then it continues to boot just fine into Mate. I have used all three of these sd cards to boot a live image of the android-for-pine but that too was sluggish and unresponsive.
TL;DR SDCards I have worked previously, they do not work when I image DietPi.
Is there a preboot screen, verbose, or a bios type screen to monitor the boot process?
This unit came pre-flashed from the factory.
If you are running the stock Ubuntu Mate image that came with the pinebook, you'll find it both slower than the current ayufan builds (plus all the inevitable bug fixes and tweaks that have come over time).
You will find android quite slow on the pinebook via microSD card unless you use a card with good random I/O performance. I would recommend that if you intend to be booting from the SD for stuff, that you get yourself a could of Samsung EVO cards... they have the best random I/O performance and have proven to be very reliable. The best setup if you want to be able to use android AND linux is to install android to your eMMC as that will give Android the best performance, and then use Linux from your microSD.
Unfortunately there is no BIOS/preboot screens. If you get a USB to serial adapter though, you could enable the serial UART on the headphones jack, and see what is going on, but I can almost guarantee that if you try a different card type you won't have any issues (since you've used Etcher and corrupt or faulty microSDs shouldn't be an issue).
I believe there may be an issue with 64GB+ cards (as they going into the XC class), but I need to find out more about that.
Not aware that Armbian has released a build for Pinebook, download now.
"Did you make sure that you choose pinebook from the drop-down menu at the top?"
I did not. I have no excuse.
Pressing on.