Pinebook Pro dead after updating u-boot

[Arwen]

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Did I brick my device? is it possible for me to fix it in any way other than full re-install of the OS?
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No, you did not brick your Pinebook Pro. Worse case, it's soft bricked.
Yes, it's possible to fix without re-installing.

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Do I need to connect it to UART maybe to see what the error message is?

Maybe.

First, try:

• Power off your Pinebook Pro
  
• Create an OS on a MicroSD card
  
• Insert into your Pinebook Pro and power on the Pinebook Pro
  

If that works, you can "fix" you eMMC's U-Boot. (The exact fix is another problem... I have clear, concise backups, so easy for me...)

If that does not work, then you may have soft bricked it. That fix is more complicated. We do not have straight forward instructions on the Wiki yet. Basically you have to open the bottom, (carefully), and disable your eMMC. Boot off a MicroSD card and then re-enable your eMMC, (this is a 2 step process, power on the eMMC and make the OS see it as step 2). Whence that is done, you can fix your eMMC's U-Boot.

Sorry I can't walk you through the second fix. I'll see if I can get time this weekend to write up a Wiki page on that fix. We have a few people who have done so via various forum posts, but I don't have them handy.