Bricked? Pinebook Pro using Uboot-pbp

[65a]

After your battery has charged, and your booted from SD, you can re enable and bind the emmc, so it appears/mounts in your SD boot, then try just writing the Arch img to the emmc and boot. (Be sure to read the wiki for precautions when openning the PBP and the bind commands.) You should be back up and running then!

Thanks. i will read the wiki on opening and the bind command.
crashing is learning!

I've gotten into this state previously, a serial console would help. For me, I could not boot from the SD card, because the MMC was corrupt. To solve it, you can flip the switch to turn eMMC off, and try to flip it on before the SD card's linux kernel does detection. This will boot from SD and leave the eMMC available to flash.