luckily your pbp isn't really bricked, and can be salvaged/restored.
when you turned off the emmc to boot from SD, did your try pressing the RESET button (28) and trying to boot from SD again?
Have you tried any other live images on your SD?
Once you do get an SD img to boot, flip the emmc switch back and run the commands in this section to bind your emmc again, and be able to edit/write to it: https://wiki.pine64.org/index.php/Pinebo...nformation
when you turned off the emmc to boot from SD, did your try pressing the RESET button (28) and trying to boot from SD again?
Have you tried any other live images on your SD?
Once you do get an SD img to boot, flip the emmc switch back and run the commands in this section to bind your emmc again, and be able to edit/write to it: https://wiki.pine64.org/index.php/Pinebo...nformation