Wouldn't boot from SD, now won't even power on
I've had this happen a few times and every time I've solved it by holding down the "RESET" button on the back of the phone, you'll have to remove the back cover. Even when the phone shows no sign of life by holding the power button, holding the reset down for 10 seconds then using the power button has worked. Give it a try.
And to the matter of your phone not booting from the SD card, you have to remember that you need to flash the .img file and in most cases the .img file is compressed into a .img.xz file which when you flash it like that will not work. Try using xzcat and piping it into dd. As an example:
https://wiki.pine64.org/wiki/NOOB
And to the matter of your phone not booting from the SD card, you have to remember that you need to flash the .img file and in most cases the .img file is compressed into a .img.xz file which when you flash it like that will not work. Try using xzcat and piping it into dd. As an example:
Code:
xzcat 20211003-0309-postmarketOS-v21.06-phosh-10-pine64-pinephone.img.xz | sudo dd of=/dev/[SDCARD] status=progress conv=fsynchttps://wiki.pine64.org/wiki/NOOB