Maybe you have wrong uboot on emmc,,,pinebook has WRONG uboot, you want pinebookPRO
right uboot will have idbloader signature at 64 sectors, 32K,, as so
3b 8c dc fc be 9f 9d 51
take uSD card you tried to install,,,, dd if=/dev/sd of=test skip=64 count=1 (/dev/sd is whatever sd card shows up as in working computer)
then hexdump -C -n 16 test ,,, this will show if you tried to install wrong uboot (if you don't use -C the bytes will be reversed ie 8c3b ...)
if the wrong uboot is on emmc, then it must be removed/disabled, then a long press(20+s) will work
otherwise, the wrong uboot will just be loaded again
OR maybe the hardware is bad
----
also it is easy to confuse arm64 with amd64, obviously the latter is for x86 computer, well 64 bit
right uboot will have idbloader signature at 64 sectors, 32K,, as so
3b 8c dc fc be 9f 9d 51
take uSD card you tried to install,,,, dd if=/dev/sd of=test skip=64 count=1 (/dev/sd is whatever sd card shows up as in working computer)
then hexdump -C -n 16 test ,,, this will show if you tried to install wrong uboot (if you don't use -C the bytes will be reversed ie 8c3b ...)
if the wrong uboot is on emmc, then it must be removed/disabled, then a long press(20+s) will work
otherwise, the wrong uboot will just be loaded again
OR maybe the hardware is bad
----
also it is easy to confuse arm64 with amd64, obviously the latter is for x86 computer, well 64 bit
