Pinebook Pro won't turn on

[leibide]

>I did not really know what I was doing though so I failed

su
cd Downloads
ls pine*      (right place?)
xzcat  pinebookpro-debian-desktop-mrfixit-191123.img.xz |dd of=dev/emmc  bs=1M
sync
(replace emmc with right mmcblkX,,, bs large unless you want it to take forever)

edit-- personally I like LARGE uptime, 33d before reboot for kernel change
Without "good" sleep, this is not feasible.  So, I am using manjaro 19.2, updated (~6%/d)
This is on sd card, with sleep there is no card read waking, so doesn't matter card slower than emmc
Do NOT neglect to edit extlinux.conf after upgrade (manual edit to enable update-upgrade, see manjaro forums)

Thank you for your help. I entered exactly what you wrote, but changed emmc to dev/mmcblk2 in the output file. All I got was this though:
dd: unrecognized operand 'sync'
Should there be a space before the 'I' symbol (I tried both ways)?
What does xzcat do? The SD card already has an unsuccessful boot image on it and I did not format it first. I couldn't get the computer to recognize it so that I could format it. That must be where I went wrong.