Please check connection again. I see GND connected to pin 18 and not pin 20 and other errors.
Do you have 4.2" or 4.2"b/c ?
I modified 4.2" (monochrome) python demo code. Do not press ctrl-c main.py should be done after 35 seconds.
Do you have 4.2" or 4.2"b/c ?
I modified 4.2" (monochrome) python demo code. Do not press ctrl-c main.py should be done after 35 seconds.
I left this community in Aug 2019 due to PINE64 refusal to produce/deliver ROCK64-1G version 3 after more than one year of changing statuses to "planning", "evaluating", "releasing", "availability", "estimated availability" and finally "no schedule" 
. ROCK64 is dead platform without any advantage. Buy Raspberry PI 4 !
. ROCK64 is dead platform without any advantage. Buy Raspberry PI 4 ! 
