my boot loader boasts sep 9 2020…so it just could be out of date or has become unstable…
i agree with Bryce on this issue…need to reinstall the boot loader…
you casn write into the loader file before you flash it i have re-flashed mine using ubuntu i changed the boot order so it boots fron the usb port if it cannot find a op-sys on the usb it then looks at the sd-card
you can have a look here…
also this page may be of assistance to many users…having the fault codes…
