07-08-2021, 08:21 PM
The PBP will not boot from a USB port. The power light is driven by software, likely whatever if on your eMMC. A serial console would help you see what's going on at that point. But again, you cannot boot from USB, only micro SD or the eMMC. (Or SPI flash ROM, and then some other source, but we'll not involve that for now.)
:wq
[ SRA accepts you ]
[ SRA accepts you ]