10-24-2019, 11:20 AM
(This post was last modified: 10-24-2019, 11:25 AM by Nikolay_Po.)
You may try to connect TTL_UART-to-USB converter to SBC UART Tx pin, it is transmitting at 1500000 Bauds and connect this converter to a notebook (or to a PC with uninterruptible supply). May be you will got some shutdown or boot messages at the moment of power loss and restart. The hardware UART Tx pin is working right from a Rockchip bootloader start, even without of a media. May be you will got some clue what is wrong.
Another cause of boot failure may be an electromagnetic interference. Particularly if your boards are connected to something else except a power supply by a long wires. Can you reproduce boot failure on your table where nothing else except eMMC flash and UART-USB converter is connected to the SBC?
Another cause of boot failure may be an electromagnetic interference. Particularly if your boards are connected to something else except a power supply by a long wires. Can you reproduce boot failure on your table where nothing else except eMMC flash and UART-USB converter is connected to the SBC?
