I’ tried to bot from a prepared SD card following the flashing instructions (section 6.3 of the manual) with the ix8mp image to no avail sadly.
I have to correct something, the OLED menu isn’t behaving normally as I said yesterday, but is displaying only for a while and when I want to browse the menu for more than a few seconds (around 3 to 4s) it shut itself abruptly like it isn’t powered anymore. Then I’m not able to make it appear again with Hyper+Enter, I have to wait ~2 seconds to be able to do so. My conjecture could very well be wrong but it’s behaving as it was powered from a capacitor which would discharge fast and would make ~2s to be charged up again.
Also the red LED (D10) on the motherboard isn’t lit up constantly but is blinking like this : ON for 2s, OFF for 26s, ON for 2s, OFF for 26s, etc… (28s cycle running endlessly). I didn’t find any table with blinking patterns in the manual so I’m not sure if it’s an (undocumented) error code (if it is then some documentation added to the advanced topics section in the manual would be a good idea) or a very regular electronic glitch.
FWIW I’m using a brand new USB-C 100W-rated Anker cable and 100W GaN charger.
I’m not sure what I should see on the UART (UART2 as it’s a IMX8MP) but I’ll try in a few hours and report here if there something in the logs. Maybe the bootloader is corrupted? If so I’ve yet to read the instructions to flash another copy of it.