stm32pm1 power failure

[Ara.1]

Strange issue

used power supply 24v, 5A

If we connect debug 3.5 MM cable on debug port, then only unit boots up and taking to kernel command line prompt else it does not boot up

I tried taking out LCD display , USB, battery, still above issue there

its a customized board,

help me to diagnose

[PatrickF]

Hello,

as it is custom board, we need more information to help you. I think you already done some investigation and results. We could answer only to precise questions on a specific STM32MP1 behavior.

Regards.

[Ara.1]

its a junk character received , when physical debug cable,

i bypass this scenario in uboot , now working