Our team is using STM32F103R8T6 and STM32F405R8T6 for a robot and for some reason sometimes when we turn the power on (from battery or a DC power Supply) the MCUs short from the inside and when we change the header board for the MCUs which we designed ourselves, everything is fine.
we have also used coupling capacitors as recommended in STM32 datasheets.
What do you suggest? is there anything we have missed?
if anymore information is needed, i'd be happy to provide.