Yes. You need to check power-on sequence.
Also possibly the issue may be connected to the temperature.I mean there is a chance that the board starts fine only if it is warm.So please try to warm it a bit with a fan prior to cold start.
I describe a bit of a problem.
It has nothing to do with the temperature. As long as the power-on interval is short, the board can be started. Only when the first power-on or the two power-on intervals are long will fail.
You need to doublecheck the power up sequence in case of unstable boot.
Yes,I agree with Victor.
What's more,it's better to make sure the uboot is proven correct and the DDR hardware is reliable.There is a risk if the DDR is not assembled appropriately which may cause failure everytime the AP try to access to the memory and consequently the system halt.
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