I have had two boards where the IMX6 fails to start. We have about 30 prototype boards total. The two that failed have been working and starting up correctly for a few months.
The startup signals (PWRON_ POR_B, etc...) seem to be working normally.
The 26MHz clock is present.
All power rails are good.
On power up the processor appears dead and no DRAM clock is started.
Is it possible to determine why the processor failed?