TMS320DM368: Boot Issue

Part Number: TMS320DM368


Hi Experts, 

Can you help with the inquiry below?

I assembled five DSPs, but one did not boot 1 time when I performed 20 power on/off tests.
DSPs that have not booted do not boot once out of every 20 times (aperiodically).
I replaced it with a new DSP, and it boots normally.
Is it possible to suspect a fault with the DSP's internal EDMA or DDR2 controller hardware block that doesn't boot intermittently?

Regards,

Marvin