You wrote:
> Is this a voltage adjustment for the CPU core ?
Yes.
During the system initialization VID is read from the processor to adjust VDD accordingly.
> Is there any problem with this adjustment failure?
When VDD is not adjusted then power consumption could be non-optimal (higher), but there could not be functional issues.
> My board is now unable to Bringing up secondary CPUs. Is it related to this ?
Not related.
