n_bhagat, Thank you for posting in the Intel® Communities Support.
In reference to your inquiry about the "Intel® Optane Memory Pinning" error message, we recommend to follow the instructions provided in the link below to try to fix this issue:
But, in this scenario, since the computer is not booting, the best thing to do will be to get in contact directly with Dell for further assistance on this matter and if necessary for them to provide their warranty options. If the laptop boots again, then you can try the steps provided in the link above:
Any questions, please let me know.
Intel Customer Support Technician
A Contingent Worker at Intel