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Disclaimer: Boring Video.
I received this error recently on my dell laptop.
HEADLESS OPERATION ACTIVE
Alert! TPM device is not detected.
It would not allow me to boot into the windows 10 OS.
1. I tried this:
www.dell.com/support/kbdoc/en...
2. I read this...
www.dell.com/support/kbdoc/en...
3. Finally, in part of this forum, it mentions removing the power and waiting 30 seconds. This worked for me:
www.dell.com/community/XPS/XP...
Good luck. I'm not sure what solution will work for you.. but I hope you don't run into this error.