He spent the next hour in a frantic loop of troubleshooting: swapping RAM sticks, checking PSU rails, and resetting the BIOS. Nothing. Finally, with a heavy sigh, he cleaned off the fresh thermal paste to reveal the laser-etched surface of the processor.
Example SN: 9C123456X800123 - Digit 1-2: Factory code - Digit 3-8: Wafer batch sequence - Digit 9: Checksum character - Digit 10-15: Die unique ID amd processor serial number lookup tool