How To Change Serial Number In Bios Settings After Replacing A Motherboard Hp El

NOTE: After Replacing the Motherboard
If present, insert the modem port cover into the modem port opening. Afterwards, you must use
the Service Utility floppy disk to store the system data and display information in the EEPROM on
the new motherboard. To do so:
1. Plug in an AC adapter.
2. Insert the Service Utilities floppy disk in the floppy drive.
3. Turn on the notebook.
4. If you hear 5 beeps, press F1 to update the display data stored on the motherboard. Let the
notebook reboot, and then go to the next step.
5. Select the Serial Number option from the boot menu.
6. If you successfully stored system data on the floppy disk before removing the old motherboard,
type A for the automatic update. This restores the old system data on the new motherboard.
If you did not store system data, type M for the manual update option. Enter the serial number from the
bottom of the notebook—you might have to contact an HP support center to do this.

https://www.hpe.com/us/en/servers/server-operating-systems.html

If your laptop does not have a floppy refer to the specific manual for using a USB stick to run the app.