The Service tag and Barcoded serial number are the same thing. If its blank in bios it will let you change it ONE TIME only to be something other than blank..
Thank you for the response, but I need instructions on how to edit the unselectable BIOS settings. The Asset ID an service tag are not selectable in the BIOS and there is no single key that works to make them selectable. Perhaps there is some magic key combination?
The serial number of the system is the service tag.
This is NOT related to the SLP key for windows.
There will not be any further instruction to modify this. The Service tag field is locked once a value is entered even if its wrong.