Updating dell service tag
If you want to add your own, simply type ASSETxxx "your new tag." It will hold 9 alphanumeric characters with no spaces.The /s switch you were referring to is for your Service Tag and cannot be changed once it is set without a very good reason to change it and an Onsite Dell Technician with a special piece of software, which is not available to the public for obvious reasons.Note: Occasionally you will need to install a previous version before updating to the latest version.This info is usually found in the "Important Information" section.You can change your asset tag and owner tag all day long, however. I have installed a new LCD screen on my dell latitude cpi400xt system but now I have a weird problem.
For more information please visit Spiceworks Support.
Got a Dell Power Edge that you replaced the motherboard on, and now it doesn’t have a service tag?
It also provides the capability to update the Asset Tag field.
This tool is executed from a command prompt in the EFI Shell environment.