How best to handle assets in for repair and refurb replacements?

Hey all,
      I recently had an Apple Thunderbolt display fail. I placed the asset in the status "In Repair" and took it to Apple who replaced it. When I brought it back to the office, I tried to determine the best way to update the asset's information but didn't see a very clear way. I settled for changing the serial number and asset tag fields. I thought that this would be noted in the history but it wasn't.

      Question 1: Is there a better way to handle this situation?
      Question 2: If this was a laptop, would the steps be different?

      Under no circumstance would I want to delete an asset because I'd lose the history of the asset's connection to a PO.

Thanks all!