When you replace the motherboard on your laptop, you will lose the asset and service tag entries, which are stored in your laptop’s bios and in the Dell Utilities. This may not seem like a problem until you have to connect to Dell’s online support to resolve an issue with your laptop. If the Dell support staff cannot confirm your service tag numbers, they will be unable to verify your warranty and may refuse to open a support ticket. Warnings Writer Bio

How to Change the Service Tag on a Dell Laptop - 15