If the motherboard is failing and must be replaced, then you can still use the OEM Windows license. All you have to do if product activation fails is to use the
activate by phone method and speak with a Microsoft activation representative and explain your situation.
Activating Windows 10 after a hardware configuration change
If you upgraded to Windows 10 using the free upgrade offer and then made significant hardware changes to your device, such as replacing the motherboard, Windows 10 might no longer be activated. For help on how to activate your device, contact
customer support.
Carey Frisch