The invisible card

The Ethernet port on your motherboard has stopped working, so you moved an Ethernet PCI adapter card from another computer to your desktop PC. However, when you start your Windows operating system the PnP adapter card isn’t seen by the operating system. Which of these is the most likely cause of this issue?

CompTIA A+ 220-701: 1.9 – Adapter Cards

With adapter cards, we can customize our computers, add new capabilities, and upgrade their features. In this video, you’ll learn about adapter card architectures and the use of adapter cards to extend computer video, multimedia, I/O, and communications.