Please make sure all cables have been connected firmly and correctly. Also go to “Device Manager” if a yellow question mark appears like the below diagram, it means your motherboard’s driver is not up-to-date, please download the latest driver from your motherboard’s manufacturer website to solve this problem.
Start → Control Panel → Device Manager→ Under View select Device by connection → PCI bus
Under PCI bus, there will by multiple PCI standard PCI to PCI bridge devices.
Click open the available options until the device appears like the attached diagram