Hi, First of all I would check they are both connected. However it's quite unlikely they've managed to both disconnect themselves at the same time.
Assuming they are both connected ok I would first remove one or the other, then enter your BIOS to see whether the remaining device is detected. As these devices will often be run by the same controller, if one is faulty it could cause the controller problems and in turn it would fail to detect the healthy device. If you can now see the remaining device in the BIOS you can be left almost certain that the removed component is at fault.
Should the BIOS still fail to detect anything this could indicate a controller failure on the mainboard. To help confirm this I would try and connect a drive or ROM that you know is healthy and see if they detect in the BIOS. Another way to help confirm this would be to boot from a USB device into some kind of OS (Windows, Ubuntu etc) and see if the controller is detected by the OS. If it doesn't detect the controller this would be further evidence it has failed.

In a situation where the controller has failed it is often best to pursue replacing the mainboard in the laptop. However it can often be more economical to replace the entire machine.