Follow these steps to troubleshoot a malfunctioning CD/DVD burner:

1. Verify the power cord is securely plugged into the CD/DVD burner and to the power outlet.
2. Check if the CD/DVD burner is connected to the computer’s Motherboard.
3. If there is a data cable, verify it is connected to the motherboard.
4. Verify the correct drivers are installed on the computer.
5. Check if the CD or DVD drive is visible on the computer.
6. Attempt to play a CD or DVD from the CD/DVD burner and verify it functions correctly.