9. as you boot up your computer system, nothing is displayed on the monitor. you check that the monitor is turned on and that all the power cords are plugged into a working source of electricity. what should you do next? a. ship the monitor back to the manufacturer with a written description of the problem. b. look inside the monitor case for loose or broken wires. c. check that all cables between components are securely attached. d. call an electrician.