How can I fix my APEX - 1130W?

My cousin gave me a APEX - 1130W because it would not load the DVD. She said it had been playing when lightning caused a power outage. There is no familiar burnt /fried electrical odor, the unit still turns off and on, door opens without a problem, screen saver functions, yes everything seems in order except the DVD will not load and after trying to load the message appears "No Disc". Any suggetions or ideas on what the problem may be and how to fix it. All help appreciated