Laptop help needed?

My laptop is dead, no lights, no fans, the power supply is fine (tested) . . . . does this mean a new motherboard?. . . what else could it be?
Answer
Are you sure the power supply is nice?have you checked the power connector cable that connects from power supply to motherboard?sounds like its a power issue. if the motherboard was fried you would at least get a light on or a noise. i would check all connections.