A faulty laptop motherboard often has the same symptoms as other component failures. First, make sure your problem isn't just a dead battery or faulty power supply. Try plugging your laptop into an outlet with your AC adapter. If it powers up, you'll know your motherboard is likely fine and the battery is the culprit. To check if the power supply is the problem, try plugging it into another working system. If the problem persists, you'll know the power supply is at fault.