If the motherboard is contacting the case, it creates a path to floor, which kills the electric cost within the circuits. Check to make sure there are spacers separating the motherboard from the metallic of the case. Many cases could have a panel which either slides back into place or screws onto the aspect of the case. Use an antistatic wrist-strap cable to forestall electrostatic discharge which can be lethal to laptop electronics. Alternatively, touch a big metal body like a radiator to discharge your self. Cooling system — Keeps the inside of your case at a protected temperature.