Please, I need help, my probook laptop cannot come on when I press the power button. It only comes on and goes off in less than 6 seconds when I insert the the battery charger. I have tried to reset the laptop by holding the power button for 15 seconds to 1 minute without the battery yet is not working. I have also removed the battery and RAM and hold the power button for 5 minutes, is not working. What will I do?