When i press the power button of my laptop there is a blink of light on my f12 (the one that looks like radio antenna) and then turns off and and on again and again. Nothing shows up on the screen, i have an external fan attached and whenever the laptop is on it turns on but like i said it keeps trying to reboot so it just goes on and off. The only way to stop the process was by unplugging the battery. I need a fix for this plz