HP Notebook - 15-f272wm (ENERGY STAR) is the model of my notebook I think. I'm not very computer smart so bear with me, the last time my laptop had been turned on was around 4 months ago. The only light I see on it ever is the charger light, either orange or solid white. When I pressed the power button, all I hear is a very quiet, slight squealing noise - it sounds higher pitched and then goes to a lower pitch. You can only hear it if you press your ear against the keyboard. No sign of fans or anything. I bought a new battery thinking it needed replaced, still nothing. I have tried EVERYTHING to try and get it to turn on, nothing works. I have watched numerous videos. Read about a million things online, nothing. It doesn't even turn on without the battery and just the charger, and I don't know what to do with it at this point. I don't have a warranty on it anymore. Please, any suggestions on what I should do?