In the past i would shut my laptop and i have it set to go into sleep mode. then i would pull out the power plug so the laptop stays cool and that i can preserve battery life for the future. Now, when i close my laptop, it would sleep like normal but the second i pull out the power supply, it turns back on when it is shut. i could tell because i had music playing when i shut it then it stopped. the second i pulled out the power supply, it turned back on. any tips on how to fix this?