Asus k55n-bh81-cb wont power on

Hello, i got this laptop and i know it works cause ive seen it on. i had it on in the car and then i turned it off. i got home and it wouldnt power on. i removed the battery and connected it to the power supply and it still wouldnt turn on. i have tried pushing the power button for anywhere from 10 seconds to 10 minutes with everything disconnected and then plugging it back in and it wont work. i know it cant be a hardware issue cause it was working just fine. i have tried everything possible that i can think of and it wont work. any ideas/ suggestions?