Laptop not switching on.

Laptop not switching on.

I shut my laptop one night and didn't open it for two days. When I did open it up, I pressed the power button and nothing happened. So far I have left the battery out for 24 hours, plugged in the laptop, then the battery, and pressed power. I have held the power switch in all increments from 3 seconds until 50 seconds. I have single, double, triple pressed the button and help while either plugging in or replacing the battery.