My laptop not power on

Hello, My MacBook stopped working after setting in my backpack for a few months. When I plug the charger with the battery connected or disconnect I get a green light than orange. When the plunge the battery the fan starts cycling on and off and If I the battery disconnect the fan won't run. I bypass SMC the laptop will run with the fan full speed but not detect my SSD. I have already rest SMC and NVRAM with no luck. Can anyone help me where do I start to diagnose? I'm really sorry for my bad English.