My laptop is not turning on.

Laptop model : AN515-58 ..My laptop had less charge so I plugged it and left. Then, when I tried to open it didn't, turn on.The blue light glows when the battery is connected. And when I press the power button thee other light glows for about 4 seconds, but the laptop doesn't turn on.The keyboard also does not light up. I searched this in the Internet but could not get an answer for this model. One of the forums said that I should unscrew the main battery and disconnected RT/BIOS battery and RAM. I Need help with this. I will appreciate your help.