After 3 years, it might need a new battery indeed, but just as well it's possible something else is wrong.
Laptop is ASUS TP300L. It wont turn on and the only light appeared was the Bulb one (battery and cylindrical shape not on). I tried resetting it by holding the power button for 20 and 60 seconds but still none. Battery is built in and can't manually remove it.
Sometimes it turns on but it takes time like hours of waiting. This time no sign. Memory is okay. Help