My Laptop right speaker is not working properly, what should i do?

My Laptop right speaker is not working properly, what should i do?

Added (1). My laptop is lenovo ideapad s410p (non touch screen) running win 10 x64
at night when i use this laptop suddenly its MUTED. Both left and right internal speaker, then i restared, thing seem to be fine again. Then the morning i use it and its all muted again, restared several times, but only get the left speaker back to normal, the other one just very small and high pitch volume
so any guide in the internet that i can do myself to fix? Or i need to go to store fixing dis frickin laptop?

:<