Audio system in My system is not working. What's the problem?

My system is lenovo and the audio system means speakers are not working but headphones work properly whenever i troubleshoots it says the speakers headset or head are unplugged.(Not Fixed). I installed uni blue drivers but it didn't affected. I installed realtek high audio system from lenovo website but it also didn't work. What i can do furthur? Best answer will be chosen.

Try the ON button!

At the bottom of taskbar left in the corner, right click on the Speaker button, then click sounds, Window should appear, then go to Recording and set all by default ( there's button next to Properties)
Or Right click again on the Speaker button and click on Volume control options
You will see Sound Devices, it that its unmarked, mark it then click Apply then Ok