Sound problem after installing gpu

[Sayan_6]

I have
Fx6300
8gb ddr3 1600mhz
Ga78lmt-usb3
I bought this around 3 years ago recently I plugged a zotac geforce 1050ti with it. So I'm running in Windows 10 build 15063.11v1703
After installing the GPU I was running it with hdmi and the sound was working properly . But when I plugged it to the monitor which I have . I connected it with speaker with 3.5mm jack now the sound isn't working .

 

[n9neman]

Go into your playback devices and make sure the 3.5mm jack speaker is set to your default.

 

[sundevilchemist]

Select your playback device and change it to the on-board sound card.