Speakers not working after RAM Upgrade

Hi,

I have a Dell Inspiron 5567 and I recently upgraded the RAM. 

But after the installation the speakers are not working.
Headphones are working though.

I think I might have done something while I was installing the ram and then I removed the back cover again, just to see if I hadn't pulled any wires out. 
But still no luck. 

Any suggestions on how can I resolve the issue?

Regards,

Tayyab