DDJ SZ2 - No audio through speakers

Ive been having audio issues with my SZ2. While i was mixing....i moved the fader from the right deck to the left deck....but no audio was coming out the speakers. I can hear the audio through my headphones when i cue it....but not the speakers. I went back to the left deck....and the audio came back through the speakers. I checked all my connections, turn on and of my controller, switched usb ports on my laptop, and also changed usb plug, all drives were updated, and DJ Pro was up to date, and also checked my cpu usage...everything was working fine. Started mixing again....everything was ok....until it happened again....but this time it was the left deck no audio coming out the speakers. I even changed the ports from A to B on my controller....and still gave me the same issue. Not sure if its a controller issue, laptop issue, or a software issue. To rule out controller.....i was able to return it for another controller....should be getting it by Monday. My laptop specs are as follows:  

Dell Inspirion 

Windows 10

Intel Core i7 5th generation/ 2.4 ghz

12 gb ram

Hard drive: 5400 rpm, HDD, 1TB

Any help would be appreciated to see what would be the issue with the audio drops from my speakers.