Thanks for posting. Sorry you're having issues with your SR16.
Make sure you're using the correct power supply. If you're in the US, you should be using a 9V AC 830MA power supply.
If you can confirm you're using the correct power supply, let's have you try performing a factory reset and assigning your outputs. To reset your SR16 back to factory settings, power on while holding down [ERASE] and [PLAY] for 3 seconds. All existing Patterns, Songs, and drum assignments will be lost.
Follow the steps below to choose your output jacks on the SR16.
I've followed the instructions in the manual on how to create a song, when I created it I pressed play, and there was no sound, I can see the sequence that I've created in the display screen running through the program but no sound comes out.