How do I determine if my Wave Shield is broken

I've got a project in which I'm using an Uno with the Wave Shield. At one point the wave shield was playing the WAV file, but now it is not. I do not get any errors with uploading or running the code. I have a few Serial.println commands in place, and the one before the call to displays and the one after displays, but it doesn't play. This would lead me to believe there is something wrong with the wave shield itself, but I don't know how to troubleshoot the shield itself. Any suggestions would be greatly appreciated.