The T520 does not have audio after resuming from sleep / hibernate mode.
Soundcard: Conexant 20672 SmartAudio HD
Soundcard drivers version: 8.32.18.0
Ran ThinkVantage System Update and Windows update however issue still persist.
Update the audio driver to latest driver 8.32.23.0 and above.
ThinkPad T520-speakers pop then silent, no audio. I have tried the solutions suggested. I also verified that I have the latest audio driver. Other suggestions appreciated.