Since I had applied the latest update on Mac OS X Lion v10.7 I having a bit issue with playing sounds. I am trying to connect a second monitor with the system through hdmi port. But it is not able to produce any sound. I had tried to check the internal settings, which shows no solution. I had also tried connecting a Panasonic tv with the system, and face the same issue. The TV also does not produce any audio. What should I do to fix this problem.