Sally, I know exactly what you're going through. My lack of sound was the same way. I mounted my tv in my travel trailer and with the AC running, I could not hear anything on the tv with the volume at max. Since I really like the tv and did not want to return it, I decided to purchase a small 12" wide sound bar. I believe it was an Insignia that I got at Best Buy on sale. That took care of the problem and I now have plenty of volume even with the AC on.