I recently purchased a new Inspiron 530 system with the WL 5.1 Surround Sound Speaker System.  Can anyone offer me any tips on getting the rear speaker to stop going out after about 20 minutes?  When I first turn on the speakers, the rear speaker will start out working just fine.  However, after the initial 20 minute time frame it will start making popping noises, then it will develop static, and finally it will stop playing music and go into searching mode, which of course it never picks up the signal again, so it goes into sleeping mode.  Someone, please help.  This is getting very frustrating and upsetting considering the price.