Have Acer 5740 laptop with 25" I-Inc external monitor. My Bose external speakers will not work while the HDMI cable is connected to the laptop - the monitor takes over and plays sound through its little speakers. I need to use the monitor as a display and the Bose speakers for sound. Can I disable the sound going to the monitor so the external speakers will work? If so, can you tell me how? Monitor had line in but not line out. Laptop has earphone jack for line out.