Our belief: Information bridge erection, service future society; our goal: to help customers achieve more successful and exciting meetings and presentations; allow enterprises to become the audiovisual industry leader. Our commitment: to provide professional advice, pre and after-sales service; meet different customer needs to provide high-quality products; to provide a full range of audio and video solutions. 2, simply ignore it, wait for some time after shutdown and re-boot, sound problems can sometimes be resolved. You may wish to try 3, check the host and speaker connection there are no loose or broken speaker, the speaker has no power to open the best-selling brand EV speakers, speaker volume knob has not related to a minimum. 4, uninstall sound drivers pro! Buy speaker drivers it, re-install or upgrade the sound card driver. 5. Create a new user, and then log test. No 6, which is not in the BIOS settings to disable the most cattle multimedia speakers, boot time by pressing the del, go look into BIOS, set to enable. I wish you a happy, slowly look for the same reason Ceiling meeting Speakers | Speaker | Audio Equipment Co., Ltd. Wuhan from Wuhan Jiuhua video project. Video Jiuhua Wuhan Engineering Co., Ltd. (www.jowa-tech.com) strong, credible, in Wuhan of control and adjustment equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving Jiuhua Wuhan innovative ideas will lead into the brilliant video and you work for a better future!