1． Volume can't adjust
1) Check whether the volume control button of the remote control works normally.
2) Check whether the volume control button on the TV works normally.
3) Make a factory reset to see if it is restored or get your TV service
2．Serious distortion of sound or intermittent sound
1) If the current signal source is USB, please confirm whether there is a similar problem when playing the corresponding multimedia file(s) on the PC. If yes, the problem is due to the multimedia file(s); otherwise, please contact the service center directly
2) If the current signal source is TV, please confirm whether there is a similar problem when playing other programs. If there is no any problem, this problem is due to the programs.
3) Please call service center when your TV not ok after above operation.
3． No sound connected with PC
1) Check whether connect the audio cable from PC, as VGA cable only carries video and picture information, no audio information.
2) Check whether you select “PC” using the source button on you remote control, or you can connect your TV using a HDMI cable if you PC has a HDMI connectors, as HDMI can transport digital video and digital audio together.