I hear noise in all the channels
When you hear noise while watching TV, you can have a Sound Test to seeif the test sound is played clearly.
If there is no noise during the Sound Test, it may be due to poorreception on the TV or poor connection of
peripheral (set-top box, game console, DVD, bluerayplayer, or PC). You are suggested to check the connection.
If there is noise on a particularchannel, it is caused by unstable reception so you are suggested to have aninspection by the broadcaster you are subscribing.
Smart TV ‘12~’13
[Smart] or[SettingMenu] → [Setting] → [Support] → [Sound Test]
webOS TVafter ‘14
[HOME] →[SETTINGS]→ [ADVANCED SETTINGS] → [SOUND] → [Sound Test]