English - 29AppendixAutomatic Degaussing to Remove Colour PatchesA degaussing coil is mounted around the picture tube, so you do not normally need to degauss the television manually.If you move the television to a different position and colour patches appear on the screen, you must:◆ Switch the television off by pressing the “ ” button (On/Off) on the television◆ Unplug the television from the wall socket◆ Leave the television power-off for about 30 minutes so that the automatic degauss function can be activated,and then press the “POWER ” button on the remote control.☛ If your television will be left unattended, press the “ ” button (On/Off) to turn your television off.Troubleshooting: Before Contacting Service PersonnelBefore contacting Samsung after-sales service, perform the following simple checks.If you cannot solve the problem using the instructions below, note the model and serial number of the television and contact yourlocal dealer.No sound or picture ◆ Check that the mains lead has been connected to a wall socket.◆ Check that you have pressed the “ ” button (On/Off ) and the POWER button.◆ Check the picture contrast and brightness settings.◆ Check the volume.Normal picture but no sound ◆ Check the volume.◆ Check whether the volume MUTE ( ) button on the remote control has beenpressed.No picture or black and white picture ◆ Adjust the colour settings.◆ Check that the broadcast system selected is correct.Sound and picture interference ◆ Try to identify the electrical appliance that is affecting the television, thenmove it further away.◆ Plug your television into a different mains socket.Blurred or snowy picture, distorted sound ◆ Check the direction, location and connections of your aerial.This interference often occurs due to the use of an indoor aerial.Remote control malfunctions ◆ Replace the remote control batteries.◆ Clean the upper edge of the remote control (transmission window).◆ Check the battery terminals.