English-37Troubleshooting: 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 yourset and contact your local dealer.No sound or pictureNormal picture but no soundNo picture or black and white pictureSound and picture interferenceBlurred or snowy picture,distorted soundRemote control malfunctions“Check Signal Cable” message isdisplayed.On PC mode, “Not Supported Mode”message is displayed.On PC mode, horizontal or vertical barsappear to flicker, jitter or shimmer on theimage.On PC mode, screen is black andpower indicator light is steady amberor blinks every 0.5 or 1 secondsOn PC mode, image is not stable andmay appear to vibrate.On PC mode, image is not centeredon the screen.You need the Monitor driver software. Check that the mains lead has been connected to a wall socket. Check that you have pressed the Power ( ) button. Check the picture contrast and brightness settings. Check the volume. Check the volume. Check whether the MUTE button has been pressed on the remotecontrol. Adjust the color settings. Check that the broadcast system selected is correct. Try to identify the electrical appliance that is affecting the set andmove it further away. Plug your set into a different mains socket. Check the direction, location and connections of your aerial.This interference is often due to the use of an indoor aerial. Replace the remote control batteries. Clean the upper edge of the remote control (transmission window). Check the battery terminals. Check that the signal cable is firmly connected to the PC or videosources. Check that the PC or video sources are turned on. Check the maximum resolution and the frequency of the videoAdapter. Compare these values with the data in the Display Modes TimingChart. Adjust the Coarse or Fine function. The TV is using its power management system. Move the computer’s mouse or press a key on the keyboard. Check that the display resolution and frequency from yourcomputer or video board is an available mode for your set. On yourcomputer check: Control Panel, Display, Settings. If the setting is not correct, use your computer utility programme tochange the display settings.➣ Your set supports multiscan display functions within thefollowing frequency domain:Horizontal frequency: 30 ~ 85 kHzVertical frequency: 55 ~ 85 Hz Adjust the horizontal and vertical position. Download the driver from WWW pages:http://www.samsungusa.com/monitorhttp://www.samsung-monitor.com