TroubleshootingFor the sake of time and cost, it is strongly recommended that you check out the problem by yourself accordingto the instructions listed hereunder before contacting the after-sales service for technical assistance.Note: Production of the plasma screen requires high and precision technologies. However, there might be some dark or bright (red, blue or green) spots, orsome anomalistic stripes or spots. This is not defect. If the TV set is used in an area 2,400 meters above the sea level where the air pressure is below 750hpa,the picture on the plasma screen may be affected and a muffled sound might be produced. These phenomena might happen in the area 1,500 meters abovethe sea level. This is resulted from difference between air pressures inside and outside the display. This is not a defect covered by the limited warranty.Note: Do not leave the television with static picture in an extended period as it may result in residual image on yourtelevision screen.Horizontal/vertical barsor picture shakingCheck for local interference such as an electricalappliance or power tool.No picture, no soundVerify if the television is properly plugged.Verify if the television is properly supplied power.Verify if electricity is available.Blank screenVerify if correct signals are input.Press INPUT button to change signal input to TV input.Restart the television of power supply is interrupted.No soundPress Mute button and verify if Mute mode is set.Switch to other channel and verify if the same problemhappens.Press VOL+ button to see if the problem can be solved.Poor sound Verify if sound system is correct. Refer to some chapterfor adjust.No picture in somechannelVerify if correct channel is selected.Adjust the antenna.Make adjustments by Fine Tune and Manual Scan.No color for somechannel program(black and white)Verify if the same problem exists in other channels.Check out of picture and sound systems.Refer to relative instructions in the Manual for coloradjust.Spots with some orall picturesVerify if the antenna is correctly connected.Verify if the antenna is in good condition.Make fine adjustment of channel.Television out of controlDisconnect the television from power supply and, 10seconds later, connect the television to the power supply.If the problem still exists, contact authorized after-salesservice for technical assistance.Troubleshooting46 TFT-LCD TV