TroubleshootingFor the sake of time and cost, it is strongly recommended that you check outthe problem by yourself according to the instructions listed hereunder beforecontacting the after-sales service for technical assistance.Note: Production of the screen requires high and precision technologies. However,there might be some dark or bright (red, blue or green) spots, or some anomalistic stripes orspots. This is not defect. If the TV set is used in an area 2,400 meters above the sea level wherethe air pressure is below 750hpa, the picture on the screen may be affected and a muffled soundmight be produced. These phenomena might happen in the area 1,500 meters above the sealevel. This is resulted from difference between air pressures inside and outside the display. Thisis not a defect covered by the limited warranty.NOTE: Design and specifications are subject to change without notice.The dimension in this manual is a approximation.Note: Do not leave the television with static picture in an extended period as it may result inresidual image on your television 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 TV/AV 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 Search.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.