ScreenIf there is a problem with the screen, run Picture Test (Support > Self Diagnosis > Picture Test) todiagnose the issue. If the test fails to identify a problem, there may be a problem with an externaldevice or the signal strength.There is somethingwrong with the TV. Try this!Flickering andDimmingIf your Samsung Television is flickering or dimming sporadically, you may needto disable some of the energy efficiency features. Disable Energy Saving (System> Eco Solution > Energy Saving) and/or Eco Sensor (System > Eco Solution > EcoSensor) and check again.ComponentConnections / ScreenColourIf you find that the colour on your Samsung television screen is not correct or theblack and white colours are off, run Self Diagnosis (Support > Self Diagnosis >Picture Test).If the test results are negative, check the following:Are the TV's video input connectors connected to the correct external device videooutput connectors?Check other connections as well. If the TV is connected to an external device via acomponent cable, check that the Pb, Pr, and Y jacks are plugged into their properconnectors.Screen BrightnessIf you find that the colours on your Samsung TV are correct but just a little toodark or bright, try adjusting the following settings first.Navigate to Picture and adjust Backlight / Cell Light (applicable models), Contrast,Brightness, Sharpness, Colour, Tint (G/R) and other picture quality adjustmentsettings.Motion Plus / Blur(for LED TV)If you find that there is a blur or “ghost” shadow to the images on your televisionscreen, you might be able to correct the issue using Motion Plus (Picture >Picture Options > Motion Plus).Unwanted PoweringOffIf your Samsung TV appears to turn off by itself, try disabling some of the TV'senergy efficiency features. Check if Sleep Timer (System > Time > Sleep Timer)has been enabled. Sleep Timer automatically turns off the TV to save energy aftera specified period of inactivity. If the Sleep Timer has not been enabled, see if NoSignal Power Off (System > Eco Solution > No Signal Power Off) or Auto PowerOff (System > Eco Solution > Auto Power Off) has been enabled.If your PC is connected to the TV, check your PC power settings.Make sure the AC power cord is plugged in securely to the wall outlet and the TV.When watching TV from an aerial or cable connection, the TV will turn off after10~15 minutes if there is no signal.Problems Powering OnWhen the TV is turned on, the remote control receiver flashes 5 times before thescreen turns on.If you find that you are having problems powering on your Samsung television,there are a number of things to check before calling the service department. If thepower cord is connected properly and the remote control is operating normally, theproblem might be with the aerial cable connection or the cable/satellite box notbeing turned on. Check the aerial connection or turn on the cable/satellite box.Unable to find aChannel Run Setup (System > Setup) or Auto Tuning (Broadcasting > Auto Tuning).