Samsung UA55HU8500RXUM, UA40HU7000RXSK manual Jacks are plugged into their proper connectors

The Problem

Try this!

	If your Samsung Television is flickering or dimming sporadically, you may need
Flickering and Dimming	to disable some of the energy efficiency features. Disable Energy Saving (System
	> Eco Solution > Energy Saving) or Eco Sensor (System > Eco Solution > Eco
	Sensor).
	If the colour on your Samsung television screen is not correct or the black and
	white colours are off, run Picture Test (Support > Self Diagnosis > Picture Test).
	If the test results indicate that the problem is not caused by the TV, do the
Component	following:
Connections/Screen	●● Confirm that the TV's video input connectors are connected to the
Colour	correct external device video output connectors.
	●● Check the other connections as well. If the TV is connected to an
	external device via a component cable, confirm that the Pb, Pr, and Y
	jacks are plugged into their proper connectors.
In HDMI mode, there is	HDMI UHD Color is specific to a UHD source, and does not operate properly for
something wrong with	any other source. In this case, navigate Picture > Picture Options > HDMI UHD
the screen.	Color menu, and then set the HDMI UHD Color-enabled HDMI connector to Off.
	If the colours on your Samsung TV are correct but just a little too dark or bright,
Screen Brightness	try adjusting the following settings first.
	●● Go to the Picture menu and adjust the Contrast, Brightness,
	Sharpness, Colour, and Tint (G/R) settings.
Motion Plus/Blur	If you notice ghosting or blurring on the screen, use the Motion Plus option (Picture
	> Picture Options > Motion Plus) to resolve the issue.
	If your Samsung TV appears to turn off by itself, try disabling some of the TV's
	energy efficiency features. See if Sleep Timer (System > Time > Sleep Timer) has
Unwanted Powering	been enabled. The Sleep Timer automatically turns the TV off after a specified
Off	period of time. If the Sleep Timer has not been enabled, see if No Signal Power
	Off (System > Eco Solution > No Signal Power Off) or Auto Power Off (System >
	Eco Solution > Auto Power Off) has been enabled and disable them.
	When the TV is turned on, the remote control receiver flashes 5 times before the
	screen turns on.
	If you are having problems powering on your Samsung television, there are a
Problems Powering On	number of things to check before calling the service department. Confirm that the
	TV's power cord is connected correctly at both ends and that the remote control
	is operating normally. Make sure that the antenna cable or cable TV cable is firmly
	connected. If you have a cable/satellite box confirm that it is plugged in and
	turned on.
Unable to find a	Launch Setup (System > Setup) or Auto Tuning (Broadcasting > Auto Tuning).
	If your TV is not connected to a cable box or satellite box, run Setup (System >
Channel
	Setup) or Auto Tuning (Broadcasting > Auto Tuning).