Samsung UA40D6600WM problems, signal strength, External Speaker or the sound is muted by pressing the MUTE button

●●	Sound Test (Yes / No): Use the built-in melody sound to check for sound
	problems.
	NN If you hear no sound from the TV’s speakers, before performing the sound
	test, make sure Speaker Select is set to TV Speaker in the Sound menu.
	NN The melody will be heard during the test even if Speaker Select is set to
	External Speaker or the sound is muted by pressing the MUTE button.
●●	Signal Information: (digital channels only) HDTV channel’s reception quality is
◀	either perfect or the channels are unavailable. Adjust your antenna to increase	▶
	signal strength.

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