Unisen LT-52249, LT-52153, LT-40153, LT-46249 manual Picture Symptom Remarks, Sound Symptom Remarks

Appendices 85

Appendix E: Troubleshooting, continued

Picture

	Symptom	Remarks
1.	Picture does not look like a high-definition	Not all signals are high-definition signals. To receive high-defini-
	picture.	tion programming from your cable or satellite provider, you must
		subscribe to the provider’s high-definition service. Some over-
		the-air broadcasts are in high-definition and can be received with
		a high-quality antenna suited to your location.
2.	TV has sound but no picture.	• Check that all video inputs are plugged in firmly.
		• Press and hold the POWER button on the control panel for
		ten seconds to perform System Reset.
3.	Picture has become dimmer.	Adjust picture brightness and contrast to maximum levels.
4.	There is a large black or gray rectangle on	The TV’s analog closed captioning has been set to “text” mode
	the screen.	in the Captions menu. Turn off because there is no text informa-
		tion being broadcast.
5.	You cannot view a picture when playing a	Check your VCR’s owner’s guide for further troubleshooting.
	VHS tape.
6.	VCR or DVD player’s on-screen menus jitter	Stop playback. Possible cause: Many VCRs and DVD players
	up and down.	provide on-screen menus at only half-resolution that may
		appear to jitter up and down.
7.	When viewing a stopped VCR, white lines	• Turn off video mute for the VCR.
	are rolling on the screen.	• Begin playing the tape.
		• Change the VCR input from Line 1 to the VCR antenna input.
8.	A color program appears as a black and	The PerfectColor color balance has been incorrectly set. Reset
	white image, or the colors are dim, or the	the PerfectColor balance.
	screen is black.
9.	Picture from an HDMI input is noisy (poor	Upgrade a Category 1 (unmarked) HDMI cable to a Category 2
	quality).	high-speed HDMI cable.
10.	The image from a computer appears dis-	• Normal TV operation. The TV does not correct distortion in
	torted when viewed on the TV.	the picture from a computer because the correction process
		may cut off the edges of the image.
		• The aspect ratio may be wrong for the image. Press MORE
		and then 0 (FORMAT) to change.

Sound

	Symptom	Remarks
1.	There is no sound even when the	• Check if the MUTE key is on.
	volume is turned up.	• The TV’s “Listen to:” setting may be set to SAP (analog program
		from the ANT input) but no SAP is being broadcast.
		• Check that the Speakers option is set to TV to hear sound from
		the TV speakers. Possibly sound is being sent to one of the audio
		outputs for an A/V receiver or headphones.
		• If using an A/V receiver, check that the Speakers option is set to AV
		Receiver to hear sound from the A/V receiver speakers.
		• Press and hold the POWER button on the control panel for 10
		seconds to perform System Reset.

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