Samsung PN51E490B4FXZA - Manual (Page 175)

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Troubleshooting
If the TV seems to have a problem, first review this list of problems and solutions.
If none of these troubleshooting tips apply, visit samsung.com, then click on
Support, or call Samsung customer service at 1-800-SAMSUNG.
Issues Solutions and Explanations
Poor picture First, perform the Picture Test and to see if your TV is properly
displaying the test image.
• Go to MENU - Support - Self Diagnosis - Picture Test
If the test image is properly displayed, the poor picture may be caused
by the source or signal.
Other Information