Samsung PN51E490B4FXZA - Manual (Page 119)

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Self Diagnosis
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Picture Test (Yes / No) : Use to check for picture problems. Picture test
displays a high definition picture that you can examine for flaws or faults.
Yes : Select Yes if the test picture does not appear or there is noise or
distortion in the test picture. There may be a problem with the TV. Contact
Samsung’s Call Center for assistance.
No : Select No if the test picture displays properly. There may be a problem
with your external equipment. Please check your connections. If the problem
persists, refer to the external device’s user manual.