SAMSUNG PL42A4501XZD PL-50A450P1XZDTROUBLESHOOTING

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                                          [2]
NO PICTURE _ AUDIO IS NORMAL
Symptom:  Audio is normal, but there is no picture displayed.
Major checklist:  This may happen when the Main Board is functioning, but the X, Y Main Board, or Y Buffer Boards are not.
-- The output voltage of the Main SMPS.
-- This may happen when the LVDS cable connecting the Main Board and Logic Board is disconnected.
NB:  When separating and connecting the cables such as CN810, CN809, CN808, CN807 of the Main SMPS, CN4701 of the X-Main Board, and CN5707 of the Y-Main board, a 'spark' may be generated by the electric charge of the high-capacity capacitor.  Therefore, wait some time after disconnecting the Power Cord from the unit.

VIDEO IS NORMAL, BUT NO SOUND
Symptom:  Video is displayed well, but there is no audio [sound].
Major checkpoints:  When the speaker connectors are disconnected of damaged.
                                   When the sound processing part of the main board is not functioning.
                                   Speaker defect.

NO VIDEO
Symptom:  A normal / cable network analog broadcast screen  is blank or abnormal, but OSD is OK.
Major Checklist:  Check the antenna connection settings [Air: NTSC | ATSC, Cable: NTSC]
                               -- Check the Power Input of the Main Board.
                               -- Check CVBS cable connection.

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