Samsung PS51D6900DS - Faults and Corrective Actions

4.Troubleshooting
4.1.3.FaultsandCorrectiveActions
SymptomRelatedImageCausesandCountermeasures
Ablankverticalcell(block)
appearsonthescreen.
•Addressbufferdefect
•Replacethecorrespondingupper/lowerbuffers.
(E,ForG)
•COFdefect(burnt)
•Replacethemodule.
Agreenscreenappearswhen
theTVisturnedon.
•TheScaleisnotreseting.
•ReplacetheMainboard.
TheOSDboxappearsbut
thereisnotext.
•Incorrectprogramversion.
•Checktheversionofeachprogram.
•ReplacetheMainboard.
Ablankupper(orlower)
blockappearsonthescreen.
•Upper/LowerYBufferdefect
•Replacethecorrespondingupper/lowerbuffers.
Eitherthemainorsubpicture
doesnotappear.
•ReplacetheMainboard.
Averticalgreenlineappears
onthescreen.
•TheSMPSvoltageisincorrect.
•AdjusttheSMPSvoltageaccordingtothevoltage
printedonthemodulelabel.
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