Samsung PA43H4100AR - Symptom-Based Fault Finding

4.Troubleshooting
4.2.HowtoCheckFaultSymptom
4.2.1.NoPower
Symptom
•TheLEDsonThefrontpaneldonotworkwhenconnectingThepowercord.
•TheSMPSrelaydoesnotworkwhenconnectingThepowercord.
•Theunitsappearstobedead.
Majorcheckpoints
TheSMPSrelayortheLEDsonthefrontpaneldoesnotworkwhenconnectingthepowercordifthecablesareimproperly
connectedortheMainBoardorSMPSisnotfunctioning.Inthiscase,checkthefollowing:
•Checktheinternalcableconnectionstatusinsidetheunit.
•Checkthefusesofeachpart.
•ChecktheoutputvoltageofSMPS.
•ReplacetheMainBoard.
Diagnostics
PowerindicatorLEDison?CheckACpowerconnection.
AretheSMPSCN804andMainCN201connected?
ConnectthecablebetweenCN804and
CN201connector.
IstheFuse(FP801S)oftheSMPSPower
InputPartOpen?
ReplaceFuse(FP801S).
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