Samsung UN40C6300SF Service Manual

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4-74. Troubleshooting4-2-1. No Power※ Refer to the next page to check the lacation such a CN201 or IC201 SVC Manual mentioned.SymptomThe LEDs on the front panel do not work when connecting the power cord.-The SMPS relay does not work when connecting the power cord.-The units appears to be dead.-MajorcheckpointsThe IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables areimproperly connected or the Main Board or SMPS is not functioning. In this case, check the following:Check the internal cable connection status inside the unit.-Check the fuses of each part.-Check the output voltage of SMPS.-Replace the Main Board.-DiagnosticsPlease, Contact tech support.YesYesYesCheck Power of ‘T-con b’d’.- L9(T-CON) : VCC12- TP_VCC33 : VCC33Check ‘Power IC output’ ?- L201 : B3.3V- L203 : B1.8V- L204 : B1.1V- L202 : B1.2VCheck Input power of ‘T-con b’d’ ?- F1(T-CON) : B13VNoNoNoChange the T-con B’d.Change the Main Assy.Reconnect or Change.the LVDS cable.Power indicator LED is on?YesYesYesYesNo Check a connetion power code.Check the backlight on,when 18p cable unconnected ?NoChange 18p cable.Change Main Power Assy.NoCheck ‘Stand-By 5V’ ?- BD202 : A5VNoCheck ‘Main power input’ ?- BD201 : B18VS- BD208 : B13V- BD205 : B5VCaution Make sure to disconnect the power before working on the IP board.