Samsung UN40C6300SF Service Manual

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4-104. Troubleshooting4-2-2. No Video (Analog PC signal)※ Refer to the next page to check the lacation such a CN201 or IC201 SVC Manual mentioned.Symptom Audio is normal but no picture is displayed on the screen.-MajorcheckpointsCheck the PC source-Check the Arsenal, Check the Valencia.-This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.-DiagnosticsPower indicator LED is off.Lamp(Backlight) on, no video ?Check the LVDS cable?Replace the T-con / LCD panel?YesYesYesYesNoNoCheck a set in the ‘Stand-by mode’or ‘DPMS mode’.Please, Contact Tech support.Input the analog PC signal properly.Check the PC source andcheck the connection of D-SUB ?NoCheck CN401, PC cable.Change the Main Assy.Check IC1101(Valencia) andIC1701(Reading).Change the Main Assy.NoNoCheck the signal appear at input of IC901 ?PC_RED : C1042PC_GREEN : C1043PC_BLUE : C1044PC_H_SYNK : C404PC_V_SYNK : C405Check the LVDS clk signal at output ofMain board.(TX1~TX4)TX1_CLK : TP1978 ~1979TX2_CLK : TP1980 ~1981TX3_CLK : TP19102 ~19103TX4_CLK : TP19104 ~1910545Caution Make sure to disconnect the power before working on the IP board.