Samsung UN40C6300SF Service Manual

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4-134. Troubleshooting4-2-3. No Video (HDMI 1, 2, 3, 4 - Digital 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 HDMI source.-Check the HDMI switch, 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?YesYesYesYesYesNoNoCheck a set in the ‘Stand-by mode’.Please, Contact Tech support.Input the HDMI signal properly.Check the HDMI source andcheck the connection of HDMI cable ?NoCheck CN601~4.Check HDMI cable.Change the Main Assy.Check IC1401(HDMI switch).Change the Main Assy.Check IC1101(Valencia) andIC1701(Reading).Change the Main Assy.NoNoNoCheck the signal at Input of Main board ?HDMI1 Clk : Pin #1,#2 of D614DATA : Pin #3, #4 of D614HDMI2 Clk : Pin #1,#2 of D611DATA : Pin #3, #4 of D611HDMI3 Clk : Pin #1,#2 of D613DATA : Pin #3, #4 of D613HDMI4 Clk : Pin #1,#2 of D604DATA : Pin #3, #4 of D604Check the signal at Output of ‘HDMI switchIC’ ?HDMI RX_Clk : Pin#62~63 of IC601RX_Data : Pin#56~61 of IC601Check the LVDS clk signalat output of Main board.(TX1~TX4)TX1_CLK : TP1978 ~1979TX2_CLK : TP1980 ~1981TX3_CLK : TP19102 ~19103TX4_CLK : TP19104 ~19105665Caution Make sure to disconnect the power before working on the IP board.