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Samsung LED TV model UA40C6900VMXZK, Not turning ON,

Hi guys,

My samsung LED TV not turning ON, I can hear continuous clicking sound from power relay (on Power board), whenever i unplug main board from power board, clicking sound disappear, but still no light visible even from hole of backside,

NOTE- Not observed any type of over heating, bulged cap, getting stand by voltage 5V.

Power Board model - PD46AF1E_ ZSM BN44 00357A

Block Image

main board model - CN09BN9500411AL003ZCG0024 (LTF400HJO5 - LTJ400HJ05-A)

Block Image

Checked voltage from main board to power board, it's dropping

Prompt reply will be highly appreciated,

Regards

Satendra from INDIA

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thanks for reply, but still same problem

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Satendra g  disconnect the cable going from the main board to the power board. Then turn your TV on. Let us know if your backlight comes on.

TROUBLESHOOTING

No Power

SYMPTOM

The 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.

CHECK POINTS

The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are improperly 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.

Check ‘Main power input’ ? - BD1026 : B18VS_PW - BD1020: B13V - BD1023 : B5V

Check Output of ‘Stand-By Power IC’ ? - Pin#3 of IC4 : A3.3V > Change the Main Assy.

Check Input power of ‘T-con b’d’ - F1(T-CON) : B13V > Reconnect or Change the LVDS cable.

Check Power of ‘T-con b’d’. - L9(T-CON) : VCC12 - TP_VCC33 : VCC33  > Change the T-con B’d.

Block Image

If nothing else you want to consider posting some images of all of your boards. that will allow us to see what you see. use this guide iFixitでの質問に画像を追加する方法 for that

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hii, oldturkey, i disconnected cable which come from main board no light visibile at all. ??????. i attached pic of power and main board for further action. thanks

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You backlight gets the power from the power board after receiving the enable backlight signal from the main board. When you disconnect the mainboard from the power board, your backlight should come on. Since this is not happening, it is most likely that the issue is your power board. Check the fuses on your power board for continuity.

さんによる

But checked voltage from main board back to power board, it's dropping. Like 5 v then 12 V again 5V

さんによる

Satendra g where are you checking the voltage and nder waht condition. TV on/off etc.

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I m checking in ON condition, On T- board, however after removing cable of main board clicking sound disappeared, but backlight still didn't ON

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The power board is broken ,I think you can have a look this

https://www.abctay.com/vizio-dps200pp190...

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hii jesus, how can u say that, power board is fine and getting 5 V from main board, power relay continuously clicking. Thanks for reply. awaitig some more info from you.

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Satendra g さん、ありがとうございました！
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