Re: samsung un46d6000 no picture
What is the power supply board P/N? BN44-00423A?
If you at the board, there will Voltage chart printed on the board to tell you what the LED drive Voltage will be with load.
Test steps: no main board connected to the power supply board
1) Put LED connector back in place.
2) Keep Black probe on the chassis, Red probe on Top 1 +
3) Power up up the board while keeping your eyes on the mete to see how high the Voltage jumps up to before it settle down 10 seconds later, then remove power from the board.
4) Move red probe to Top 2 + and repeat step 3.
5) Do the same on Top 1 - and Top 2 -.
6) Report the results.
More likely to have open circuit in the LED string, LED strips are connected in series to form one large LED string.
Your bench power supply will not have enough Voltage to drive this large LED string.
LED tester: You can get LED tester similar to this for around $30 on EBAY.
https://www.shopjimmy.com/sid-gj2c-l...ght-tester.htm
What is the power supply board P/N? BN44-00423A?
If you at the board, there will Voltage chart printed on the board to tell you what the LED drive Voltage will be with load.
Test steps: no main board connected to the power supply board
1) Put LED connector back in place.
2) Keep Black probe on the chassis, Red probe on Top 1 +
3) Power up up the board while keeping your eyes on the mete to see how high the Voltage jumps up to before it settle down 10 seconds later, then remove power from the board.
4) Move red probe to Top 2 + and repeat step 3.
5) Do the same on Top 1 - and Top 2 -.
6) Report the results.
More likely to have open circuit in the LED string, LED strips are connected in series to form one large LED string.
Your bench power supply will not have enough Voltage to drive this large LED string.
LED tester: You can get LED tester similar to this for around $30 on EBAY.
https://www.shopjimmy.com/sid-gj2c-l...ght-tester.htm
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