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Hello, I'm Shahid and will be happy to assist you.
Can you please check Vs and Va volts on CN804 connector of power supply board with multimeter (DMM) at pin-1 for Vs and pin-4 for Va?
OK, no problem.
Vs volts seems OK but Va isn't as it should be approx 70V DC.
Do you get 15V at pin-6, 5.3V at pin-7 of same connector?
OK, please check attached picture link to view power supply board image where CN804 is marked, zoom the picture to get better view of connector and volts table.
Now unplug CN4008 from z-sus (Samsung calls it X-Main) board and again check Va and Vs volts, if you get same readings then power supply board seems defective.
If Va volts increases (approx 70V) then x-main and y-main boards are suspected and swapping the boards will help to resolve the problem. I trust my input will help you out. Please feel free to respond if you have any additional questions.
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I understand, power board image is just to make sure we are on right track in troubleshooting.
Please feel free to respond if you have any additional questions.
OK, please swap power supply board in TV at this point to see if it resolve the problem or x-main and y-main boards are also defective, I'm sorry about this news, this TV has bit complicated circuitry and one or more boards can go bad.
if ebay supplier gives warranty of board then it would be fine, shopjimmy is out of stock for power board, however, please contact if they can provide one to you.
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