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[email protected] ohg...@gmail.com is offline
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Default Curved Samsung no pic

On Wednesday, February 17, 2021 at 3:59:00 PM UTC-5, wrote:
Hi Group, can someone help please, im working on a Samsung un55ku650dfxzaTV, that has no pic, no power standby light blinking. when testing the PS board on pins 3,5,7,9,.. i get 14v to 8v fluctuating, legend says they're supposed to 13v on all 4,.. im assuming leaky cap.. the filter caps read 395v on both,.. any help will be taken seriously,


Disconnect the power cable between the main board and the power supply. With the main disconnected, the power supply and go into free-run when AC is applied. All marked voltages should appear and the backlights should turn on. If the back lights turn on, your LEDs are OK and it's likely a bad main, but there could still be a problem on the power supply. If the back lights don't turn on and you get 300V across the 450V electrolytics near the LED connector, you've got an open LED inside the display.