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Samsung 75″ Class 4K UHD (2160P) Smart LED TV (UN75JU641DFXZA)

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No power is evident. Disconnected and reconnected power, without succ

Is there a means to reset the TV from what otherwise appears to be a "dead" machine?

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@esstee Do you have a multimeter?


I own a Tacklife multi function wire tracker.


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Hi @esstee

Was there a storm or a power outage at all just before the TV failed to turn on?

Disconnect the power to the TV and then remove the back cover from the TV and use your Tacklife MF tester in continuity mode and check that the fuse on the power board is OK.

Here's an image showing where it is located on the board.

Block Image

(click on image)

If the fuse is OK then unfortunately since your tester cannot check for voltage values it is hard to know whether the problem is in the power board or the mainboard.

If you happen to know someone who has a DMM (digital multimeter) that you can borrow, you can use it to measure the standby voltage on the power board. This voltage is a signal voltage that is sent from the power board to the mainboard to indicate that power is available to the TV and it is the mainboard, upon receipt of this voltage signal that turns on the red standby power LED.

Here's an image that shows the standby voltage signal reference point on the board. In the standby state it should be 8V DC

Block Image

(click on image)

Be safety aware when testing for the standby voltage as there is exposed lethal AC voltage on the power board

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Your assistance is sincerely appreciated. I will commence your protocols once I can enlist someone to help remove the unit from the wall mount.


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EssTee sera éternellement reconnaissant.
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