Hisense 75rge1 led output voltage

[Tech1212]

This hisense is not putting out the 98 volts x 4 that its supposed to. Its putting out 35.1, 35.3,29 and 31 volts. I dont have capacitor tester. I do have a klien mm600 multimeter and a led tester.
TIA
All the leds appear to function.

Can I get guidance on what components to test in regards to this low voltage issue ?

[Tech1212]

Re: Hisense 75rge1 led output voltage

Today the voltages are even lower , about 17 volts x 4

[Tech1212]

Re: Hisense 75rge1 led output voltage

Can any help me?

[petax]

Re: Hisense 75rge1 led output voltage

Can any help me?

It seems like the problem is on the power supply.

With everything plugged in you could measure voltage between GND and B ON. Be careful with the power supply so you don't get an electric schock! I'm not 100 % sure but the B ON should be the control voltage from the main board to activate the backlight. If you don't have any voltage there I would suspect the problem is on the main board(if the main board is supplied with standby power). If there is a few volts at B ON the problem is probably on the power supply.

You should also give us high resolution images of the boards

[R_J]

Re: Hisense 75rge1 led output voltage

You likely have bad backlights, You can connect your meter to the backlight connector, then turn on the power and see if the voltage goes up, and then drops. This is due to the bad backlights and the power supply going into protection. (led boost voltage is shutting down)