Disconnect the cable between the power board and the mainboard.
Reconnect the power to the TV.
The TV screen backlights should turn on full and stay on. There will be no picture because the mainboard is disconnected.
''If the backlights don’t stay on or they blink'' then there is a problem with the power board or the LED array.
Disconnect the power from the TV and then disconnect the LED power cable from the power board. Reconnect the power to the TV and then check the voltage at the power board’s LED power cable connector. It should measure ~ 250 - 280V DC or maybe even as high as 300V DC If it is not that high or is pulsing it is a power board problem. If it is steady it is a LED array problem.
''If the backlights stay on,'' check the voltages at the power board’s mainboard cable connector and see if they are as per what is marked on the power board near the connector. If they are as marked and also steady then it is a mainboard problem
Disconnect the cable between the power board and the mainboard.
Reconnect the power to the TV.
The TV screen backlights should turn on full and stay on. There will be no picture because the mainboard is disconnected.
''If the backlights don’t stay on or they blink'' then there is a problem with the power board or the LED array.
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Disconnect the power from the TV and then disconnect the LED power cable from the power board. Reconnect the power to the TV and then check the voltage at the power board’s LED power cable connector. It should measure ~ 250 - 280V DC. If it is not that high or is pulsing it is a power board problem. If it is steady it is a LED array problem.
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Disconnect the power from the TV and then disconnect the LED power cable from the power board. Reconnect the power to the TV and then check the voltage at the power board’s LED power cable connector. It should measure ~ 250 - 280V DC or maybe even as high as 300V DC If it is not that high or is pulsing it is a power board problem. If it is steady it is a LED array problem.
''If the backlights stay on,'' check the voltages at the power board’s mainboard cable connector and see if they are as per what is marked on the power board near the connector. If they are as marked and also steady then it is a mainboard problem
Hi,
Try the following:
Disconnect the power from the TV.
Disconnect the cable between the power board and the mainboard.
Reconnect the power to the TV.
The TV screen backlights should turn on full and stay on. There will be no picture because the mainboard is disconnected.
''If the backlights don’t stay on or they blink'' then there is a problem with the power board or the LED array.
Disconnect the power from the TV and then disconnect the LED power cable from the power board. Reconnect the power to the TV and then check the voltage at the power board’s LED power cable connector. It should measure ~ 250 - 280V DC. If it is not that high or is pulsing it is a power board problem. If it is steady it is a LED array problem.
''If the backlights stay on,'' check the voltages at the power board’s mainboard cable connector and see if they are as per what is marked on the power board near the connector. If they are as marked and also steady then it is a mainboard problem