Hello everyone. I am new to the site and looking for help in troubleshooting a LG Model 55LD520. I have narrowed down what I think is possibly the main board but wanted to seek everyone's thoughts here first.
To start the tv when powered on would blink red 3 times and then change to brite blue for a second till it dimmed, but stayed on. No backlight was present nor the LG logo utilizing the "flashlight trick". Through a series of isolation on boards and connectors, here is what I found.
On the power supply board, connector "P201", I have separated the "ERR" & "INV-ON" wires from the connector. By doing this, I get backlights on the tv, but no logo display. If I connect the "ERR" wire to the connector, I get a flashing strobe effect on the screen of the back lights . If I connect the "INV-ON" wire to the connector, the screen goes completely dark with no back light.
Can anyone help me identify where to go from here ?
To start the tv when powered on would blink red 3 times and then change to brite blue for a second till it dimmed, but stayed on. No backlight was present nor the LG logo utilizing the "flashlight trick". Through a series of isolation on boards and connectors, here is what I found.
On the power supply board, connector "P201", I have separated the "ERR" & "INV-ON" wires from the connector. By doing this, I get backlights on the tv, but no logo display. If I connect the "ERR" wire to the connector, I get a flashing strobe effect on the screen of the back lights . If I connect the "INV-ON" wire to the connector, the screen goes completely dark with no back light.
Can anyone help me identify where to go from here ?
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