Re: RCA TV no picture, replaced all boards. Backlight ok
"I checked the voltage at the main board with and without the LVDS cable connected. There was not 12v anywhere. (The highest was about 2.3v) The cable is not damaged or pinched."
You have to have the switched 12VDC (It will be present when the power supply board receives the PS-ON from the main board) from the power supply board to feed the main board, then that 12V is fed through the switched Power MOSFET to supply the 12V to the T-CON when TV is powered on. The 12V is also used by the Audio circuit.
You should also report the DCV reading of each pins of the connectors of the power supply to see what you have and what you do not have.
Also post closed up pictures of this MEGMEET MLT-198TX power supply connector without the cable in place so we can see the labels of the connectors' pin.
http://www.shopjimmy.com/megmeet-mlt...wer-supply.htm
"I checked the voltage at the main board with and without the LVDS cable connected. There was not 12v anywhere. (The highest was about 2.3v) The cable is not damaged or pinched."
You have to have the switched 12VDC (It will be present when the power supply board receives the PS-ON from the main board) from the power supply board to feed the main board, then that 12V is fed through the switched Power MOSFET to supply the 12V to the T-CON when TV is powered on. The 12V is also used by the Audio circuit.
You should also report the DCV reading of each pins of the connectors of the power supply to see what you have and what you do not have.
Also post closed up pictures of this MEGMEET MLT-198TX power supply connector without the cable in place so we can see the labels of the connectors' pin.
http://www.shopjimmy.com/megmeet-mlt...wer-supply.htm
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