do not have a standby light
Hi @oldturkey03, I have the same issue as described in the original post. I have also replaced both my main board and power supply and still do not have a standby light or any activity when I plug in the TV or press the power button. I have taken the voltages on both the old power supply and new power supply while they are plugged into the wall. I measured on the connector that goes between the power supply and main board. The original power supply had voltages of .93 across the 3 middle pins on the top row. The same pins on the new power supply are at 1.12. Seems like a slight difference, but with both power supplies plugged into AC power and unplugged from the main board, I am not getting the backlights to light up like others have troubleshooted before. So I am still unable to determine if it is a bad power supply or main board. Do you have any further troubleshooting tips?
In the pictures, the power supply that is installed in the tv with the wires coming out of it is the new replacement board that I bought. The other picture of the uninstalled power supply is the first one that was in the TV before I replaced it.