When I go to turn on the LG 42PG20 you hear a click, the red light turns blue, another click and goes red. It currently takes about 30-40 times and the blue light blinks and the screen turns on.
Would like to try to fix on my own, but not sure what part I actually need, main board, or a control board of some sort.
Any help would be appreciated.
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@carbob62301 you do want to start by removing the back of the set. Unplugged of course:-) Then take a look at the power board. That is the tan colored board. Check the caps for any leaking, bulging or other damage. Check the cables and make sure they are properly connected.
Post some good pictures of your boards with your question so we can see what you see. Use this guide Adding images to an existing question for that. Any further troubleshooting you will need a mutlimeter etc. Just a hint of what might be going on. "When Power is pressed, look for LD703 to change to Amber. Listen for Relay Click, the click of the Relay is an indication of RL-ON going high. RL-ON is sent from the Main Board to the SMPS and when present the IC701 controls the Relay Operation. RL-ON going High and no Relay is a failure of the SMPS, RL-ON staying low is a failure of the Main Board.
Relay Operation means that the SMPS if working properly will output the 16V Supply to the Main Board. This voltage will allow the Tuner, Audio and Video Circuits on the Main Board to function, and if connected to an Antenna Input, Audio would be present. If the Relays closed and these supplies failed suspect a problem with the SMPS."
My favorite test is this one, just don't get zapped.
I suspect your SMPS (power board) to be the culprit here.
Let us know what you find at first.
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