first let me say thanks to all those who help out us novices. Your advise and help is greatly appreciated.
I was recently given a 47LE5500 which in an LG LED Backlit tv. Owner thought the set had just died one day when they went to turn it on. Dont know if there was sound or not. I tried hooking up a sound source to an av input but since screen is dark i cannot see any menus. I fumbled through the remote but never got sound. when powering up with the remote or main power button the Power light comes on and stays a steady white color. No flashes. also the LG logo lights up. I open up the set and found that is uses the EAY60803301 power board. It has a daughter board that is labeled LED driver. I found 4 fuses that all are good. I measured the voltages on P201 and have 12, 20, 3.5 supplies. the power on lead is at 3.4V.
I cant figure out where to measure the Vled voltage but board says it should be 136v typical.
I know all these sets have a power up sequence so i dont know if i am in some sort of standby mode or not. both the Main board and the power board look fine with no indication of overheating
I am a techy so i can use meters and scopes to make measurements.
Any help or advice to get this guy up and working is much appreciated.
thanks
Tom C (aka topcat150)
I was recently given a 47LE5500 which in an LG LED Backlit tv. Owner thought the set had just died one day when they went to turn it on. Dont know if there was sound or not. I tried hooking up a sound source to an av input but since screen is dark i cannot see any menus. I fumbled through the remote but never got sound. when powering up with the remote or main power button the Power light comes on and stays a steady white color. No flashes. also the LG logo lights up. I open up the set and found that is uses the EAY60803301 power board. It has a daughter board that is labeled LED driver. I found 4 fuses that all are good. I measured the voltages on P201 and have 12, 20, 3.5 supplies. the power on lead is at 3.4V.
I cant figure out where to measure the Vled voltage but board says it should be 136v typical.
I know all these sets have a power up sequence so i dont know if i am in some sort of standby mode or not. both the Main board and the power board look fine with no indication of overheating
I am a techy so i can use meters and scopes to make measurements.
Any help or advice to get this guy up and working is much appreciated.
thanks
Tom C (aka topcat150)
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