Chosen Solution
I picked up a free RCA LED55C55R120Q TV that the screen is only showing the backlight when powering on as well as on the front cover the Red LED solid (is off when powered off). I’ve unplugged the Frame Rate Control (LVDS) board and power supply to the LVDS board and still the same scenerio. I read on ifixya a protocol that I am not finding, and forgot to print out, where the first step was to unplug the T-Con board and if the backlights still power on, then replace the T-Con board. I did this also. Furthermore, I found a “100” Inductor loose inside the set as well as the base being screwed in with some strange looking sheet metal screws thankfully not fully since the threads for the base are not that style. I’m not sure and can’t see where that inductor would come from. I’ll check voltages next. Here are the images of the boards:
Power Board:
LVDS Frame Rate Control (FRC) Board:
T-Con Board:
Main Board:
LCD Screen:
Lone Inductor:
I picked up another free RCA LED55C55R120Q TV that the screen is only showing the backlight when powering on as well as on the front cover the Red LED solid (is off when powered off). I’ve unplugged the Frame Rate Control (LVDS) board and power supply to the LVDS board and still the same scenerio. I read on ifixya a protocol that I am not finding, and forgot to print out, where the first step was to unplug the T-Con board and if the backlights still power on, then replace the T-Con board. I did this also. Scenario Two (Same though different boards):
Power Supply Board:
Main Board:
FRC Board:
T-Con Board:
The picture you have labeled as the T-con board is actually the FRC board. The T-con board should be marked with part number: SNB 12PSQBC4LV0.1 or something similar. The inductor seems to have come from the T-con board. Add in a picture of that one and I will try to describe where it goes. This repair could be as simple as replacing the inducter (wouldn’t that be nice!). Add in the picture of the T-con board or replace it. Dan
