Hi everyone,
I decided to start a new thread since the last one was more about the power board issue (which I replaced). Here's the link to the old thread.
Here's a recap of the problems I am having now with the backlight.
Here's a link to the two inverter boards
http://www.shopjimmy.com/auo-19-54t0...t-inverter.htm
http://www.shopjimmy.com/auo-19-54t0...t-inverter.htm
So that's a good recap of where I am now.
I decided to start a new thread since the last one was more about the power board issue (which I replaced). Here's the link to the old thread.
Here's a recap of the problems I am having now with the backlight.
- There's two inverter boards on this TV, I previously purchased two replacement boards that I never used.
- I always had problems with the backlight on this TV (before the power board blew up). Sometimes I opened the TV and it would work for a few minutes or hours and sometimes the backlight stopped working almost immediately. Sometimes fast movement on the screen would trigger the backlight to stop.
- After replacing the power board, I left everything intact and the backlight would appear 2 seconds on power up and would disappear before I could see the image.
- I decided to replace the inverter boards, but didn't screw them to the TV, just left them floating around on the cables. The TV would turn on and the backlight would work correctly if I left it on the HDMI input (not connected to anything so black screen). If I changed to analog TV input (with the "snow") the backlight would turn off after 1-2 seconds.
- When the backlight was working on the HDMI input I could hear a buzzing noise coming from one of the transformer on the inverter board. The noise would lower when I lowered the backlight brightness in the menu.
- I replaced the inverter board that was causing the noise, still leaving it hanging on to cables not touching the TV. No more buzzing noise but still the same problem, works with HDMI input and turns off with the analog TV input.
- I left it 5-10 minutes on the HDMI input while I was doing something. Came back and changed to analog TV input and the backlight stayed open for a long time (turned off the TV before I could see it turn off by itself).
- Decided to put back the screws on the inverter boards and now the backlight turns off just before the image is visible, just like before I decided to unscrew it.
- I removed the screws, still working, put one screw back and no backlight (only the 2 seconds flash before image). The screw is, I think, used to ground the inverter boards (if you look at the image, you'll see what I mean).
Here's a link to the two inverter boards
http://www.shopjimmy.com/auo-19-54t0...t-inverter.htm
http://www.shopjimmy.com/auo-19-54t0...t-inverter.htm
So that's a good recap of where I am now.
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