@bipasaz if you have can see an image with the flashlight, it will most likely not be a board error, but the backlight strips itself. A bad T-con board will not produce an image, nor will a bad main board. When those fail you will not see an image with the flashlight.
Do not just go ahead and replace boards. There are two thing you can check with a simple multimeter. Check the voltages on the the connector from the power board to the main board., There will most likely be a BL_En line, which tells the power board to turn the backlights on. The next thing to measure would be the backlight LED output on your power board. Set your meter to the 300VDC range when you measure those. IF there is no voltage or low voltage then you most likely have issues with the diodes on the backlight circuit. None of this is complicated or even dangerous, for as long as you keep your fingers of the HOT part of the power board..
It will help if we can see your boards so we can guide you further. Replacing boards without checking them is a waste of resources and money. Don't just change them without checking unless you have to much money :-)
Just to clarify, the LED driver is never on the T-con board and the LED backlights are most commonly connected in series so if one LED fails, the strips fail. Some TV's use a combination of parallel and series connection on those strips, that can cause one region of the screen to appear darker if one set fails.
[guide|21499]
+
+
=== Mise à jour (12/10/23) ===
+
@bipasaz looks like you have a bulging capacitor on your board.
+
+
[image|3172871]
+
+
You will need to replace that. Where there is one there are more :-) replace all three of those. Make sure that you use high quality capacitors, like Rubycon or Kemet. Also, get the 105C capacitors. We do not know the values off those, but those should be written on the capacitors itself. Let us know if you need some help with that.
@bipasaz if you have can see an image with the flashlight, it will most likely not be a board error, but the backlight strips itself. A bad T-con board will not produce an image, nor will a bad main board. When those fail you will not see an image with the flashlight.
Do not just go ahead and replace boards. There are two thing you can check with a simple multimeter. Check the voltages on the the connector from the power board to the main board., There will most likely be a BL_En line, which tells the power board to turn the backlights on. The next thing to measure would be the backlight LED output on your power board. Set your meter to the 300VDC range when you measure those. IF there is no voltage or low voltage then you most likely have issues with the diodes on the backlight circuit. None of this is complicated or even dangerous, for as long as you keep your fingers of the HOT part of the power board..
It will help if we can see your boards so we can guide you further. Replacing boards without checking them is a waste of resources and money. Don't just change them without checking unless you have to much money :-)
+
Just to clarify, the LED driver is never on the T-con board and the LED backlights are most commonly connected in series so if one LED fails, the strips fail. Some TV's use a combination of parallel and series connection on those strips, that can cause one region of the screen to appear darker if one set fails.
@bipasaz if you have can see an image with the flashlight, it will most likely not be a board error, but the backlight strips itself. A bad T-con board will not produce an image, nor will a bad main board. When those fail you will not see an image with the flashlight.
Do not just go ahead and replace boards. There are two thing you can check with a simple multimeter. Check the voltages on the the connector from the power board to the main board., There will most likely be a BL_En line, which tells the power board to turn the backlights on. The next thing to measure would be the backlight LED output on your power board. Set your meter to the 300VDC range when you measure those. IF there is no voltage or low voltage then you most likely have issues with the diodes on the backlight circuit. None of this is complicated or even dangerous, for as long as you keep your fingers of the HOT part of the power board..
It will help if we can see your boards so we can guide you further. Replacing boards without checking them is a waste of resources and money. Don't just change them without checking unless you have to much money :-)
[guide|21499]