I tried to watch some tutorials posted on YouTube and have the following information. check picture settings or input or source The TV was starting to have an issue that while watching it the picture was seeming to get a little jerky like it wasn't refreshing fast enough. It wasn't always noticeable and I initially though it may have been a signal issue with our cable. Eventually we turned on the TV one morning, the picture came on and then disappeared after 2 or 3 seconds but we still had audio. I tried to pull up the menu screen and that was not visible. I performed the flashlight test and there are images visible with the light. I removed the back cover and took pictures of the attached boards and also saw that the backlights seemed to be working but did seem like they were not quite a constant consistantly light. They never completely extinguish but do seem to fluctuate in brightness slightly. I did not see any visible issues with any if the capacitors being swollen or blown and did not see any apparent burnt components or boards. Below are the readings I got from one board but I was not sure where to get the readings on the TCON board. Main PBA readings CN201 1. 18v. Actual 13.1v 2. Sw. Power Actual 13.1v 3. 18v. Actual 13.1v 4. 5v. Actual. Falling to -1.6mv 5. 5v actual. Falling to -1.7mv 6. 5v actual 5.15v 7. 5v. Actual 5.15v 8. ground actual 13.1v 9. Ground actual 13.1v Any help would be greatly appreciated so I can buy the right parts from you. Thanks, Chris
I would start with checking the power supply 12vdc output, make sure it is stable with no ripple. If the power supply checks out fine, I would then suspect the main board.
SOURCE: Repairing a LED TV
The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
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