My LG 55LE5500-UA tv just went blank when it was turned on one day. I have power but when I turn it on I don't get no picture or sound I can see the backlights working from the back and tried the flashlight test but didn't see nothing. I'm thinking this is a main board problem but not sure was also told this tv does not have T-con board again not sure. Any help would be appreciated.
This problem is related to the mainboard and should be replaced. You can try to heat up the microprocessor with a heat gun though best solution is to replace mainboard. Part number is EBU60864321.
Hope this helps!
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Check your input selection. Check what source your on. Many times a accidental push on the remote control can change the screen. Check cable box.
Check LEDs.
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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