Question about LG 50LA6200 50" 1080p 3D Smart TV 120Hz Dual Core 3D Direct LED Mount Bundle
No Backlit. Replaced Power Supply Board
SOURCE: LG 47" LCD FLAT SCREEN
> IF IT WASNT DIGITAL HD I WOULD HAVE SUSPECTED HIGH VOLTAGE POWER SUPPLY BUT THAT DOES NOT EXIST HERE.
Well, not completely true; the fluorescent backlight is still a high voltage device, even if only hundreds of volts instead of kilovolts, and either the lamp(s) or the power supply for it (them) is causing the dropout of your picture. When it does it next time, look at the screen from various angles, I think you will see that video content is still there.
Posted on Sep 14, 2008
I have the same issue with my LG 42PC3DVA and I narrowed it down to the Y SUS board. After a little research there are a few items that are prone to go. The ceramic fuses (as you found), sometimes the capacitors on the Y SUS, Z SUS, and power supply go along with them You can tell because thy will be bulged at the top instead of flat. I replaced a few of my capacitors - they are only $0.89 each so it was MUCH cheaper than a board.
The other thing that is common on the Y SUS in particular are the FETs (also called MOSFET). They can be replaced if you are good with a soldering gun but they are static sensitive so be grounded. They are also a bit tricky to test so you may want to do some research on how to determine if this is the issue... or you can just replace the whole board.
Posted on Oct 28, 2009
Check to see if you get Va and Vs voltages from the power supply. There should be some wires running to the y-sus. A couple of those wires will be labeled va and vs. Are they present? There will be a sticker stuck to the panel somewhere telling you what they should be.
Posted on Mar 26, 2010
Tips for a great answer:
Nov 06, 2017 | Samsung Televison & Video
Mar 17, 2017 | Sharp LC-60E69U 60" 1080p 120Hz LCD HDTV
Nov 29, 2016 | Samsung UN50EH5300 - 50" 5 Series...
Apr 02, 2016 | Sharp LC46LE830U - LC 46LE830U - 46 Aquos...
Feb 29, 2016 | Samsung Electronics UN55EH6000 - 55in...
Dec 05, 2015 | Samsung UN50EH5300 - 50" 5 Series...
Nov 30, 2014 | Hisense TA42P40M 42 in. Plasma Television
Aug 18, 2014 | Samsung Electronics UN46EH5300 - 46in...
Dec 17, 2013 | HP Pavilion F1903 19" Flat Panel LCD...
Jan 03, 2010 | Televison & Video
Sep 25, 2020 | Televison & Video
440 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: