Question about Televison & Video
Almost any device that has to be slapped around has a loose solder connection or a loose connection somewhere inside (could be a loose cable, like the lvds cable) or something similar. In very rare cases, it is something loose inside of a part and you will need to replace parts, but it is probably a solder connection or cable. solder connections are more difficult to fix, especially on the more complex circuit boards. a loose wire is easy to fix, so that would be your starting point. if you feel so inclined, lay the tv down on something soft face down, careful not to put any pressure on the fragile screen. you may have to remove the stand if laying it on the floor, use a blanket, etc...
take all the screws out of the back, some models you have some on the bottom, but most will be going straight in to the back of the tv. pull off the back, and then "reseat" all of the cables.. reseating is just unplug and replugging them to ensure they're all clicked or pushed into place. in some cases, they will be clicked and still need reseating.. make sure you look for locks, clips, etc on the cable ends, and be careful not to break any.
from your symptom, it sounds like it could be the LVDS cable, that goes from the main board(with lots of small circuits, maybe the inputs, etc) to the TCON board (one that drives the screen).. this is the most fragile and also the most likely to be causing this issue. ..
look to see if your tv still has backlight, this is even more likely the cause as you have power, backlight, just no picture.. if you dont have backlight, suspect the power or inverter boards, but still could be main. if reseating cables gets you nowhere.. use an insulated handle of some sort (plastic screwdriver handle (insulated)) to tap on the boards and see if the pic comes back, if you can get it back this way, could be a solder connection..
let me know what you find.. you can look for bad caps also, these are always a red flag - should be flat on the tops
Posted on Jul 30, 2010
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Posted on Jan 02, 2017
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