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I have a 42in emerson flatscreen, which the imag
e tends to shut off randomly. The power and sound stay functional, however the image on the screen goes out. Any help with this issue is greatly appreciated.
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Try removing the LVDS cable that goes to the Tcon board and see if the set stays on, you won't have picture but does the sound stay on...if it does then replace the Tcon board, the only one you haven't replaced it sounds like
When the following conditions, namely the need to replace the LCD inverter: No image on the screen, but the power light stays on Dark display but still readable Between the screen flashes on and off 1/2 to several seconds Power light stays on, but no display and sound No image on the screen, but LCD TV still has sound Picture cycle on and off, as well as high-power LED lights
When the following symptoms, that is, to replace a laptop LCD screen: No image on the screen, but the power light stays on Dark display but still readable Between the screen flashes on and off 1/2 to several seconds Power light stays on, but no display and sound No image on the screen, but LCD TV still has sound Picture cycle on and off, as well as high-power LED lights
It sounds that the back-light CCFL lamp is faulty. It is time to replace it. When replacing, do it to all CCFLs, because, the life time to these lams are expiring now, as the set is nearly 4 years old. Check this link http://electronicshelponline.blogspot.com/ to get more details about how to replace the CCFLs. Pull up older posts there. Some among it have details.
An LCD unit? Sounds like the backlight is failing. When it goes black next time, use a strong light next to the screen and look for a faint image on the screen....
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