Samsung lcd tv backlight turns off

have you been in the back could just be lose connector from power supply to inverter board worth a go or you may see some think else standing out leave tv off at least 10 mins or discharge it if you know about tv witch it sounds like you do good luck

I would check the power board capacitors. Many people are losing the electrolytic caps on these boards. It is possible yours are failing only when they heat up.

Check for any loose soder points or loose connections with wiring sockets to backlight inverter board.

I think that the connectors from the backlight inverter board that go to the LCD panel's backlight are a bit loose which explains why it comes back on when tapped. I am positive that unplugging and replugging the inverter cables should do the trick. WOuld like to do it yourself? It requires you to open up the tv ofcourse.

This does not seem to be a power supply issue but rather an issue with the backlight inverter board. When the screen goes black, take a flash light and focus it on the screen from a close distance and several angles. See if you notice a very faint image. Try changing the channels to make it more noticeable. Try it and let me know

Hmm, this sounds like exactly what I have, richard. I have replaced the t-conn to no success.....have you discovered anything new?

I have sound but my tv screen is black. Sometimes when I turn on the tv I get a picture but after 15 minutes or so the screen goes black again.
It's a 4 year old LCD.

No quick fixes. A component such as a capacitor is heating up and failing. Sometimes a cracked solder connection will work fine until it heats up and no longer sustains the connection.

When the screen goes off, shine a very bright flashlight at the screen to see if the image is still there. In many cases, the problem is the screen backlight, which consists of several CCFL tubes (fluorescent lamps) and a circuit board called the inverter (similar to a lamp ballast).

If the image is there, but the backlight is off, then you just may need a new inverter board.

no if the lamp works fine for hours , could be a signal problem check signal connection and wiring

Probably a bad Inverter board. I have a Dell 32" LCD TV but it has a Samsung Panel inside, found a burnt transformer on the inverter board, Still trying to find a replacement.


My TV comes on for a second then goes black, power still shows on but no picture. 1.5 years old

If you are not a tech person, take it in for service.