Hi, I need some help with an LG tv, it's 32 inch LN5400. I'm brand new to all things electrical, so apologies in advance for my lack of tech knowledge. I'm keen to learn more and have been reading up and watching videos etc.
The tv has the sound but no picture problem. Screen is totally black, doesn't blink on or anything. I've done the flash light test and can see the lg logo faintly on screen. I have removed the back and replaced the power supply with a new one but it was still the same. I read up some more and have now tested the power supply board with a multimeter. The readings for the wires going to the main board and to the led strips seem to be right.
So with the led strips I have used the multimeter in diode mode and tested the ends of the strips and am getting the beep which means they are working? I have also scratched away a bit of plastic either side of each LED to test each one. All are lighting up except I can't seem to get the ones on the far end of the strips to light. I can't imagine it would be just the end ones on all three strips that are blown? I am getting a beep on these end ones though.
Can anyone advise what may be the issue and also perhaps I am testing these end leds wrong?
Thanks a lot.
The tv has the sound but no picture problem. Screen is totally black, doesn't blink on or anything. I've done the flash light test and can see the lg logo faintly on screen. I have removed the back and replaced the power supply with a new one but it was still the same. I read up some more and have now tested the power supply board with a multimeter. The readings for the wires going to the main board and to the led strips seem to be right.
So with the led strips I have used the multimeter in diode mode and tested the ends of the strips and am getting the beep which means they are working? I have also scratched away a bit of plastic either side of each LED to test each one. All are lighting up except I can't seem to get the ones on the far end of the strips to light. I can't imagine it would be just the end ones on all three strips that are blown? I am getting a beep on these end ones though.
Can anyone advise what may be the issue and also perhaps I am testing these end leds wrong?
Thanks a lot.
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