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LG TV: image = No. sound = Yes
Snuf3:
Hi Everyone
I have an LG 43UK6300 TV
After 2.5 years of use, the image disappeared all of a sudden but I can hear the sound (even the sound that comes from my PC /HDMI)
I want and I will repair it myself. But I need a small piece of advice.
I baked the motherboard at 200 degrees in the oven for 10 minutes (Utube Video) and the only result: I feel dumb :57:- it didn't help.
When I opened the TV I saw that the LED lamps are working. They emit light
My next step: buying a Multimeter for checking the LEDs
I never worked with one. Will you think that this one should do the work?
https://www.amazon.fr/Multimètre-numérique-AstroAI-amplificateur-tension/dp/B01ISAMUA6?ref_=ast_sto_dp
*If anyone has a suggestion / another step that I should follow - I will be happy to hear
*Should I check also other components with the Multimeter?
:c017:
downunder:
A multimeter would be a good step but not for checking the LEDs since you state the the LEDs are alight and therefore working, but it would be helpful to check if you're getting 12Volt on both sides of the fuse on the T-con board. The fuse will be tiny and located close by to where the flexi from the main board connects to the T-con. Bruce
Snuf3:
Thanks, I will check it. After searching the net I think my situation is better described as "backlight but no display". When I turn the TV, it change to a shade of gray which mean that there is backlight. I have a question.
Since I never used a Multimeter:
1. can you tell me if the one I provided as a link is good for my needs?
2. Can it be that Most of the lamps are ok but there is a few defectives lamps that cause this problem?
3. I tried to "light torch the screen" test. I didn't see an image
downunder:
Meter is fine. Yesterday all I got on the link was images of dogs. A faintly lit screen means that the backlights are working but no data is being fed to the screen from along the bottom of the panel -hence the need to check the fuse on
the T-con board. Unlikely that the backlights are faulty - a few dead LEDs will usually shut the backlights down due to current sensing. The torch test proves that no picture data is getting to the screen, so a faulty T-con or a faulty display are the likely scenario.
Snuf3:
:c017:
I will open the TV and I will try to to the max tests possible.
Is there are some other test you suggest me to preform?
If I run over the different components . Can you confirm that my assumptions are correct?
LED: not causing the problem since I have a faintly lit screen + torch test that show no images
Power supply: I have sound, the TV is on. work perfect
Mother Board: Can/ should I test it?
T-Con: the first thing to test...
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