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No picture but there is sound.

My LG47LA20V is getting sound but no picture, when I turn the tv on I get the LG logo for a split second then the screen is black but you can faintly make out the picture when you go up close. When I turn the tv off you see the full bright picture for a split second also. I’ve read this could be a backlight issue. If it’s a backlight issue how come when you turn the tv off you see what every channel is on for a split second?

thanks

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3 commentaires:

Check for capacitor leaks. Makes sense that it shows for a split second.

par

How do I go about doing that? Pretty much a novice when it comes to this kind of stuff? @bmx2019

par

First a good google search

https://hackaday.com/2019/04/12/ask-hack...

1. Get a good screw driver kit (may be from ifixit - I am not an employee just a hobbyist...

2. Make photos of your TV

3. Read some of the teardown or disassembly of TV either here or in youtube.

4. It does not matter what brand - but you will get feeling for what to notice.

5. slowly unscrew everything -document clearly

6. Post photos of TV cirucits here. or may be you see a swollen capacitor

7. Whenever you come across a new term, just put in google or youtube.

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Hi,

Did you mean to say a LG -47LA620V as I can’t find anything on a LG 47LA20V?

If not, apologies.

If so, then here’s an image of the No Video/Normal Audio troubleshooting flowchart, found in the TV’s service manual which should help you to find the problem.

Block Image

(click on image to enlarge for better viewing)

You will need to have a DMM (digital multimeter) and know how to use it.

Be safety aware as there are exposed lethal voltages on the power board when you will be testing it for the other voltages.

If in doubt don’t, it’s not worth it. Call an expert.

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peter sutherland sera éternellement reconnaissant.
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