Question about LG 47LG70 42 in. LCD TV

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47lg70 powers on back lite is on but no picture black screen

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  • 47 Answers

Maybe Bad caps in power supply,Crack or splits on top of cap or leaking, Check value of caps in power supply.

Posted on Apr 17, 2014

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Posted on Jan 02, 2017

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dang870
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SOURCE: My 47LG70 recently produced a loud pop and then

If you are a do it yourselfer, there are several videos on youtube about fixing this issue.

Here is a link to one of them.

http://www.youtube.com/watch?v=3GmtBthpzDk

Posted on Mar 23, 2013

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1 Answer

How to repair LG LCD TV 47LG70-UA no picture or sound


Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Mar 12, 2016 | LG Televison & Video

1 Answer

TV will shut off after 2-5 minutes


It is probable that there is power supply trouble. Visual examination of capacitors does not reveal internal electrical failure.

Jan 26, 2014 | LG 47LG70 42 in. LCD TV

1 Answer

Monitor come on for a few seconds then goes black,green signal light stay on green. can you help


the monitor may be losing the back lite. take a flash light or bright light and shine it at the screen after it goes black. can you see a faint picture? if so the back lite has failed. usually the cost of replacement exceeds the cost of a new monitor but there are a couple of web sites that detail the replacement of the "ccfl" cold cathode flouresecent light.

Apr 27, 2011 | Proview PL713B 17" Flat Panel LCD Monitor

3 Answers

47LG70 - PICTURE WENT OUT. STILL HAVE SOUND. HEARD A POPPING NOISE WHEN PICTURE WENT. TV IS ONLY 1 1/2 YEARS OLD. ANY IDEAS WHAT MAY OF HAPPENED.


I have had the same problem off and on with my 47LG70 for months. When the "popping" noise happens, the blue light in the corner stays on, so I know the tv is still on (sometimes I still have sound, sometimes I don't). Sometimes the screen goes black, but other times it is blue. If I turn the tv off then on again, it might stay on for seconds, minutes or hours. It's been very frustrating.

This seemed to happen right after I got my new Comcast box, which came with an HDMI 1.3 cable. I read somewhere online that this tv might not be compatible with that cable, so I unplugged it and am using component cables again. I just did this today, so I don't know if it will work, but so far the tv has been on for 30 minutes with no problems.

I'm pretty ignorant about HDMI compared to component cables. I imagine I will not get as good a picture with the component cables, but I am willing to sacrifice quality if I can just get the darn thing to work. Mine is also only 18 months old.

Hope this helps. If it doesn't, maybe someone else out there can help us both.

Sep 21, 2010 | LG 47LG70 42 in. LCD TV

1 Answer

Ds lite green power on, screens black


Sounds like the processor has gone on the mainboard.
Using r4 or similar card? if so these burn out the board sometimes.

Nov 24, 2009 | Nintendo DS Lite Console

1 Answer

Will not boot... black screen?


Try removing the battery completely and powering it up on AC power. Sometimes a dead battery (even if you're plugged in to AC) will stall a boot-up in its tracks. If this doesn't help, please reply back and let me know if anything changed.

Jul 09, 2009 | IBM ThinkPad T40 2373 Notebook

1 Answer

Power lite is on, screen is black.


This seems to be a common issue with this model. If it is still under warranty send it back to acer. If not you can try this fix at http://eric.chromick.com/aa1/aspire-one-black-screen-of-death/

Will not hurt it anymore than it is.

Jul 04, 2009 | Acer Aspire One PC Notebook

1 Answer

Screens stay black, power lite is solid green


does it make the boot up sound? if so its a fault with your screen..can replace screens for £7.50 off ebay. try re- inserting ribbon cable for screen b4 buying new screen tho (could be that). if you can't hear bootup sound when powering up then something else wrong. maybe F1 or F2 fuse blown (test with a multi meter) look on youtube for tutorial

Mar 28, 2009 | Nintendo DS Lite Console

2 Answers

RCA 32 in TV no picture no sound just a beeping noise TV power is on


HELLO.! IT SOUND'S LIKE A POWER SUPPLY PROBLEM TO ME.!!! & FOR THE TIME YOU WILL PUT IN TO IT & THE MONEY .!!! YOUR BETTER OFF GETTING A NEW SET.!!!HOPE THIS HELP'S YOU.!!!"GOOD LUCK"

Jul 20, 2008 | RCA 20F511T TV

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