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SOUND BUT NO PICTURE

THE PROBLEM IS I HAVE SOUND BUT NO PICTURE , IT SEEMS TO START UP OK AND AFTER IT HAS WARMED UP THE PICTURE DISSAPEARS,

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  • bmar1108 Jan 20, 2009

    sound but no pic

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  • 558 Answers

Blown capacitors on the inverter / vga board replace them and al will be good.

Posted on Apr 27, 2008

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1 Answer

Technika help


Back-light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/

Aug 01, 2014 | Flat Panel Televisions

1 Answer

Lg 42le4500 tv when first turned on its okey after 2 minutes no picture black screen but sound ok, turn it off and back on againdoes the same


I would bet on some component(s) have become thermo sensitive. Most of the time capacitors can do this type of thing. Most likely the defective caps could be in the power supply.

To locate the defective caps, you would have to be able to run the supply and use the combination of a heat gun and freeze spray (liquid air spray) for cooling. At the same time you would have to monitor the output of the supply to see the components that cause the output change.

It is also possible to have thermo sensitive components on any of the other boards. This would also require proper troubleshooting.

The service rep would replace boards until he found the defective board. Then he would return the set with the new board and the bill for his work.

If your set is out of warranty, it may be better to consider a new set. Servicing these can be fairly involved and expensive.

Jerry G.

Jun 25, 2012 | LG Flat Panel Televisions

1 Answer

Samsungh LA40B530 No picture but sound


Hello,

try connecting tv to cable direct also try unplugging both converter and tv for wile like 5 mins plug both back in see if tv and converter sync, but if otherwise then
The ysus board is the most common reason.
you can try websites on ebay.com to buy parts for replacement...

Aug 03, 2010 | Samsung LA40B530 40 in. HD-Ready TV

2 Answers

Picture loss


Hi Joe
has the problem been resolved, I am experiencing the same thing, guarantee is 3 weeks out of date -typical!!

Jan 16, 2010 | Goodmans GTVL32W27HDF 32 in. LCD TV

1 Answer

No picture when turned on - sound ok


I think that you should try playing around with some of the plugs

Jun 21, 2009 | LG 26LC2D 26 in. LCD Television

1 Answer

Picture won't come in clear until TV "warms up" for 15 minutes or more


Change the capacitors first per the instructions in the link below. Symptoms could be anything from high-pitched hum to no picture at all. On these defective models, I would start at the caps and work back. It won't hurt to replace them anyway.

http://www.fixya.com/support/r741402-polaroid_flm_373b_lcd_tv_black_screen

Aug 28, 2008 | Polaroid FLM-323B Television

1 Answer

Lcd tv backlight prob


You need to replace the inverter board if you can find the spare part. Otherwise you need to replace the whole lcd panel.

Jan 01, 2008 | LG RZ-17LZ40 17 in. LCD Television

1 Answer

Trutech plv16190 picture going off after 3o minutes


Open the back of the TV,and look at the can shaped items on the boards.If any of them have the tops,or bottoms bulged out,they need to be replaced.This should get it working again.I hope this helps.If you have any questions,please let me know.Thank You very much!


Tyler

Dec 27, 2007 | TruTech PLV16190 Television

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