I have a LG 42LB1DR . I had the symptoms just like described in Macho Monn may 16th 09 . I found popped capacitors just like described. But along with capacitor c235 ,capacitor # c218 was bad as well. I couldn?t find a new one anywhere so I bought a new power board from LG and no go. Still does the same black dimly lit screen and then shuts off. I read that this might be the inverter or another problem can anyone guide me on changing out he inverter or what is the suggestion from here. I really like to solve this one myself.

SOURCE: LG 32LC2R screen goes black after 2 sec.

My LG 32lc7d 32 inch TV is 9 months old (December 2007 to September 2008) and now the screen goes black with sound and the channels will change I can hear them. Also when the TV is fine if I touch the remote it freezes the picture, so turn it off and on witch does not respond to the remote for five seconds, turn it on again & it works for 2 to 3 hours then same problem. LG claim its a software problem, well I got link to the firmware update down load to my memory stick and stuck it in the usb port on the back of the TV, software update fine no problem, TV reset all my preference are lost no problem I can set it how I like it ,but now worst things are happening the screen goes black after 15 to 20 minutes and no sound now ,so the firmware did not work but cased more problems and less viewing time .NNNOOO more LG product for me in life again .
I bought the TV for $1000 us and the DVD up converting player for $110 + sound system
So I could 1 remote to make life easer for me, but life is better for LG now since they have my money and all I have are their problems.
We should come together and attack LG about this problem or boycott them and their products for good, hundreds of thousands of people have this problem and nothing.
What’s the sense of a warranty if there no fix for your problems and you can’t get your money back. I have bought so many LG products and now no fix. There are millions of people who don’t have a $1000 us in there bank account..
I now feel like I was held at gun point and robbed by millionaire.

Dave Naylor

• 834 Answers
• Posted on Sep 20, 2009

SOURCE: Same problem

not just lg i service all brands and this is a common thing they are cokking these parts
these set get really hot

SOURCE: How do you find out which capacitor is bad on

Usually you can identify defective capacitor when you see the the top cover on it pop up, sometimes short circuit across its terminal can be checked by an ohm meter. Hope it helps

Testimonial: "Thanks! That helps alot."

SOURCE: Where can I buy a new power board for my Plasma LG

I had the same problem and opted to take the board out and replace the caps. They were all the same capacitance. Cost me $6.61 for 10 new caps (needed 9, 10 was cheaper). If you can solder, watch the capacitor videos on YouTube and give it a go.
There is a replacement for the original. You can try http://www.partstore.com/Model/LG+Electronics+Incorporated/LG+Electronics%2fZenith/50PG20.aspx?p=1&z=50&c=6e080ee60c7dbeec930c9d72f2d3d6f7&bs=Category&bd=Asc&ms=Category&md=Asc&k=&on=
and http://www.shopjimmy.com/lg-eay39190301-power-supply.htm


Good luck

Testimonial: "This fix worked perfectly! My TV was repaired for under $10."

SOURCE: Hello i have an LG

First check your inverter. If your multimeter can read high frequency signals (~50 kHz), hold the probes about an inch above the inverter and a fraction of an inch apart. If you see a 1 or an actual value, you have a good inverter. If you see a reading near 0, the board is bad or the multimeter can't resolve the frequency. You can use an oscilloscope instead.

The backlight is another suspect part. This failure usually shows up as a gradual fading of the brightness or the on-screen image change to pink/red. With a bad backlight, you'll usually see a very dim image if you look at the TV from an inch from the screen. Block the room light from overwhelming this image (sometimes a carefully positioned flashlight will help you see something).

In some cases the video board might also fail.

In either case, you can buy a replacement inverter for $50-150 and just do a simple swap. Disconnect all of the wires (connections are similar to molex and ribbon cables in a computer) and remove board (a few screws usually). Connect the cables to the new inverter. (If you google backlight inverter replacement, you'll find videos and text descriptions.) Note the part number on the board, including the Rev number, and order the exact one (shopjimmy.com or lcdparts.net are good starting points). Universal inverters do exist but can result in reversed controls (up to lower the brightness). Replacing individual parts on the board is cheaper but more prone to not tracking down all of the bad parts.

If the inverter is good, then it's probably backlights themselves (several in most TVs). These are sandwiched on the perimeter of the TV (usually under some tape that holds the lamp, reflector and other parts together. You need to order by length and width and get ones for your TV size. Remove the tape, and separate the reflector (make a note of how things are put together) then you have to Dremel (or use another rotary tool) to remove the plastic to get the backlight out. (They are often molded into the frame.) Then put in the new backlight and reassemble everything. (http://www.lcdparts.net/howto/default.aspx) but for an overview: http://www.inventgeek.com/Projects/BacklightFix/overview.aspx Then push the new backlights into place, reconnect the wires and close up the sandwich of tape and other parts around the screen. Then replace it in the bezel.

With a good spare backlight, you can test an inverter for condition (plug together and turn on the tv while the box is open). Similarly a good inverter can test the backlight.

I hope this helps.

Cindy Wells