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LG 42LC7D-UB Television - Page 2 Questions & Answers
I have a lg 42lc7d with sound but no picture.
Check and replace the back-light inverter board.
If you wish to get more details, check the site linked here.http://electronicshelponline.blogspot.com/
Selecting the view option, either to
Mosaic / Time
slide, can be selected by the
drop-down list, at the top left of the
display window, will make surf easy.
You can also do a search, by type in the brand name/model number/IC
used, in the search box at the top right of the display window.
Subtitles don't fit on screen
Look for the "ratio" button on the original LG remote that came with the TV, and press it as many times as it takes to get your picture format correct for you to see the full subtitles.
Good Luck !
Lg 42lc7d-ub slow startup
Hello,This is a very common symptom indicating the the filter capacitors on the power supply board are beginning to fail. These parts are used by the power supply to stabilize the power from the board but they overheat and start failing after a few years of use. If you can do a little soldering then you can do the repair yourself by replacing the filter capacitors of the board. Below you will see a picture of what the capacitors look like when they start to fail.
And here is an article about failing capacitors:
http://www.ccl-la.com/blog/index.php/capacitors/There are 9 capacitors on your board to replace and once they are replaced the unit should be as good as new. Here is a link to information showing which capacitors your board needs and the locations of the ones to replace.
http://www.ccl-la.com/catalog/product_info.php?products_id=214I hope this helps,BuddyMc
My friend gave me a lg 42 inche lcd tv. i didnt ask her if it worked or not... i took it home and then pluggged it in, but the led light keeped flashing green then after awhile it stays steady and the
about the only simple thing would depend on if you can safely get the back off to look at the power board.Danger there is if set placed face down to remove cover, any downward pressure can destroy the front screen, it has to be put face down so frame around screen is support with no weight on the screen itself.A common failure in these sets is filter caps or capacitors, follow power cord to the power board and LOOK for puffed up caps and if find even one on that board or elsewhere puffed up it will be easy to replace and not expensive---I only mention this as it is common and not real hard to fix.I will attach some photos I have gathered that show this from mild to severe. If you get it open look carefully.It may or may not be your problem but since it is common and easy to see start there.
the one on the right is a mild case but is bad.
The ones with the arrows are moderate but also bad.
These two remind me of the old popcorn you put on the stove and waited for it to puff up, extreme.
Green light black screen
I see so many here with no sound/nopicture issues:ISSUES: 1. IF sound main fuse/s are good.2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.3. almost all these sets the troubleshooting involves
checking voltages on the main power board to narrow down theproblem.4. Be safe and if you do not know what you are doing don't open the set.Answers to issues:1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.4. Safety first--no TV set is worth getting injured or even killed over.
LG 42LC7D-UB, Bad LCD Controller Board????
Steve, that was awesome. Thanks a bunch. I already have the tools and I can get the solder easy enough. Thanks a again. I went to Best Buy this weekend and all they could say is that the entire board would need to be replace and that they really recommended a new tv as the cost for the new board would be as much as a new TV.... :( typical of them!
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