20 Most Recent LG 37LC7D 37 in. LCD HDTV - Page 4 Questions & Answers


Have the power supply checked out. I've worked on your particular model with the same problem. Turned out to be bad capacitors in the power supply.

LG 37LC7D 37 in.... | Answered on Oct 19, 2012


Check and replace its main digital processor board.

LG 37LC7D 37 in.... | Answered on Sep 14, 2012


You will need to have the set properly diagnosed to pinpoint the problem. If you have electronics repair abilities, check the capacitors in the power supply to start with. Other than that, you could be looking at a bad inverter, bad CCFL lamp, faulty power supply, or a main board.

LG 37LC7D 37 in.... | Answered on Sep 07, 2012


Replace the main board should solve the issue. You can get replacement boards along with free diagnosis to help insure its the main board that needs replacement by sending a email to the guys at tvrepairworld customerservice@tvrepairworld.com

LG 37LC7D 37 in.... | Answered on Aug 05, 2012


What is the problem with your LG TV? Provide more details please.

LG 37LC7D 37 in.... | Answered on Jul 23, 2012


If you are not getting any power then the first thing to check would be the 2 fuses on the power supply board. Below is a picture of the power supply board with the 2 fuse locations circled in yellow. The fuse values are printed right on the board, just use a multitester to check to see if they are blown. If the fuses are both good then the next thing would be the filter capacitors on the power supply board. The second picture below shows the capacitors to check. Look for bulging tops, they should be flat. If any show signs of bulging then they will need to be replaced too. You can get a kit of the capacitors at this link:
http://www.ccl-la.com/catalog/product_info.php?cPath=21_77&products_id=214

I hope this helps,
BuddyMc
7_17_2012_9_01_01_pm.jpg7_17_2012_9_06_10_pm.jpg

LG 37LC7D 37 in.... | Answered on Jul 17, 2012


It sounds that, the T'Con board to your TV has the fault. Check this link and select Electro-help site. You can get more details about this fault with illustrations. I think that, you might make it right, if you has some knowledge in electronics. an other possiblility is with its back-light CCFL lamps or it inverter board.

LG 37LC7D 37 in.... | Answered on Jul 05, 2012


On the side or front if it has one--many sets no longer provide that.

LG 37LC7D 37 in.... | Answered on Jun 15, 2012


Good day!!!!


That problem is usually cause of faulty capacitors on the power supply board..

Just follow this instruction to fix your TV..

1. Open the back cover of your TV.
2. Look at the power supply board..Its normally connected to the power cord..
3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors..
4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value..
5. Some of the capacitors not bulged so its better if have a capacitance meter..


if no bulged capacitors that problem usually cause of faulty T-con board..

LG 37LC7D 37 in.... | Answered on Jun 06, 2012


The set need service. Its back light inverter, and CCFL lamps should be checked. Sometimes, CCFL lamps might need replacement.

For more details, just type in the site name "Electro-help" to your search engines' search box [not in the address bar of your browser], and click search. It is an electronic equipments service help site.

All details you want are there. Note the position of hyphen in between words in site name, when you type it in. The site will appear as it is in web; subtitled as Service help to electronic home entertainment equipments.

Pull up older posts. You can get all details.


You can locate it either at the bottom part of first search page, or at the top of second page. Detailed descriptions are there to help you.

Sometimes, clicking on advertisements by the side and bottom of each post might help you to get details about the availability of spare parts; price etc:-

LG 37LC7D 37 in.... | Answered on Jun 05, 2012


Here is the link for the user manual, make sure all the leads are plugged in correctly in accordance with the user manual to your TV before you reprogram it.

http://static.fixya.com/Manuals/L/LG/37LC7D_37_n_078017CFC676EB17C0D2E6BF5E700917.pdf

Hope this helps.

LG 37LC7D 37 in.... | Answered on Jun 04, 2012


make sure cables are right because one could be loose or in wrong place

LG 37LC7D 37 in.... | Answered on May 27, 2012


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.4_19_2012_3_43_43_pm.jpg

lf set is opened at least look at power supply board for bad caps that are puffed up on top like these.

LG 37LC7D 37 in.... | Answered on Apr 20, 2012


This sounds like a very common issue.

If set is hard to turn on (takes several tries)but will eventually turn on hereis what my guess would be.

Every set has a standby power supplythat is running 7/24 if the set is plugged in and it supplies voltage to theremote circuit that turn on the main power supply for the tv and hence turn theset on.

This is an area where companies cut corners by using lower rated voltage caps.By this I mean Standby usually provides under 10 volts to trigger the seton----what they do is use filter caps rated at say 10 volts max in a circuitwith 9 volts (example)=with the standby on all the time the filter caps(electrolytic caps) dry out and fail.

The problem usually begins where you have to turn set on or or two times andgradually gets worse--takes longer and more tries to get it to come up.

Once on it will stay on until turned off for a period of time.

The caps will begin to work better (regain some of thecapacitance) as they get hot--hence one it is on it will seem ok.

The beauty of this problem is most of themhappen when set is a year or two old (no warranty) and all you have to do islook at the top to locate bad ones.

They are generally black or blue and round and vary in --they have twoconnections each--a + for positive and a - for negative--not unlike a batterywhich in a way they are. The + and - are marked on top and bottom of most boards.

They are easy to replace and not expensive parts.

The tops are silverand metal looking with creases on top and if bad they will be puffed up ontop---tops must be perfectly flat with no brown material leaking top or bottom.

If this is your problem once you id them (make a drawing) you can begin.

Here is the critical part---on each cap is also marked the value like 220uf 10vdc---220 micro farad at 10 volts maximum.

If you find for example 6 puffed up and all are 10 vdc replace them with thesame value capacitance (like the 220 uf) but go up to at least in this case(from 10 volts) to a 16 or higher rated voltage cap.

The only issue is when you go up in voltage rated value the cap is larger sosometimes there is an issue of physical space for the replacement on the boardto fit them in.

The reason they cheapen these sets in this way is if 10 caps and you make25,000 sets there is a considerable savings in parts cost.

They do not care as long as it lasts past the usual one year parts warranty.

I have taken the time to be long winded because this really sounds like it maybe the problem you have.

See attached photo of a typical cap and if you have questions or need advicelet me know.4_4_2012_4_02_18_pm.jpgbad caps in the set's power supply look like these--tops are not flat hence puffed up.

LG 37LC7D 37 in.... | Answered on Apr 04, 2012


Thissounds like a very common issue.

If set is hard to turn on (takes several tries)but will eventually turn on hereis what my guess would be.

Every set has a standby power supplythat is running 7/24 if the set is plugged in and it supplies voltage to theremote circuit that turn on the main power supply for the tv and hence turn theset on.

This is an area where companies cut corners by using lower rated voltage caps.By this I mean Standby usually provides under 10 volts to trigger the seton----what they do is use filter caps rated at say 10 volts max in a circuitwith 9 volts (example)=with the standby on all the time the filter caps(electrolytic caps) dry out and fail.

The problem usually begins where you have to turn set on or or two times andgradually gets worse--takes longer and more tries to get it to come up.

Once on it will stay on until turned off for a period of time.

The caps will begin to work better (regain some of thecapacitance) as they get hot--hence one it is on it will seem ok.

The beauty of this problem is most of themhappen when set is a year or two old (no warranty) and all you have to do islook at the top to locate bad ones.

They are generally black or blue and round and vary in --they have twoconnections each--a + for positive and a - for negative--not unlike a batterywhich in a way they are. The + and - are marked on top and bottom of most boards.

They are easy to replace and not expensive parts.

The tops are silverand metal looking with creases on top and if bad they will be puffed up ontop---tops must be perfectly flat with no brown material leaking top or bottom.

If this is your problem once you id them (make a drawing) you can begin.

Here is the critical part---on each cap is also marked the value like 220uf 10vdc---220 micro farad at 10 volts maximum.

If you find for example 6 puffed up and all are 10 vdc replace them with thesame value capacitance (like the 220 uf) but go up to at least in this case(from 10 volts) to a 16 or higher rated voltage cap.

The only issue is when you go up in voltage rated value the cap is larger sosometimes there is an issue of physical space for the replacement on the boardto fit them in.

The reason they cheapen these sets in this way is if 10 caps and you make25,000 sets there is a considerable savings in parts cost.

They do not care as long as it lasts past the usual one year parts warranty.

I have taken the time to be long winded because this really sounds like it maybe the problem you have.

See attached photo of a typical cap and if you have questions or need advicelet me know


3_25_2012_5_47_16_pm.jpg

LG 37LC7D 37 in.... | Answered on Mar 25, 2012

Not finding what you are looking for?
LG 37LC7D 37 in. LCD HDTV Logo

324 questions posted

Ask a Question

Usually answered in minutes!

Top LG Televison & Video Experts

Ekse

Level 3 Expert

13434 Answers

The Knight
The Knight

Level 3 Expert

76177 Answers

RONALD CARTER JR

Level 3 Expert

438 Answers

Are you a LG Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

LG Televison & Video

  • LG Televison & Video

Most Popular Question

months tv loud cracking noise when first

  • Televison & Video
Loading...