TV

Facing TV Problems? Ask a TV Technician.

Ask an Expert,
Get an Answer ASAP!

TV

I own a used LG TV (model # 42LN5700-UH) which was given to

Customer Question
us a few years ago...
I own a used LG TV (model # 42LN5700-UH) which was given to us a few years ago. I believe it was purchased new about 3-4 years ago. Last week the power light under the unit went out, and the TV stopped functioning. I changed the batteries on the remote, and checked all the power cord connections. I also used the manual button to try to turn it on per chance the remote was faulty. No luck. Another remote I have turned the power on the unit but for audio only at a high decibel level with no option to turn it down. My questions.
1. What could be the problem?
2. Is it fixable?
3. Is it worth repairing or is it time to look for a new TV?
Submitted: 1 year ago.Category: TV
Show More
Show Less
Ask Your Own TV Question
Answered in 1 minute by:
10/12/2016
TV Technician: Aric, Technician replied 1 year ago
Aric
Aric, Technician
Category: TV
Satisfied Customers: 45,327
Experience: 15+ years in the field. Owner of AV Installation, OEM and Repair company
Verified

Hello, Sorry you're having problems. I will address what you've asked in order here:

1) Offhand these symptoms (the TV not showing a power light at all, and then the set tuning ON, but with no control at all over the Volume to turn it down) directly points to a faulty/failing Mainboard in the TV. The Mainboard contains the EEPROM (processor) that controls the turn on/off function, as well as processes ALL volume, and the remote commands.

Ask Your Own TV Question
TV Technician: Aric, Technician replied 1 year ago

2) It is indeed fixable, but requires replacement of the Mainboard. This is roughly a $100 part on the used/pulled market (new parts are almost non-existent as all are pulled from sets with broken screens). Or closer to $250 parts and labor to have a TV repair shop perform the repair.

Ask Your Own TV Question
TV Technician: Aric, Technician replied 1 year ago

3) It is ONLY worth repairing if you are a DIY type and comfortable removing the back of the TV and replacing the Mainboard yourself. To help in this decision, the board is "plug and play" (meaning no soldering or special tools are needed to replace it). However if this is not something you're comfortable with, given the cost at a shop it does not make sense to put $250 into this set since it can be replaced for just a few more dollars.

Ask Your Own TV Question
TV Technician: Aric, Technician replied 1 year ago

Is this something that you were looking to repair yourself? If so, let me know and I will search for the Mainboard for you.

Ask Your Own TV Question
TV Technician: Aric, Technician replied 1 year ago

I just checked and that board is showing as "out of stock" at the link below (as well as other online vendors):

http://www.shopjimmy.com/lg-ebt62387719-main-board-for-42ln5700-uh.htm

Ask Your Own TV Question
TV Technician: Aric, Technician replied 1 year ago

That said, it may make more sense to put that same money towards replacement of the set unfortunately, or keep searching to see if a site eventually has one in stock.

Other than that I'm sorry for the bad news here and wish there were a quick fix.

Let me know if you need further help. Also, please do click a 3-5 STAR rating for my efforts before you go. That is how I am credited for my efforts by the site.

Ask Your Own TV Question
TV Technician: Aric, Technician replied 1 year ago

Do you need further assistance with this please?

Ask Your Own TV Question
Ask Aric Your Own Question
Aric
Aric
Aric, Technician
Category: TV
Satisfied Customers: 45,327
45,327 Satisfied Customers
Experience: 15+ years in the field. Owner of AV Installation, OEM and Repair company

Aric is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I'm screaming your praises!! WOW! I plugged my TV in and bammo! The picture came on bright and beautiful. What a relief! YOU saved me some money and headache.

VMUnited States

I love this site! $9 instead of a repairman or new/used frig can't be beaten. This older woman will worry less now that she knows about this site. Bless you all.

WindyUSA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

< Previous | Next >

Meet the Experts:

Louie

Louie

Technician

2,940 satisfied customers

25+ yrs. experience in the field and 5+ yrs. online, down to component level.

Rod

Rod

TV & Communications Sys Repair

2,355 satisfied customers

FCC Commercial License, Previous owner of Electronics Repair shop, 40+ years in electronic systems.

Steven

Steven

Technician

1,429 satisfied customers

Ma. Master Technician Lic. Authorized Warranty Support.

euro-pro llc

euro-pro llc

Technician

1,128 satisfied customers

20 years in TV repair,certified by all major brands- Sony,Samsung, LG,Toshiba, Panasonic, RCA,

Daniel

Daniel

Electrical Engineer

1,072 satisfied customers

BSEE (Electrical Engineer), 10+ years electronic design experience ,chip, board, component expert

Conrad

Conrad

Technician

946 satisfied customers

Training on many types of consumer electronics, training on Sony Samsung and JVC

Neil

Neil

Technician

803 satisfied customers

More than 10 years experience repairing TV's and electronics equipment.

< Previous | Next >

Related TV Questions
I have a samsung 55 inch LCD and all of a sudden the screen
i have a samsung 55 inch LCD and all of a sudden the screen has green haze through out the picture on all channels. Any idea … read more
Mike G.
Mike G.
Television Repair Technician
Vocational, Technical or Trade Scho
1,672 satisfied customers
Why can't I adjust the contrast on the Sharp
Why can't I adjust the contrast on the Sharp LC-43_50_55_65LBU591U? … read more
Harry
Harry
107 satisfied customers
I have a Panasonic Plasma TV model TC-P50S2. TV will turn on
I have a Panasonic Plasma TV model TC-P50S2 . TV will turn on but I receive a message saying " No Signal" . What should I check before I call for service? … read more
Shahid
Shahid
Owner of Repair Shop
High School or GED
3,494 satisfied customers
I purchased a Sony xbr55x960e through employee purchase. It
I purchased a Sony xbr55x960e through employee purchase. It arrived today and the DC power cable was missing how do I replace it? … read more
Jack
Jack
technician
factory trained engineer
2,159 satisfied customers
Kogan TV lights up with Kogan but no matter which button I
Kogan TV lights up with Kogan but no matter which button I press either on the remote or the TV nothing happens. … read more
p0llinate
p0llinate
Bachelors of Science
14 satisfied customers
I have a LG T.V. and direct tv. I am unable to record shows.
I have a LG T.V. and direct tv. I am unable to record shows. It shows recorded but when I open it up it asks if I want to delete it or not. In addition'. if I pause a show it freezes and the only way … read more
Harry
Harry
107 satisfied customers
Just bought saamsung un405300. How do i. Use remote to enter
use remote to enter letters in password ***** wifi? … read more
Harry
Harry
107 satisfied customers
SureTv picks up tv signal by way of its antenna they claim
SureTv picks up tv signal by way of its antenna they claim you will save a lot of money & that it's legal. What is your opinion of this product & others like it?… read more
Jack
Jack
technician
factory trained engineer
2,159 satisfied customers
My Sony Bravia TV when turned on briefly shows the Sony
My Sony Bravia TV when turned on briefly shows the Sony insignia then for less then a second shows the tv channel and then the screen goes black. … read more
Mike G.
Mike G.
Television Repair Technician
Vocational, Technical or Trade Scho
1,672 satisfied customers
I have a Panasonic TH-50PC77U Plasma TV. It is a December
I have a Panasonic TH-50PC77U Plasma TV. It is a December 2007 vintage. I was watching TV last night and the screen went blank. I cannot restore power to the TV via remote control or power button on t… read more
Jack
Jack
technician
factory trained engineer
2,159 satisfied customers
My 46 inch Sony flat screen TV has started to double image
My 46 inch Sony flat screen TV has started to double image on the right side of the screen when I turn it on. After 15 minutes its fine. A friend has the same TV which had the same problem and Sony ho… read more
Mike G.
Mike G.
Television Repair Technician
Vocational, Technical or Trade Scho
1,672 satisfied customers
I'm inquiring about a Hatachi TV. Can you help? 10 yrs?
Just today. We've had snow and cleared all off of dish thing outside and ‘Execute Auto Scan First' appeared on screen … read more
info tech
info tech
Self Employed
Vocational, Technical or Trade Scho
318 satisfied customers
Originally, I could only hear sound on my tv, but no
Originally, I could only hear sound on my tv, but no picture. With lights off and flashlight held to screen I could see a faint picture. thought it was the t-con board, so I ordered it. I replaced the t-con board and now there is no picture or sound, but the green light indicating the tv is on does come on. Any idea what could be wrong? … read more
Shahid
Shahid
Owner of Repair Shop
High School or GED
3,494 satisfied customers
My vizio tv has no buttons and I've lost the remote.
My vizio tv has no buttons and I've lost the remote. … read more
Jack
Jack
technician
factory trained engineer
2,159 satisfied customers
Picture is toooo big for tv.howdo I get it back to the right
Picture is toooo big for tv.howdo I get it back to the right size. … read more
Jack
Jack
technician
factory trained engineer
2,159 satisfied customers
I have a Sony XBR65900C 4K Tv that has a blinking red
I have a Sony XBR65900C 4K Tv that has a blinking red lighting 4times and is in responsive What steps do I need to make it right . … read more
p0llinate
p0llinate
Bachelors of Science
14 satisfied customers
Our Sony Bravia tv through Apple tv displays the screen
Our Sony Bravia tv through Apple tv displays the screen perfectly, but when it is on Cable (Comcast) we see a narrow picture on either side of a big blank screen????? … read more
Jack
Jack
technician
factory trained engineer
2,159 satisfied customers
Cuts off and blinks red next to start button. 737 series 15
Had service man 2 yrs ago for little white dots in tv. He said I was clocking 28,000 hrs… read more
Aric
Aric
Technician
45,327 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x