How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Frank the tv man Your Own Question
Frank the tv man
Frank the tv man, Technician
Category: TV
Satisfied Customers: 1028
Experience:  15 years of TV repair experience
41615543
Type Your TV Question Here...
Frank the tv man is online now
A new question is answered every 9 seconds

Samsung LCD TV screen goes black

This answer was rated:
star-full

I have a Samsung 1080p 46-in LCD TV.  The TV always turns on without a problem, but sometimes after 30 seconds and sometimes after two hours, the screen goes black. There is still audio, and you can still change the channel, but there is no picture. Given the rather well-known capacitor issue on Samsung TVs (albeit for a different failure mode), I removed the back cover, found an electrolytic capacitor that was indeed damaged, replaced it, but still had the issue with the screen going black. If anyone is familiar with this issue and can offer some technical advice, it would be greatly appreciated!

---Another note - when the screen goes "black" you can just BARELY make out that the image is still on the screen, but it's black on black.

The backlight on your TV is shutting off. This is most likely due to a defective inverter but can also be a defective LCD panel. The inverter is the most likely culprit. There are several different inveter so be sure to get the right one. If you give me the serial number or version number I might be able to tell you which one backlight inverter is in your TV but you can also go by the sticker on the board. Here is a link where you can purchase the inverter once again make sure to get the right one.

http://www.shopjimmy.com/catalogsearch/result/?q=LN46A650A1F
Customer: replied 4 years ago.
Very good, thank you for the information!

As one last attempt at a fix, I tried reflowing all the solder joints on the inverter boards, but to no avail.

I ordered new boards online, and I'll see if that fixes the problem.

I had one with a cold solder joint a few months ago.

Frank the tv man, Technician
Category: TV
Satisfied Customers: 1028
Experience: 15 years of TV repair experience
Frank the tv man and other TV Specialists are ready to help you

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. VM United States
< Previous | Next >
  • 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. VM United 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. Windy USA
  • 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!!!! Alex Los 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. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, 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. Esther Woodstock, NY
 
 
 

Meet The Experts:

 
 
 
  • Louie

    Louie

    Technician

    Satisfied Customers:

    2557
    25+ yrs. experience in the field and 5+ yrs. online, down to component level.
< Last | Next >
  • http://ww2.justanswer.com/uploads/benimur/2009-03-29_003401_id_2.jpg Louie's Avatar

    Louie

    Technician

    Satisfied Customers:

    2557
    25+ yrs. experience in the field and 5+ yrs. online, down to component level.
  • http://ww2.justanswer.com/uploads/OR/OriginalSeadog/2011-7-22_191917_ProfilePicture.64x64.jpg Rod's Avatar

    Rod

    TV & Communications Sys Repair

    Satisfied Customers:

    2355
    FCC Commercial License, Previous owner of Electronics Repair shop, 40+ years in electronic systems.
  • http://ww2.justanswer.com/uploads/IT/ITPeter/2011-5-3_23187_Pete.64x64.JPG Pete's Avatar

    Pete

    Electronic Engineer

    Satisfied Customers:

    1624
    Over 16 years of experience installing and repairing electronics.
  • http://ww2.justanswer.com/uploads/ST/steven.benoit/2011-4-1_194735_untitled1.64x64.jpg Steven's Avatar

    Steven

    Technician

    Satisfied Customers:

    1417
    Ma. Master Technician Lic. Authorized Warranty Support.
  • http://ww2.justanswer.com/uploads/europro/2009-7-31_232635_DSC02497.JPG euro-pro llc's Avatar

    euro-pro llc

    Technician

    Satisfied Customers:

    1128
    20 years in TV repair,certified by all major brands- Sony,Samsung, LG,Toshiba, Panasonic, RCA,
  • http://ww2.justanswer.com/uploads/SI/SiliconSavant/2012-6-27_192716_201264172651profile.64x64.jpg.64x64.png Daniel's Avatar

    Daniel

    Electrical Engineer

    Satisfied Customers:

    1072
    BSEE (Electrical Engineer), 10+ years electronic design experience ,chip, board, component expert
  • http://ww2.justanswer.com/uploads/mistersony/2010-12-13_235638_conrad2.jpg Conrad's Avatar

    Conrad

    Technician

    Satisfied Customers:

    946
    Training on many types of consumer electronics, training on Sony Samsung and JVC