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 Aric Your Own Question

Aric
Aric, Technician
Category: TV
Satisfied Customers: 34466
Experience:  10+ yrs. experience installing and repairing TVs and A/V systems. Owner of A/V installation and repair business.
24739752
Type Your TV Question Here...
Aric is online now
A new question is answered every 9 seconds

My screen occasionally boots up with 1/2 gray and 1/2 black.

Resolved Question:

My screen occasionally boots up with 1/2 gray and 1/2 black. It happened a couple times and when turn off and on it comes on normally. Today it won't.
Submitted: 1 year ago.
Category: TV
Expert:  Aric replied 1 year ago.
Hello and thank you for the question. How long have you owned the set for? Also what is connected to the set for devices ( cable box,DVD, etc.), and do you have the same issue regardless of which you're trying to watch?
Customer: replied 1 year ago.
I have a Direct TV receiver and blu ray player as inputs. The entire system will come on when activated but the TV only shows the half gray/black condition
Expert:  Aric replied 1 year ago.
Okay, what I was asking is IF the half grey/black condition also occurs when you try to watch the Blu Ray player?


We also need to know if the TV's MENU/HOME button (not the Direct TV remote), will bring up the MENU WHILE the problem is occurring?
Customer: replied 1 year ago.
The menu home button on the tv remote has a slight fading effect on the gray/ black screen. The blu ray has the same effect when activated.
Expert:  Aric replied 1 year ago.
Thank you.

I need to know how long you've owned the set for please?


Is there any buzz or hum coming from the screen when the issue occurs?


Also, as a test, when the issue is occurring, if you gently smack your open hand on the back of the TV, does the issue go away?

Lastly, are you looking to try and repair the set yourself (which will require component replacement), or are you looking for a diagnosis of what the problem could be and a repair estimate?

Customer: replied 1 year ago.
It's about 2 years old. I am able to get audio from the direct tv. The smack did not work
Expert:  Aric replied 1 year ago.



Unfortunately, this is not something that can be repaired via any resets or adjustments, and unfortunately the set will require service to correct it.

There are several possible causes for this problem. The power supply board is one- more specifically there are several capacitors on this board that are prone to going out of spec and can cause these problems you're having. Average cost to have the power supply replaced is around $350 parts and labor.

The other possible cause is the T-Con board. This is the LCD panel timing controller and processes all of the video before sending it to the panel. This is the most likely cause of the problem you're having and average cost to replace the T-Con on this set is around $350 parts and labor.

Lastly, there's a small possibility that the LCD panel is failing- although once the problem on your screen occurred, it would not likely be corrected by shutting the TV off and turning it back on- so this is the last on our list. If the LCD panel was the culprit, it is the only thing in the TV that is not repairable as the cost of a new panel is as much as the TV when new.

I wish I had better news or a quick fix today but the set does require component testing and replacement to allow it to operate normally again.

If you're like you can use the link below to locate a Tech in your area:

www.tvrepairpros.com

 

If you need further assistance let me know.

If you're satisfied with my service, please do not forget to rate me accordingly.

Customer: replied 1 year ago.
Id like to attempt the repair myself . Can you guide me through the isolation and confirmation of the problem?
Expert:  Aric replied 1 year ago.
Do you have a Multi-Meter John and experience measuring live voltages?
Customer: replied 1 year ago.
Yes. I have a Simpson 260 and understand how to use it. By the way it's working normally now after about a dozen attempts turning it on and off.
Expert:  Aric replied 1 year ago.

The first thing you would want to check for in the set, are the capacitors visually, making sure none are bulged, swollen or leaking fluid. The Power Supply is the board inside the TV that power cord directly attaches to.

Any that do not appear cylindrical, or are leaking you would take the rating (In uf), and the voltage off the cap (example: 2200 uf, 50 vdc), and cross reference them at the sites below:

http://www.digikey.com/




http://www.mouser.com/




They each solder into place with two leads, a positive and a negative. Make sure you solder the news ones in the same way, or they will explode when the TV is powered up.

Make sure you are careful not to un-solder any other adjacent circuit traces when removing the old caps, and carefully solder in the new ones allowing the solder to flow into the joint. Replace any and ALL caps that are questionable. Remember- when in doubt, change them out.


Try powering up the TV, and if the set operates normally, then you have solved the issue by replacing the faulty cap(s).


If it does not, then you would need to isolate which board is causing the problem by measuring the Power Supply Voltages.


Please only proceed if you have experience measuring live voltages on a circuit board level.

Use a DVM (Digital Volt Meter) set to DC volts, put the Black probe of the Meter on an RCA jack shield on the back of the TV, then use the Red probe and probe all of the Outputs for voltage (correct voltages will be stamped on the power supply at the outputs). Do this with NOTHING connected to the Power supply but AC power, the Mainboard, and the little board that houses the Power Switch. If a voltage is missing/ fluctuating, then the power board needs to be replaced.

If the power supply outputs its rated voltages, then connect the other boards one at a time until one causes it to shut down. This board would have the short causing the supply to SOS, and would need to be replaced.

A good source to locate replacement boards is http://www.shopjimmy.com/


and http://www.discountmerchant.com/




If you need further assistance let me know.

 

If you're satisfied with my service, please rate the answer accordingly.

Aric, Technician
Category: TV
Satisfied Customers: 34466
Experience: 10+ yrs. experience installing and repairing TVs and A/V systems. Owner of A/V installation and repair business.
Aric and 3 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
< Last | 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:

 
 
 
  • TV Tech1

    Technician

    Satisfied Customers:

    4800
    30 Years experience. Authorized Warranty servicer.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TV/TVTech1/2013-3-25_625_TECH1Nobanner.64x64.jpg TV Tech1's Avatar

    TV Tech1

    Technician

    Satisfied Customers:

    4800
    30 Years experience. Authorized Warranty servicer.
  • http://ww2.justanswer.com/uploads/OR/OriginalSeadog/2011-7-22_191917_ProfilePicture.64x64.jpg Rod's Avatar

    Rod

    TV & Communications Sys Repair

    Satisfied Customers:

    2354
    FCC Commercial License, Previous owner of Electronics Repair shop, 40+ years in electronic systems.
  • http://ww2.justanswer.com/uploads/benimur/2009-03-29_003401_id_2.jpg Louie's Avatar

    Louie

    Technician

    Satisfied Customers:

    2208
    25+ yrs. experience in the field and 3+ yrs. online, down to component level.
  • http://ww2.justanswer.com/uploads/P0/p0llinate/2011-4-27_174649_tucker.64x64.JPG Nathan's Avatar

    Nathan

    Installer

    Satisfied Customers:

    1683
    Custom home theater installer, authorized dealer top brands.
  • http://ww2.justanswer.com/uploads/ST/steven.benoit/2011-4-1_194735_untitled1.64x64.jpg Steven's Avatar

    Steven

    Technician

    Satisfied Customers:

    1366
    Ma. Master Technician Lic. Authorized Warranty Support.
  • http://ww2.justanswer.com/uploads/IT/ITPeter/2011-5-3_23187_Pete.64x64.JPG Pete's Avatar

    Pete

    Electronic Engineer

    Satisfied Customers:

    1260
    12+ years experience installing and repairing electronics.
  • http://ww2.justanswer.com/uploads/3G/3guk/2011-1-15_132320_D1SC01363.64x64.jpg James's Avatar

    James

    Technician

    Satisfied Customers:

    1154
    AV Service Engineer (4 Years)
 
 
 
Chat Now With A TV Technician
Aric
Aric
TV Technician
34466 Satisfied Customers
10+ yrs. experience installing and repairing TVs and A/V systems. Owner of A/V installation and repair business.