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 Josh C Your Own Question

Josh C
Josh C, Technician
Category: TV
Satisfied Customers: 1055
Experience:  I have been an electronics technician for 17 years, Tv's VCR's, DVD players, home and car audio.
11634809
Type Your TV Question Here...
Josh C is online now
A new question is answered every 9 seconds

I have a Mitsubishi Medallion HD 1080 series Big Screen TV.

Customer Question

I have a Mitsubishi Medallion HD 1080 series Big Screen TV. For the last week, it has periodic problems with the red being off focus. It will sometimes return to a good, clear picture on its own, or with a bump on the side of the TV. Also, it will sometimes shut itself off before turning on completely.That is, you push the power button, the light comes on, and sometimes you hear the screen coming to life, but then the light goes off. It sometimes will take five minutes to get it to stay on. Are the two problems related?
Submitted: 5 years ago.
Category: TV
Expert:  Josh C replied 5 years ago.
Welcome Ben!

Thanks for choosing JA!

I need a bit of information before we continue: <br /><br />What id the model # XXXXX the TV?

Are you familliar with Electronics repair at all, and can you solder, or do you know someone that can?

when the red goes off, does it look sort of like this?

http://i98.photobucket.com/albums/l262/toyotaman89/ebay%20and%20junk/mitsu-tv1.jpg

I noticed you said the tv will straighten up when "bumped" this is good!

Get back to me and we will go from there..
Customer: replied 5 years ago.

Model #55411.

 

I am not familiar with electronics, and cannot solder. I may know someone who can.

 

No, it doesn't look like the link you sent. The reds are not lined up with other things, they sometimes shimmer, but nothing is curved as in the link.

Expert:  Josh C replied 5 years ago.
Ok, that sounds encouraging!

If you are capable, It sounds like the convergence section of your tv has developed some ring cracks around the solder joints on the Convergence IC's and possibly the Resistors.. This is a repair any competent tv repair person should be able to complete, and would usually cost 200-300 dollars.

If you can find someone who can solder, I can give them specific instructions!

The convergence I.C.'s are what "control" the picture..These IC's operate at a very high temp, and usually only last 4-5 years.

If you remove the back of the set, you will want to look for the BIGGEST heatsink in there - it will lok like a large aluminum block with fins, on that heatsink, you will see 2 lage IC's , probably STK392-110, or STK392-120's or something to that effect...regardless - you can Remove the board they are mounted on, and using a Solder sucker, or solder wick, remove the old solder and re-solder all the connections on the I.C.'s

Once you resolder the I.C.'s, you should test all the large resistors near them.. pull one side of the resistor out of the board so you can check it out of circuit. they will usually have the value in Ohms, printed directly on the resistor, but you may have to use the resistor color code to find out what value they are....However, usually if there is any damage, the resistor will look like it has been HOT or fried. resolder the IC's and replace any bad resistors, and you should be good to go. If you need to order a resistor or two,

http://servicemanuals.vstore.ca/index.php/cName/convergence-resistors


Hope that helps!
Customer: replied 5 years ago.
Will this solve the problem of the TV not coming on?
Expert:  Josh C replied 5 years ago.
I cannot gaurantee it, but It should, because I believe what is happening is the TV is turning off to protect the convergence section when it "sees" an open circuit.
Customer: replied 5 years ago.
Sorry, but this answer is far too technical for me to know whether it's of value or not.
Expert:  Josh C replied 5 years ago.
Well, I cant really break it down into any simpler terms, If you have someone follow the instructions I posted, I know this will fix the tv - I have seen the same problem before in this particular set.

If you do not know anyone that can assist you with this, I would just suggest having a local shop perform the repair - for this type of repair you should be looking in the area of $200-$300.00 dollars I never charge more than $300 my self, even for in home service.

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)