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 Dan Your Own Question

Dan
Dan, Master Tech and Repair Facility Trainer
Category: TV
Satisfied Customers: 6985
Experience:  USAF trained; A.A.S Electronics; A.A.S. Education; Currently teaching advanced troubleshooting and repair for the DoD.
42300671
Type Your TV Question Here...
Dan is online now
A new question is answered every 9 seconds

I have a sanyo dp26649 LCD tv that has no picture or sound.

Resolved Question:

I have a sanyo dp26649 LCD tv that has no picture or sound. The green light comes on, but that's it. The output of the power board does have the 12 and 5 volts.
Submitted: 3 years ago.
Category: TV
Expert:  Dan replied 3 years ago.

Thanks for the question. My name is Dan.

1. Does the backlight come on?

2. Is the green light flashing?

Kindest regards,
Dan T.

Customer: replied 3 years ago.
The only indication that there is even power to the set is the green light. I do not get a back light and the green light is not blinking. It is stay on solid. There is no sound either. I have an electronics background and was hoping to fix this without taking it somewhere if possible.
Thanks,
Kevin
Expert:  Dan replied 3 years ago.

Kevin,


Check the 24VDC line going from the power supply to the inverter. Let me know.

Customer: replied 3 years ago.
Where is the 24 vdc line on this? The connector going from the p/s has markings for each wire. there is only 5 and 12 vdc marked.
Expert:  Dan replied 3 years ago.

Scratch that. Most of these Sanyo models have IP (inverter/power) boards... so there wouldn't be a separate line.

 

Are there any bulging or swollen capacitors on the power board? Pay particularly close attention to the tops... are any of them not totally flat?

Customer: replied 3 years ago.
I have looked closely at all the caps and they look totally normal. Also, I do not see any burn marks on either of the two boards. There is one obvious fuse at the AC input which is good. I can try to get pictures of the boards if that would help.
Expert:  Dan replied 3 years ago.

Turn the TV on, then hold a flashlight up to the screen and look for images, movement, etc. It would be very faint. You might also wish to make the room as dark as possible. Let me know.

Customer: replied 3 years ago.
I put the tv in a darker room, turned it on and used a flashlight to look for images or movement. I see nothing.
Expert:  Dan replied 3 years ago.

Ok, thanks. There are 3 possible issues here.


First, you could have a bad LCD panel. I don't think this is the case, and it would be pretty rare... but it's possible.

 

Second, you could have a bad power supply. This would also be unlikely since your standby line is good.

 

Last, and most likely, you probably have a bad main board. This is really the only thing that could cause your issues if the standby line is good.

 

The bad news is that Sanyo parts are notoriously hard to come by... and they're awfully expensive. Usually a bad main board is too expensive to be cost effective. If you want, though... get me the part number from the board and I'd be happy to see if any of my suppliers have one.

 

Dan

Dan, Master Tech and Repair Facility Trainer
Category: TV
Satisfied Customers: 6985
Experience: USAF trained; A.A.S Electronics; A.A.S. Education; Currently teaching advanced troubleshooting and repair for the DoD.
Dan and 2 other TV Specialists are ready to help you
Customer: replied 3 years ago.
Thank you for your response. The numbers on the main board are
1LG4B10Y04100
N7HK
Is it possible for a non-expert like me to buy this part if you are not able to find one?

Thanks,
Kevin

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)