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 Rod Your Own Question

Rod
Rod, TV & Communications Sys Repair
Category: TV
Satisfied Customers: 4497
Experience:  FCC Commercial License, Previous owner of Electronics Repair shop, 40+ years in electronic systems.
Type Your TV Question Here...
Rod is online now
A new question is answered every 9 seconds

I have a sony KDF50E2000 tv. When I turn it on, the Power Light

Resolved Question:

I have a sony KDF50E2000 tv. When I turn it on, the Power Light flashes 4 times. I have been told this means a fan needs replacing. I have also been told there is more than one fan, and a tv repairman would need to discover which one. I understand it is not as easy as replacing a lamp. Does this have to done by a TV repair man? What would be the cost of the part, and what should I expect as the overall cost?
Submitted: 3 years ago.
Category: TV
Expert:  Joe Gillette replied 3 years ago.
you could replace both fans for less than a tv repair man but only need to buy one fan replace one and if you still have code replace the other with the one you just took out
Customer: replied 3 years ago.
How many fans does this particular model have? I have been told by one repairman, who is unfmiliar with Sony models, that it has four. Do you know for sure how many, and are they all the same? How hard would it be for a laymen like myself to replace the fans?
Expert:  Joe Gillette replied 3 years ago.

there is 2 ,11 volt fans and 2, 21 volt fans they are not all bad do you you have a volt meter or would you be able to g o to Walmart and get one for 10 dollars

Customer: replied 3 years ago.
I don't have one, but will get one. What do I need to do?
Expert:  Joe Gillette replied 3 years ago.
check voltages at the wires of the fans see if the voltage is there to run them it will shut down so probably have turn on check one then repeat process untill go through them all set meter to dc voltage and one wire will be ground and other will be source wire .thats where you want to check your voltage.also you can unplug each fan one at a time see if tv comes on that would be fan putting it in shut down

Edited by Joe Gillette on 9/1/2010 at 9:48 PM EST
Customer: replied 3 years ago.

Ok.

1. Is there any trick to getting into the back of these TVs, or is it just a matter of finding all the screws?

 

2. Will ground wire be a specific color code?

 

3. Just to clarify, if I unplug the bad fan, the TV will turn on, but i need to replace the fan to prevent the TV from overheating?

Expert:  Joe Gillette replied 3 years ago.
yes you will need to shut it down and replace fan. on the back besides screws yes just find them all have little arrows but on coax there will be little nut and if that one has computer monitor input will need to remove the lock nuts on that then you see fan units
Expert:  Rod replied 3 years ago.

Hi,


 


I only remember two fans on this unit, but the reason is, the fan that causes the most problems is the lamp fan. Its a squirrel fan that sets on the lamp housing and one on the back of the TV. The most common failure is the lamp fan. Here is an illustration of the fans I am familiar with.


 


The back fan is easy to replace, but the lamp fan, requires a lot of caution - as you need to remove some housing and connections to get to the fan - you can damage the TV more.


 


If you want some detailed instructions, I can provide them. But a repair cost would run about $300, mostly labor - unless its the cabinet fan.


 


Thanks,


Rod


 

Customer: replied 3 years ago.
Rod, the top picture is exactly what my lamp fan looks like. I need tv for dummies explanation on exactly how to test this fan to see if it is the bad one, and then removal/replacement.
Expert:  Rod replied 3 years ago.
Hi Customer,

The fans are checked on the G board (power board) connectors for proper voltage and/or protection voltage. I've attached a document here - with the fan check flow chart and instructions on how to access the G board and a picture of the G board with the connector points for testing.

Thanks,
Rod
Customer: replied 3 years ago.
Surely that test that there is power from the G board, but how do I test to find which fan is bad. Which side of the board do I test, and if it is the component side do i need to remove the G board as illustrated. I would also appreciate you telling me exactly where i need to to place the positive and negative probes of the volt meter?
Expert:  Rod replied 3 years ago.
Hi,

You do not need to remove the boards to test for the faulty fan. You measure the voltage on the connectors that go to the fans on the G-board. The negative probe (black) of the Digital Multimeter can go to one of the screws that holds the board down. Use the positive probe tip and insert it into the top of the connector. For the fan voltage you should see 5-7vdc. Then you also need to check to see if the protection is enabled - this should be a yellow wire into the same connector. If protection is enabled, it will measure about 3Vdc, if protection is not enabled - it should read 0 Vdc. If you see a protection voltage, that means that is the faulty fan - ensure you measure the correct pin and not the fan supply voltage.

To help you better, I've attached some illustrations here.

Thanks,
Rod
Customer: replied 3 years ago.
Sorry..one final question I hope. Forgive me for being completely clueless whn it comes to things electronic. What is the trick to removing this wire/white plastic connectors to the mother board so I can check the pts. I cant seem to remove them. I notice a white clip on the side. Does this have to be depressed or opened up. Thank you for being so patient. You have been a great help so far.
Expert:  Rod replied 3 years ago.
Hi Customer,

You can remove the clip, but you shouldn't to check the voltage and to see if the protection voltage is enabled. You check it by using the positive lead of the VOM and place the tip firmly (but not shove) into the top of the connector. If the tip of your lead is not small enough - use a paper clip with an alligator jumper to the VOM lead, and direct/hold the paper clip with the plastic covering on the alligator clip.

To remove the plastic connector - you press the clip and gently pull the connector up.

Thanks,
Rod
Rod, TV & Communications Sys Repair
Category: TV
Satisfied Customers: 4497
Experience: FCC Commercial License, Previous owner of Electronics Repair shop, 40+ years in electronic systems.
Rod and 5 other TV Specialists are ready to help you
Customer: replied 3 years ago.
Thanks for all your help. I think I can do that with Fans 3 and 4, because of the larger connection. I'll have to get alligator clips and a use the paper clip method. The other two are very small and i dont know how i could possibly check those.
Expert:  Rod replied 3 years ago.
Hi Customer,

You can use the paper clip trick, even with the small connectors (use a "regular" paper clip - not the over sized ones). The plastic will give a little at the top of the connector. If you feel uncomfortable trying this, then pull the connector up slightly - to expose the connector pins near the circuit board mount - the connector must still make contact. You can measure at the exposed bottom portion of the pins. You must be careful not to short your probe/paper clip against two pins.

No need to accept again, since you already have.

Thanks,
Rod

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)