TV

Facing TV Problems? Ask a TV Technician.

Ask an Expert,
Get an Answer ASAP!

I have a Sony KDL-46EX400. After being off overnight, it…

Customer Question
I have a Sony KDL-46EX400...
I have a Sony KDL-46EX400. After being off overnight, it will come on and play fine for half an hour or so then shut of like it was turned off. If you unplug and wait a few minuets it will turn back on and play for a few minuets and shuts off much faster.
Submitted: 2 years ago.Category: TV
Show More
Show Less
Ask Your Own TV Question
Answered in 4 hours by:
2/27/2016
TV Technician: Michael Hannigan, Technician replied 2 years ago
Michael Hannigan
Michael Hannigan, Technician
Category: TV
Satisfied Customers: 11,888
Experience: 25+ Years Experience in Computers and Electronics
Verified

Hello. Thank you for coming to JustAnswer.

Sorry for the wait. My name is Michael. I will be helping you with your question today.

Please let me know if there as any additional information that you think might be pertinent to your question. If not, I'll provide the best answer I can based on the information you've provided. You can always reply with additional information or questions at any point during our conversation, and I'll be happy to continue helping.

Ask Your Own TV Question
TV Technician: Michael Hannigan, Technician replied 2 years ago

The first thing I did for you was uploaed the service manual so you can download that and have something to work from. You can download the service manual at the following link:

http://www.brainchamber.com/downloads/sony-kdl-46ex400-service-manual-az1-k-chassis/

Initially, I would open the TV and do a visual inspection of all capacitors - make sure there are no bulging or leaking capacitors. Failing capacitors can cause exactly what you describe. If so, then simply replacing them will be sufficient. Ohterwise, follow the troubleshooting procedures in the PDF to diagnose.

Mike

Ask Your Own TV Question
Customer reply replied 2 years ago

Hi Mike,

Sorry, I just got back in town. I get a 4 blink error code when the TV shuts down. The error stored in memory is 4, balancer. I have measured resistance on all transformers on the inverter board and all measure the same. Last time it ran for 5 hrs before shutdown, since only seconds. When the TV shuts down the PS_On voltage stays at 3.0V.

Thanks,

TV Technician: Michael Hannigan, Technician replied 2 years ago

The balance error indicates that the LEDs are not balanced, and either they are failing, or more likely, the LED driver board.

I would replace the LED driver board.

Mike

Ask Your Own TV Question
Customer reply replied 2 years ago

Hi,

Thanks for the reply, but this set has ccfl lamps. I lit all lamps individually with a lamp tester and all lit brightly. As I mentioned above I checked resistance on all transformers on the inverter board and all checked the same. The high voltage transformer for the inverter is located on the power board. I suspect one of these boards. The error says balancer or panel, but I don't know where the error detect line is generated.

Thanks

I still haven't received an appropriate answer to my last response!

TV Technician: Michael Hannigan, Technician replied 2 years ago

The balance error applies to CFLs as well.

You would have to be measuring it at the exact time that it shuts down to see the change.

Did you not get the service manual I uploaded for you?

Ask Your Own TV Question
Customer reply replied 2 years ago

yes, I got the service manual.

TV Technician: Michael Hannigan, Technician replied 2 years ago

Ok... in the service manual is the schematic. The inverter are down by the power supply. You are correct that the error refers to the panel, but this isn't usually the case in reality. It's directly related to the back-lighting. If it detects a change in the voltage or resistance, it will give this error and shut it down.

Ask Your Own TV Question
Customer reply replied 2 years ago

Ok, The power board/inverter supplies the high voltage to the inverter board witch connects to the ccfl lamps inside the panel. When the error occurs the 3.3 V backlight on drops off and the backlight err goes up to 3.3V. The Power_on line stays at 3.0V, or sometimes drops off to 0.V, or sometimes the TV reboots. My question is it the power/inverter board, the inverter board, or the ccfl lamps? I ordered and received a new inverter board today per your response, and it didn't help.

TV Technician: Michael Hannigan, Technician replied 2 years ago

It's usually the inverter or driver board. But it CAN be the lamps - if the lamp fails, the backlight err goes up and triggers the balance error. The basic meaning of the balance error is that there is an imbalance among the back-lights. I originally referred to LEDs by mistake - in that case, they are just LED strips. In this case, the same thing is true, but with the CCFLs.

Ask Your Own TV Question
Customer reply replied 2 years ago

What about the high voltage transformer circuit on the power board that feeds the inverter board? Wouldn't a failure there trigger and error also? How do I proceed?

Was this answer helpful?
Ask Michael Hannigan Your Own Question
Michael Hannigan
Michael Hannigan
Michael Hannigan, Technician
Category: TV
Satisfied Customers: 11,888
11,888 Satisfied Customers
Experience: 25+ Years Experience in Computers and Electronics

Michael Hannigan is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

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.

VMUnited 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.

WindyUSA

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!!!!

AlexLos 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.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, 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.

EstherWoodstock, NY

< Previous | Next >

Meet the Experts:

Louie

Louie

Technician

2,950 satisfied customers

25+ yrs. experience in the field and 5+ yrs. online, down to component level.

Rod

Rod

TV & Communications Sys Repair

2,355 satisfied customers

FCC Commercial License, Previous owner of Electronics Repair shop, 40+ years in electronic systems.

Steven

Steven

Technician

1,429 satisfied customers

Ma. Master Technician Lic. Authorized Warranty Support.

euro-pro llc

euro-pro llc

Technician

1,128 satisfied customers

20 years in TV repair,certified by all major brands- Sony,Samsung, LG,Toshiba, Panasonic, RCA,

Daniel

Daniel

Electrical Engineer

1,072 satisfied customers

BSEE (Electrical Engineer), 10+ years electronic design experience ,chip, board, component expert

Conrad

Conrad

Technician

946 satisfied customers

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

Neil

Neil

Technician

803 satisfied customers

More than 10 years experience repairing TV's and electronics equipment.

< Previous | Next >

Related TV Questions
Hello, I have a Panasonic viera TC-P42S30 that will not turn
Hello, I have a Panasonic viera TC-P42S30 that will not turn on and is giving me 14 blinks as the fault code. Can someone give me some guidance.… read more
Anthony F.
Anthony F.
Owner
High School or GED
70 satisfied customers
Sharp Aquos LC-40LE81OUN. Blank screen with a blinking white
Sharp Aquos LC-40LE81OUN. Blank screen with a blinking white LED chevron bottom center. Seems to be a 1-1-5 flashing sequence or a 2-5. Not sure how Sharp codes are designed.… read more
Dan T.
Dan T.
Calibration and Repair Center Supervisor
Associate Degree
5,680 satisfied customers
Samsung S50FH-YB10 flat screen TV wont turn on. Red light
Samsung S50FH-YB10 flat screen TV won't turn on. Red light just flashes slowly.… read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
13,664 satisfied customers
I have a Lorex LH160 ECO6 series DVR with five cameras
Hello Pearl, my name is***** have a Lorex LH160 ECO6 series DVR with five cameras attached. The system has run without problems for the past four years. And with no warning it has completely shut down… read more
Neil
Neil
Associate Degree
2,630 satisfied customers
I have a Samsung tv model un65js 9500 fxza. has black screen
I have a Samsung tv model un65js 9500 fxza. has black screen and no sound. I am a tech and need to know how and where to measure t con , power and inverter boardalong with led back light assessment to… read more
Sam Dennis Bradley
Sam Dennis Bradley
owner
Vocational, Technical or Trade School
59 satisfied customers
The tv wont turn on. Directly to an outlet. Right now the
yes, right now the back is removed, I have replaced the X & Y main, power board and logic board … read more
Dan T.
Dan T.
Calibration and Repair Center Supervisor
Associate Degree
5,680 satisfied customers
SONY KDL- 37 EX 725 power G10 APS 313 No Power led! stby =
SONY KDL- 37 EX 725power G10 APS 313No Power led! stby = NoC6110 311v c6401 12,58v c6128 14v c6557 15,53v c6551 15,53v Q6304 316v r6301 316v Ic6351 1=316v 3-6 0v D6407 12v D6408 12v cn 6704 5=3,3v aus… read more
Pete
Pete
Engineer
Bachelor\u0027s Degree
1,130 satisfied customers
I have an lg50uh5530 when u turn it on the screen will flash
I have an lg50uh5530 when u turn it on the screen will flash for a second then go black then the standby light flashes 3 times … read more
Dan T.
Dan T.
Calibration and Repair Center Supervisor
Associate Degree
5,680 satisfied customers
We had a power outage at home yesterday and now my Hitachi
we had a power outage at home yesterday and now my Hitachi 42HDT79 … read more
Dan T.
Dan T.
Calibration and Repair Center Supervisor
Associate Degree
5,680 satisfied customers
I HAVE A SHARP 32" TV MODEL #LC 32D 43U THAT JUST STOPPED
I HAVE A SHARP 32" TV MODEL #LC 32D 43U THAT JUST STOPPED WORKING - IT SEEMS TO BE GETTING POWER EVERYWHERE EXCEPT AT THE POWER ON /OFF SWITCH - AT P151 CONNECTOR THE PART # LC-32D 43U . HAVE SAME MOD… read more
Dan T.
Dan T.
Calibration and Repair Center Supervisor
Associate Degree
5,680 satisfied customers
I have a 60 plasma lg screen turns on very dim snow then
I have a 60 plasma lg screen turns on very dim snow then turns to black screen then powers off all within 30 seconds..the red light goes out during whole time and it clicks then shuts off please help.… read more
Dan T.
Dan T.
Calibration and Repair Center Supervisor
Associate Degree
5,680 satisfied customers
I have a LG TV that measures 35" side to side and probably
I have a LG TV that measures 35" side to side and probably 38" diagonally. … read more
Jack
Jack
technician
factory trained engineer
2,163 satisfied customers
The TV works fine however, the inside measurment of the
The TV works fine however, the inside measurment of the screen is 15 inches but the pictture top to bottom is only 12 inches. The side to side measure is ok as it reaces right to the frame edges. … read more
p0llinate
p0llinate
Bachelors of Science
14 satisfied customers
I have a toshiba television model 42TL515U. The TV will not
I have a toshiba television model 42TL515U. The TV will not turn on but there is a relay swtch that clicks when the TV is plugged in. My guess is that it is a capacitor issue but not sure? If so can I… read more
Dan T.
Dan T.
Calibration and Repair Center Supervisor
Associate Degree
5,680 satisfied customers
My LG tv (55LM7600) wont turn on. Red light in the corner
My LG tv (55LM7600) won't turn on. Red light in the corner flashes 3 times and repeats. I replaced power board but still same issue.… read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
13,664 satisfied customers
How do I test BN44-00175A Samsung Power supply. Should I
How do I test BN44-00175A Samsung Power supply. Should I have the Vs and Va voltages present with no cables connected to the power supply? If I turn on the Power supply and operate it alone with-out a… read more
Dan T.
Dan T.
Calibration and Repair Center Supervisor
Associate Degree
5,680 satisfied customers
the power button on my samsung tv is not working, do you know
the power button on my samsung tv is not working, do you know how to fix it?… read more
Steven
Steven
Technician
Vocational, Technical or Trade Scho
1,429 satisfied customers
my coby tv will not turn on. The blue stand by light is on
my coby tv will not turn on. The blue stand by light is on but tv will not fully power up.… read more
Louie
Louie
Technician
Associate Degree
2,950 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x