TV

Facing TV Problems? Ask a TV Technician.

Ask an Expert,
Get an Answer ASAP!

TV

I have a 46" Samsung LCD TV, Model Code LN T4669FX/XAA.

Customer Question
Hi Jack, I have a 46"...
Hi Jack,
I have a 46" Samsung LCD TV, Model Code LN T4669FX/XAA. About 8 years ago I replaced the two 2200uf caps on the BN44-00168B SIP460A SAMSUNG Power Supply, LNT4661FX/XAA LE46S86BDX/XEU.
Starting last year when turned, on it would present a varying light/dark gray
mottled screen. After several off/on attempts, it would work properly. I started leaving it turned on 24/7 and that worked for a few months.
Recently, there were green streaks horizontally and would turn off and on for a couple of seconds. There were repeated sound interruptions requiring off/on switching. Last week when turned, I got a momentary picture, green screen, no sound, and off.
I pulled the power supply board, figuring the replacement caps had died again. They appeared fine, with no sign of defect. I visually inspected the PS board with no obvious defects.
I considered buying a new PS, but I prefer to find the problem before moving on. I also inspected the other 2 boards, but nothing was obvious.
Thanks in advance,
Bill
Submitted: 1 year ago.Category: TV
Show More
Show Less
Ask Your Own TV Question
Answered in 3 minutes by:
6/27/2016
TV Technician: Jack, Technician replied 1 year ago
Jack
Jack, Technician
Category: TV
Satisfied Customers: 10,306
Experience: 40 years experience as audio,video repair and installation tech
Verified

Hi and thanks for the request

Ask Your Own TV Question
TV Technician: Jack, Technician replied 1 year ago

Those arre certainly signs of a defective power supply and yes it could be still caused by bad capacitors .

I mean considering the age of the tv , it is ripe for it and they do not always show signs of defect like that round op , it is just a sure sign of defect

Is the tv turning on at all now ?

Ask Your Own TV Question
TV Technician: Jack, Technician replied 1 year ago

By the way , you could try this capacitor kit for $14 and that would tell you if the capacitors are the problem

http://lcdalternatives.com/Samsung-LN-T4669F-IP321135A-LCD-TV-Replacement-Capacitors-Board-not-Included-P4879351.aspx

Ask Your Own TV Question
TV Technician: Jack, Technician replied 1 year ago

Only thing that bothers me here are those green horizontal streak so if you could get to see them again , open the tv`s own menu to see if it covers them or you can still see them over the menu ?

Ask Your Own TV Question
TV Technician: Jack, Technician replied 1 year ago

Anything horizontal on the screen is not caused by the t-con and if it shows over the menu then its not in the signal from the main board either , the menu supersedes that signal and in that case the only thing left is the lcd panel itself

Ask Your Own TV Question
TV Technician: Jack, Technician replied 1 year ago

Other than that the problems that clear themselves after warm up usually come from poor filtering (caps) from the power board although some of those voltages and sub voltages are located on the main board as well but that cap kit would tell you that .

Right now you could have compounded problems and it would not be rare for a tv of that age

Ask Your Own TV Question
TV Technician: Jack, Technician replied 1 year ago

Try the capacitor kit and that will tell you where to go next if that doesn`t clear everything , I mean that for $14 it certainly is cheaper than buying a new power board just for a try !

Let me know if you have other questions and if not for now then please do not forget to rate by clicking on the star icons at the top, then click on Submit so i get paid for my time helping you .
Also note that the rating does not close this post , you can come back at any time if you have questions or need help at a later time
Thank you

Ask Your Own TV Question
Customer reply replied 1 year ago
1. TV is off and apart.
2. Originally only replaced the 2 obviously bad caps, still look good.
3. Have 2 caps delivered today.
4. I guess I should install new caps and power up to see if I have a working screen.
5. The voltages I should check before closing are located where?
6. If it works and still has green lines, we can try the menu.I'll get back to you when up and running, today or Tue.
Thanks
TV Technician: Jack, Technician replied 1 year ago

No problem but that kit would`ve been the best try

Ask Your Own TV Question
TV Technician: Jack, Technician replied 1 year ago

let me know

Ask Your Own TV Question
Customer reply replied 1 year ago
Will do and is my communication clear and useful?It might be easier on the phone at the menu stage, if we get there.Back to you soon.
Customer reply replied 1 year ago
When I replaced the original 2 caps, I got good info online and You Tube. Some folks replaced more than 2 caps, usually 3 were bad. My TV worked well for all this time, the 2 fixed it.(NNRN).......No need to respond now, later if needed.Jack, I don't wish to waste your time.
TV Technician: Jack, Technician replied 1 year ago

Sorry had to step out for a bit.

You`re not wasting my time a bit , everything is fine

Phone wont do much good and if you received a phone offer it was automated from the web site ,not from me

Start with those and see if there are any improve. but mainly try to get it toturn back on and look at those lines and the menu , that's the first thing to do .

If your panel is defective then no need to waste time with the rest

Ask Your Own TV Question
Customer reply replied 1 year ago
What do you think of the power panels sold online? http://www.ebay.com/itm/371625107168?rmvSB=true
Are there any voltages I can check on the power panel when powered up, to determine if it's OK? If so and it is OK, that may indicated the other panel is the problem.
TV Technician: Jack, Technician replied 1 year ago

Talking about the LCD panel , the screen

Ask Your Own TV Question
TV Technician: Jack, Technician replied 1 year ago

That power board is so cheap , almost not worth trying to fix yours

Ask Your Own TV Question
Customer reply replied 1 year ago
if we can determine it's the power board, I would replace it. I'll change the 2 caps and get back to you.Again, are there any voltage points I can check, 5 or 3.5 volts?
TV Technician: Jack, Technician replied 1 year ago

Your best tester is replacing those unless you have an oscilloscope handy to check the ripple on the DC lines

Ask Your Own TV Question
TV Technician: Jack, Technician replied 1 year ago

Those voltages should be written next to the connectors , take a look

Ask Your Own TV Question
TV Technician: Jack, Technician replied 1 year ago

Next to connector CN801 on the power board , can you see the pinout voltages printed on the board ?

Those are your voltages

Ask Your Own TV Question
Ask Jack Your Own Question
Jack
Jack
Jack, Technician
Category: TV
Satisfied Customers: 10,306
10,306 Satisfied Customers
Experience: 40 years experience as audio,video repair and installation tech

Jack 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
I have a TV Model LCD-24xXR10F. The Screen Saver has come on
I have a TV Model LCD-24xXR10F. The Screen Saver has come on so I need to disable it … read more
Richard
Richard
IT Manager
IT Manager, Consultant
3,278 satisfied customers
What does / did the controller look like? Sony Bravia LCD
The quick Setup Guide (the only thing that I can find) says 2009 … read more
Shahid
Shahid
Owner of Repair Shop
High School or GED
3,497 satisfied customers
I have inherited a grundig Freeview digital TFT lcd tv and
I have inherited a grundig Freeview digital TFT lcd tv and need an appriopriate indoor aerial. My mother previously had it on a main outdoor aerial but this is not possible in our house. Could you ple… read more
p0llinate
p0llinate
Bachelors of Science
14 satisfied customers
I have a samsung lcd, model number ln40b530p7nxza and serial
I have a samsung lcd, model number ln40b530p7nxza and serial number b4x53css505489e and version is cno2. When i turn it on the picture is fine then in about 5-10 seconds, the screen fades almost to a … read more
Shahid
Shahid
Owner of Repair Shop
High School or GED
3,497 satisfied customers
Need power cord for my Philips lcd tv model #20pf5120 serial
need power cord for my Philips lcd tv model #20pf5120 serial #bz1a0617186360 … read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
13,653 satisfied customers
I have a Panasonic LCD #TC-32LX70 connected to ATT cable
I have a Panasonic LCD #TC-32LX70 connected to ATT cable input and a child was playing with the bottons on the top and now the only I can see is SNOW oll over the screen What can do to get may regular… read more
Shahid
Shahid
Owner of Repair Shop
High School or GED
3,497 satisfied customers
My Sharp Aquos 40 inch LED LCD TV LC40LE700X purchased
my Sharp Aquos 40 inch LED LCD TV LC40LE700X purchased January 2010 - going great guns! - can I get captions on it - as my hearing is starting to fail??? - thanks Jean.... … read more
p0llinate
p0llinate
Bachelors of Science
14 satisfied customers
I have a TC-L47E50 LCD tv that won't power on. The power
I have a TC-L47E50 LCD tv that won't power on. The power light is blinking 10 times. … read more
Electrotech2017
Electrotech2017
Audio and Video Technician
Vocational, Technical or Trade School
102 satisfied customers
With Samsung 42 LN-T4061F LCD TV, what is best way to conne
With Samsung 42" LN-T4061F LCD TV, what is best way to connect laptop to display internet? (Have HP Pavillion DV2500, with wireless). Can I do this with a wireless or bluetooth connection? /Sam Lamb, … read more
Mike6708
Mike6708
Enrolled in associates degree
579 satisfied customers
Samsung LNS4095 LCD TV. The screen just went black. It
Samsung LNS4095 LCD TV. The screen just went black. It appears that a light comes on but I have n picture … read more
p0llinate
p0llinate
Bachelors of Science
14 satisfied customers
I need a sharp tv LC26DV22U LCD HDTV /w built in DVDplayer/
I need a sharp tv LC26DV22U LCD HDTV /w built in DVDplayer/ LCDTV … read more
Jack
Jack
Technician
10,306 satisfied customers
No low voltage on the power board. LG 50" lcd. All sources,
all sources, the red light comes on and I removed the board after checking the cable connection to the main board, no 12v or 24v out put … read more
Jack
Jack
Technician
10,306 satisfied customers
My tc-l55et5 lcd. Panasonic is not turning on. Red led comes
My tc-l55et5 lcd. Panasonic is not turning on. Red led comes on but won't turn off until unplugged … read more
info tech
info tech
Self Employed
Vocational, Technical or Trade Scho
321 satisfied customers
My Haier Lcd tv will not turn on. There is no power light at
My Haier Lcd tv will not turn on. There is no power light at all even with the tv pluged in.… read more
Tim Nolan
Tim Nolan
TV Repair Center Owner
Associate Degree
17,254 satisfied customers
It is an LCD from 2008 or so. It is zoomed in and I cannot
It is an LCD from 2008 or so. It is zoomed in and I cannot get it right … read more
Richard
Richard
IT Manager
IT Manager, Consultant
3,278 satisfied customers
It simply will not turn on. Insignia lcd. this is the first
insignia lcd. this is the first time but it has been out for awhile. I'm just now getting to it. … read more
p0llinate
p0llinate
Bachelors of Science
14 satisfied customers
Looking for 55UH8500 LCD panel replacement instructions. ^^
Looking for 55UH8500 LCD panel replacement instructions … read more
Suhasini Velu
Suhasini Velu
Bachelor of Engineering
142 satisfied customers
Panasonic lcd. darker shadow over center of screen.
Panasonic lcd. darker shadow over center of screen … read more
Electrotech2017
Electrotech2017
Audio and Video Technician
Vocational, Technical or Trade School
102 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