TV

Facing TV Problems? Ask a TV Technician.

Ask an Expert,
Get an Answer ASAP!

Philips 52pfl5704d/f7 LCD TV. Turns on and screen is slightly backlit,

Customer Question
but no actual display is...
Philips 52pfl5704d/f7 LCD TV. Turns on and screen is slightly backlit, but no actual display is present. "Philips" splash screen does not come up. No audio present. Removed back panel and measured 18V on all 24V pins that supply power to inverters. Does this mean power supply board is bad or should I test further before throwing parts at this TV?
Submitted: 2 years ago.Category: TV
Show More
Show Less
Ask Your Own TV Question
Answered in 9 hours by:
6/25/2015
TV Technician: Dimmu TV, Handyman/Handywoman replied 2 years ago
Dimmu TV
Dimmu TV, Handyman/Handywoman
Category: TV
Satisfied Customers: 18,413
Experience: 3 years experience
Verified
.
Hello my name is***** look forward to assisting and am very sorry to hear that you are having this problem. I want to warn you that it is possible you will need to replace a part in order to fix this. There are a few different things that can cause this and a couple different parts so we would need to troubleshoot to find out for sure. Does it beep or does the LED flash in a pattern?
.
Ask Your Own TV Question
Customer reply replied 2 years ago
No beeping, no flashing LED pattern. The LED on the front panel illuminates when powered on, along with the LED on the board that has all the input jacks on it (mainboard?)
TV Technician: Dimmu TV, Handyman/Handywoman replied 2 years ago
.
Yes that would be the main board, have you already looked for burnt/blown caps? The main board itself sounds like the most likely cause from what you are describing not the power supply.
.
Ask Your Own TV Question
Customer reply replied 2 years ago
Just verifying that the mainboard could potentially cause the output voltage from the power supply board (the one with the two large black capacitors) to drop to 18V instead of the rated 24V. Did not see any visibly blown or melted capacitors on the power supply board.
TV Technician: Dimmu TV, Handyman/Handywoman replied 2 years ago
.
Sort of, the low voltage can mean both the output as well as the input is shorted so it can be caused by either. The fact you aren't even seeing a logo on the screen and no beeps/led codes makes it more likely to be the main board in my opinion. With a bad power supply board you should normally have at least a blinking led code.
.
Ask Your Own TV Question
Customer reply replied 2 years ago
Would a bad T-Con board also typically result in beeps or a blinking LED code? You have most definitely been helpful so far; I just do not want to start throwing parts at this thing without ruling stuff out
TV Technician: Dimmu TV, Handyman/Handywoman replied 2 years ago
.
Everything should have an LED code. The codes however are stored and sent via the main board. So while possible for it to be something else it is much more likely to be the main board because of this. If you are worried (understandable) a lot of sellers on sites like eBay will let you return parts if they do not fix the problem just contact them first. You also may want to note it is possible for more than one board to be the issue, we can only find out by switching out the most likely. If this did not work, please come back and let me know what happened when you tried it by clicking on reply to expert so we can continue. If it did work, please don’t forget to leave a positive rating - it is greatly appreciated.
.
Ask Your Own TV Question
Customer reply replied 2 years ago
New mainboard is in, all connections are good. Press power button, power LED on front panel lights up, LED on mainboard lights up, lamps come on and make screen a grayish color, then black, then gray again, and once more to black. No Philips splash displayed. No LED codes. Any suggestions as to what I can check next?
TV Technician: Dimmu TV, Handyman/Handywoman replied 2 years ago
.
After this happens do the lights on the front stay on?
.
Ask Your Own TV Question
Customer reply replied 2 years ago
The white LED on the front panel stays on. Looking through the holes in the back of the TV, I can see that the lamps are on, but the screen is entirely black
TV Technician: Dimmu TV, Handyman/Handywoman replied 2 years ago
.
That is very odd, do you know how to test capacitors? That would be the best way to narrow it down now.
.
Ask Your Own TV Question
Customer reply replied 2 years ago
Capacitors tested ok but I swapped in an available known-good PSU board. Problem persists. Any way to properly test the T-CON board? I'm assuming that would be my next step, and then the master/slave boards?
TV Technician: Dimmu TV, Handyman/Handywoman replied 2 years ago
.
You tested the caps on the main board as well? T-con failures would normally display as shift and distortions rather than completely blank. As an example this would be a sign of a t-con issue:
http://3.bp.blogspot.com/-QlXzNc10Sdc/UchFbzhH7aI/AAAAAAAAz08/LIowMVEZkIg/s1600/tcon8.jpg
.
Ask Your Own TV Question
Customer reply replied 2 years ago
I have tested with two known good mainboards and PSU boards. No change in symptoms
TV Technician: Dimmu TV, Handyman/Handywoman replied 2 years ago
.
Thank you for clarifying that, we would indeed want to test the T-Con board next then if both of those are ruled out. You would want to test the caps on it the same way, specifically the 2200uf caps on the board. Philips tend to have bad quality caps so when something like this happens it is almost always due to one or more bad caps.
.
Ask Your Own TV Question
Was this answer helpful?
Ask Dimmu TV Your Own Question
Dimmu TV
Dimmu TV
Dimmu TV, Handyman/Handywoman
Category: TV
Satisfied Customers: 18,413
18,413 Satisfied Customers
Experience: 3 years experience

Dimmu TV 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
The colors are distorted on our Samsung television. It is
The colors are distorted on our Samsung television. It is not even 6 months old. … read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
13,664 satisfied customers
I bought a 50" 4000 series Philips tv from walmart. Got the
Hi. I bought a 50" 4000 series Philips tv from walmart. Got the demo tv that was on display. Yesterday I had it hooked up but its set on the retail store settings and I need to know how to have that r… read more
Shahid
Shahid
Owner of Repair Shop
High School or GED
3,506 satisfied customers
Not able to connect Philips tv to internet to watch Netflix.
Not able to connect Philips tv to internet to watch Netflix. TV recognizes my home network but when I complete a Network Connection Test, message states "Home Network Only. Gateway or DNS is invalid o… read more
Ryan B.
Ryan B.
Desktop Support Technician
High School or GED
1,720 satisfied customers
My tv had been periodically distorting sound but now the
Hello. My tv had been periodically distorting sound but now the sound is distorted all the time. Previously we could fix the issue temporarily but no such luck now. … read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
13,664 satisfied customers
HOW TO FIX RCA 32 INCH FLAT SCREEN DISTORTED/FUZZY DISPLAY.
HOW TO FIX RCA 32 INCH FLAT SCREEN DISTORTED/FUZZY DISPLAY … read more
Harry
Harry
1,683 satisfied customers
The sound is distorted. Sounds like martians talking. We had
The sound is distorted. Sounds like martians talking. We had a guy come out and he just basically pushed a reset button and it fixed. That lasted about 2 months and it is doing it again. … read more
info tech
info tech
Self Employed
Vocational, Technical or Trade Scho
341 satisfied customers
Dlp tv had distortion in black areas. Mitsubishi dlp. 740
issue I thought was a bulb replaced the bulp but still issue with distortion … read more
Eldon
Eldon
BS
213 satisfied customers
There are vertical lines in the center of it. Philips 55. It
There are green vertical lines in the center of it … read more
p0llinate
p0llinate
Bachelors of Science
14 satisfied customers
Sanyo dp42841 has good picture but distorted sound. I've
Sanyo dp42841 has good picture but distorted sound. I've replaced the main board, speakers and the power supply board with no change … read more
Shahid
Shahid
Owner of Repair Shop
High School or GED
3,506 satisfied customers
Picture is so distorted you can't tell anything about what's
Picture is so distorted you can't tell anything about what's on. Colors are wavy. Sound is ok. … read more
Shahid
Shahid
Owner of Repair Shop
High School or GED
3,506 satisfied customers
Many years ago when I bought my Philips LCD 40", the tv came
many years ago when I bought my Philips LCD 40", the tv came with a small two prong "plug" for wireless operation. I was using cable at the time, and didn't need it. Now I wish to use wireless and can… read more
Harry
Harry
1,683 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
13,664 satisfied customers
I have a TC-P60UT50 and the sound is distorted especially at
I have a TC-P60UT50 and the sound is distorted especially at low volume. I tried using DVD's on my Blue-Ray Disc player (model DMP- BDT330) which is connected to the TV with a HDMI wire, through NetFl… read more
info tech
info tech
Self Employed
Vocational, Technical or Trade Scho
341 satisfied customers
Speakers all of a sudden are distorted, like they are under
speakers all of a sudden are distorted, like they are under water or in a barrow. vol goes up and down so does noise. when muted distorsion is muted also. At the same time my closed captioning is on b… read more
Pete
Pete
Engineer
Bachelor\u0027s Degree
1,130 satisfied customers
The sound is distorted. I will go and check now. All black
all black except one white I rang yesterday and was given some istrutions with a reset, but after a few minutes the distortion returned. I believe all cabes connected codrrectly. nothing has changed… read more
Richard
Richard
IT Manager
IT Manager, Consultant
3,413 satisfied customers
The picture is distorted and blurry. Model tr4206 just
Yesterday was the first time I turned on the set and the problem existed immediately … read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
13,664 satisfied customers
The tv has a,, and pink distortion on the right side. It's a
The tv has a white, green, and pink distortion on the right side … read more
Shahid
Shahid
Owner of Repair Shop
High School or GED
3,506 satisfied customers
Half of the screen is distorted on my sylvania 37" LCD, the
half of the screen is distorted on my sylvania 37" LCD … read more
p0llinate
p0llinate
Bachelors of Science
14 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