Question about Televison & Video

6 Answers

There's sound but no pic on my 27" lcd tv - Televison & Video

Posted by on

  • 1 more comment 
  • jstjarre Sep 19, 2008

    My ilo lcd tv has sound but no picture. Model # v27dmbx

  • jstjarre Sep 19, 2008

    My ilo lcd tv has sound but no picture. Model # v27dmbx

  • jstjarre Sep 20, 2008

    My ilo lcd tv has sound but no picture. Model # v27dmbx

×

6 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 3,037 Answers

Like others have said, this is most likely an Inverter that has gone bad. If you have experience with high-voltage electronics, then by all means test it and check that it is good otherwise find someone that is qualified to do it for you. If it turns out to not be it (slim chance) let me know and I will tell you what else you can check

Posted on Sep 20, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,952 Answers
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 2,071 Answers

LCD TV TroubleshootingThe defective LCD TV may have the following common symptoms:

Symptom: No picture on screen but LCD TV still has sound.
Solutions: The problem is cause by defective inverter. Replacing ivnerter will solve hte problem. Symptom: Screen flash on and off between 1/2 to a few seconds, but power indicate light stays on and TV still has sound.
Solutions: The problem is cause by defective inverter. Symptom: Blue Screen but no picture
Solutions: The problem is cause by defective Main Board(AD Board). In some cases, this problem may cause by the defective Screen Controller board. Thsi board is mounting on teh back of LCD TV Scree. Symptom: Power light stays on but no display and sound
Solutions: The problem is cause by defective Main Board(AD Board) or Power supply board. Symptom: No Power or Power indicate light does not lits
Solutions: The problem could cause either by defective Power supply board or defective Main Board(AD Board). Symptom: Screen is half dim and half bright
Solutions: The problem is cause by defective LCD Panel.It needs to be replace.


If the PSU is running ok and there are no any leds glowing on the front check to see it the fluorescent tubes or CCFL (on each side) are glowing they usually have their own supply generators powered or inverter by 12v from PSU. The inverter is the one to power up the LCD-TV CCFL (cold cathode fluorescent lights). An inverter control circuit with a resonant frequency modulation function provides a control circuit module that can modulate different resonant frequencies externally to fit loads of different modes without changing the inverter components such as a voltage transformer or redesigning the circuit layout. The RC oscillation circuit of a resonant frequency controller of the invention includes several separate resistors, and the separate resistors of the RC oscillation circuit are coupled to at least one switcher to form an open circuit or a closed circuit to determine the total resistance of the RC oscillation circuit for modulating different resonant frequencies. Inverter have a life span or life time hours,its better you replaced with a new one,so it works better again.Click this links for more information about inverter , http://www.byfort.com/ccfllamps.htm

Hope it may helps you;

Regards,
VOTIT

Posted on Sep 20, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi,

Your concern was pointed to by another expert bunnydawg. Being an LCD TV, no protection circuitry kicking in, no blinking lights and everything seems OK albeit the display, pls try turning it on, shine a flashlight diagonally across the screen where the volume level normally is shown, using the remote, increase or decrease the volume. If you can see semblance of the volume level, then it could possibly be:

  • CCF lamps (cold cathode florescent lamps) that provide the backlight; and/or
  • the inverter that provides the high frequency high voltage power to the lamps.
It is quite rare for all the CCF lamps to burn out at the same time. Having said this then it is very possible that it is the inverter. In some units, the inverter could be triggered off in the absence of an intelligent video signal, power saving mode, sleep timer.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Sep 20, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 10,594 Answers

It would be nice if you post here model and brand of your lcd tv.

Posted on Sep 19, 2008

  • Shahid Electronics
    Shahid Electronics Sep 19, 2008

    Please click ILO TV problem link and get a little bit details of problem.

    In my opinion you need local tv tech person to fix this issue. If repair cost is greater, buy a new tv.

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Televison & ... Master
  • 69,102 Answers

The high voltage circuit has failed, I know from past expeariance that the board is around $500 and then the labor and set up after repair, the fact is that sadly a new TV is going to be your best choice, I think LCD's are the best.

Posted on Sep 19, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

On TV1 screen stays blue and no sound go to AV1 DVDplayer have pic and sound The tv was given to told it worked is it a code


Did you scan for channels after hooking up the antenna?
Have the tv scan for available channels in your area.
Should be on the tv menu to scan for digital or analog channels.

Feb 05, 2016 | Olevia LT27HVX 27 in. LCD Television

1 Answer

My 27' tv has sound but no picture at all


Now,the tv turn on u have a picture flashes few sec.than dies have sound lelf only?Yes,the tv have 1 or 2 long boards that call the LCD inverter boards are dead.These 1 or 2 Long LCD inverter boards job are to help the LCD screen panel to have a backlight to produced a picture.Tries websites like Shopjimmy.com,Ebay.com to buy those refurbihes 1 or 2 long LCD inverter boards for the replacement.

Dec 11, 2010 | Akai LCT2715 27 in. LCD Television

1 Answer

RCA 27 NO PIC / SOUND - Binking green light


I ouldn't find any good news on the web about this,
so i did a bit of research and discovered that it wouldn't cost me much more than the cost of repair if I went to Best Buy and bought a new HD-TV.
Wow ! The prices have really come down !
Now I'm glad that it malfunctioned !

Oct 20, 2009 | RCA F27TF700 27" TV

1 Answer

INSIGNIA LCD NOT WORKING


check skart lead connections,and check that the tv is on the right channel,ie av1,av2 ,or skart 1or 2

Jul 30, 2009 | Insignia NS-L26Q-10A 26 in. LCD TV

1 Answer

I have a 27 " Olevia LCD - TV. It


if it hot were you live t.v;s don't like heat above 35 degrees celsius

Jul 25, 2009 | Olevia LT27HVX 27 in. LCD Television

1 Answer

No pic no sound


your TV was overheat. check secondary power supply inside chasis. check all the components specially thus budged capacitos.

Jun 03, 2009 | Vizio GV42L 42 in. LCD Television

2 Answers

Power failure


OLEVIA SAYS UNPLUG ALL (ELECTRIC, CABLE ECT. FOR 2 HOURS THEN REPLUG IN, THIS WILL RESET POWER PROGRAMMING0

Jul 12, 2008 | Syntax LT27HV 27 in. LCD HDTV

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

114 people viewed this question

Ask a Question

Usually answered in minutes!

Top Televison & Video Experts

The Knight
The Knight

Level 3 Expert

72230 Answers

Electro Med Services...
Electro Med Services...

Level 3 Expert

6694 Answers

yadayada
yadayada

Level 3 Expert

69102 Answers

Are you a Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...