Question about Projection Televisions

10 Answers

No picture at all just lots of bright colours cant even display menu

Posted by on

  • jayko01 Jul 30, 2008

    I HAVE AN LG FLATRON PLASMA TV WITH XD ENGINE. IT'S LATE 2002 MODEL. I CANT GET ANY PICTURE AT ALL. THE PICTURE JUST WENT SUDDENLY. THE SCREEN IS JUST FULL OF BRIGHT COLOURS I CANT EVEN GET THE MENU UP YOU CANT SEE ANYTHING BUT LOTS OF BRIGHT COLOURED DOTS IT DOESNT MATTER WHAT CHANNEL YOU GO TO THE ONLY DIFFERENCE IS A WIDE LINE OF COLOURS GOING FROM THE TOP OF THE SCREEN TO THE BOTTOM

  • jayko01 Jul 30, 2008

    ITS AN LG PLASMA MODEL NO:RT-42PX10

×

10 Answers

  • 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.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,665 Answers

Write model no to search if any service manual is available.
Check for any loose connections, bad electrollytic capacitor, cold solders at main board etc.
If you are not familiar with electronics troublshooting and repairs better take it to an authorized service station to check what causes the problem and if is cost efective to repair.


Posted on Jul 31, 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
  • 4,234 Answers

Your system has an issue with the digital processing of the signals. Since you can not see the menu, says that the problem is after the "tuner" and character generator circuits and in the display logic. This can be caused by something as simple as a bad cable connection or something more involved like a pwer supply problem. Lets start with the relatively simple things first. Open up the back and reseat all of the connectors and cables. Since the signal levels are so low, it doesn't take much to corrupt the signal. Reseating all of the above will eliminate a connection problem. If that fails to resolve the problem, please update this and we'll start looking at a possible power supply problem.

For the record, there is no "vertical deflection" circuit per se nor is there a trimmer to adjust the brightness as would exist in standard TVs.

Dan

Posted on Jul 30, 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.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 813 Answers

U have set a trimmer from the ckt bord if its Short then brightness is out of control u need to call a professional tb repairer

Posted on Jul 30, 2008

  • sandip panchal
    sandip panchal Jul 31, 2008

    or tay to change the capcitor might be short

×

  • 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

The problelm is a defective vertical deflection system. Could be the amplifier, vertical output driver or whole printed board that supports the vertical deflection activity. It is considered to be a serious failure.

That is my opinion. Even though you could fix it and get another few months or even a year of use, it will surely develop another problem.

hope this may help;

Regards,
VOTIT

Posted on Jul 30, 2008

  • LORETO LACARON
    LORETO LACARON Jul 30, 2008

    LG plasma service trouble repair tips;













    42px10-no pictures replaced all 3 boards Y-sus,X-sus,Logic
    42px10 - lines on screen - two side board faulty TOP and BOTTOM whitch go to the screen(on the left side)

    hope this may help;

    Regards,
    VOTIT



  • LORETO LACARON
    LORETO LACARON Aug 22, 2008

    latest updates of problem threads...

×

  • 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.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,011 Answers

Sir,

It may be the failure of the Convergence IC's. Try to replace the IC's it will be fix.

Thanks
Good luck

Posted on Jul 30, 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.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 382 Answers

Hello,
Try to hard reset the Tv.."Unplugg the Tv for 2 or 4 hrs then replugg it" ..But the actual problem could be a overflow of Power which could have caused this !!...thank you!!...

Posted on Jul 30, 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.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,226 Answers

Hello,

did you reset your computer by unplugging and replugging from the wall outlet?

if yes then same result maybe you can self tech you TV, however at your own risk. (warning high voltage) you can open your TV Circuit and then try to resolder all the connection using the soldering iron becuase some connection is lessen.

may this can help.

tell me more if what ever.

mlenavz

Posted on Jul 30, 2008

  • Emelio Navaja
    Emelio Navaja Jul 30, 2008

    PS:sorry the TV i mean not the computer.

  • Emelio Navaja
    Emelio Navaja Jul 30, 2008

    my analysis is there is no busted parts inside but it only loss connection toward the soldered parts of the circuit board. or maybe its just an only TV tuner got fault.

    melnavz



×

  • 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

Can you let me know model number and make of your tv?

Posted on Jul 30, 2008

  • Shahid Electronics
    Shahid Electronics Aug 03, 2008

    Hi again,

    Thanks for intimation of model number. I can send you LG Plasma service manaul for information and in my opinion, you need to contact LG service center because your TV requires spacial Jigs n Tools to sort out the problem in its circuits or firmware, what ever. Its not case of wrong command of remote or can not be rectify by simple Volt-Meter. Its suphysticated TV and should be handel at concerns service center. Its friendly advise.

×

  • 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.

  • Projection T... Master
  • 6,487 Answers

What's the model and brand of this unit?

Posted on Jul 30, 2008

  • Mark Gil
    Mark Gil Jul 30, 2008

    This is very common. it is the power supply going bad, it should run at
    130 volts dc, but it is now running much lower that this just enough
    for the tv to come on. but not enough to power all the circuits right.

    Hope that helps.......


×

  • 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.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,847 Answers

Wht is the make and model no#?

Posted on Jul 30, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

The picture is greenish


chances are you have a bad tube or bad Video IC on the CRT board that connects to Tube! Look on your CRT Board and replace the video IC first.

Dec 30, 2009 | Projection Televisions

1 Answer

I have a sony kdf-46e2000, there is a pinkish stripe on the top and bottom of the screen, what is causing that?


Looks to me as an serious (but not uncommon) PSP board problem with Sony plasmas. Contact a Sony service center.

What problems have people had with quality control on these displays? Are they covered under warranty?
  1. Certain displays emitted an extremely loud buzz. This was covered by warranty repair.
  2. Certain displays had a problem with the Y/C delay on their S-video input. This was also correctable.
  3. One person reported red vertical lines on his display. Was this covered by warranty? Was it an input problem or a pixel problem?
  4. Afew bad pixels here and there are not covered under warranty. Largeclusters are generally covered. It's up to Sonys discretion. On the plus side, however, bad pixels are becoming increasingly rare. Mostpeople are reporting no bad pixels at all!
CALIBRATINGWhat needs to be calibrated on a plasma?
You needto calibrate most of the same things that need to be calibrated onother displays. About the only things that don't need to be done areconvergence and geometry. You can usually tinker with picture size andposition, but there's no need to deal with keystone or pincushionadjustments, etc.What is white level? What is black level? How are they adjusted?
Theadjustment for white level is usually labeled "Picture" (as onPanasonics) or "Contrast". "Brightness", on the other hand, refers tothe black level. Yes, this is apallingly counter intuitive. This FAQuses the terms "white level" and "black level", since they betterdescribe what you're actually adjusting, and they're the terms used byAvia and Video Essentials.
How do I adjust hue and saturation?
In another mysterious choice of terms, hue is controlled by the "Tint" setting,and saturation is controlled by the "Color" setting. This FAQ uses theterms "hue" and "saturation", since they're the terms used by Avia andVideo Essentials.
How do I set the white level on a plasma?
Youset the white level by adjusting the "Picture" setting. You will needto use a different test pattern than you would for a CRT. For both plasma displays and LCD displays, you should use the 10 IRE grayscalestep pattern. There are two criteria you want to match on your plasma.
First,you need to make sure the white level is low enough that your displayisn't thresholding (or clamping) bright levels. You should set thewhite level low enough that you can see each of the 10 IRE stepsdistinctly. The Sony seem not to exhibit clamping (in my limitedexperience), even at factory defaults, so this criterion may not beterribly useful.
Second, for the health of your display (e.g.to avoid burn-in), you should turn down the white level. Just becauseyour display can display blindingly bright pictures doesn't mean that it should. Plasma displays should be set between 21 fl and 25 fl light output; the Sony comeout of the factory at about 30 fl. On one ISF-calibrated Sony, 23fl was roughly equivalent to a Picture setting of -20 (in the usermenu, not the service menu). To set this precisely you'll need to bringin a calibration specialist, but you can do a lot of good by justdialing down the white level a lot. After seeing the display at 30 fl,23 fl will see very dim. But after a while, you'll find that 23 fl isplenty bright.
How do I set the black level on a plasma?
Youset the black level by adjusting the "Brightness" setting. You can usethe same test pattern you would use for any other display.
How do I calibrate grayscale (calibrate the color temperature)?
Unfortunately,this is one you can't do yourself. You need special equipment tomeasure the color. In fact, most ISF technicians lack the equipmentspecific to plasma calibration (a $15K gadget known as aspectroradiometer). But even the standard color measurement equipment(which calibrationists do have) will do a great job.
Thatsaid, one person who had his Sony display calibrated by an ISF specialist said that the Cinema / Warm setting was reasonably close to6500K out of the box. Using that setting is probably the best you'll doon your own.
If you're really determined to screw up yourdisplay, the RGB drive and cutoff settings in the service menu are used to adjust the color temperature.
How do I adjust the color decoder?
There are several issues here. Generally speaking, the Panasonic decoder seems topush blue a bit. The R-Y Axis Angle and B-Y Axis Gain in the servicemenu are used to correct this behavior.
There used to be aproblem on some Panasonics with the Y/C delay on the S-video input. Seethe Quality Control section for more information.
How do I adjust the gamma?
On the industrial model, there is a set of Advanced picture settings. Go to the Picture menu, turn Advanced on, and then hit the down-arrow. In the subsequentmenu you can adjust quite a few parameters, including select from a fewgamma settings.
This advanced menu appears to be missing from the consumer model.
How do I calibrate my consumer model given these missing menus?
Thereis apparently a way to activate these menus. Perhaps you can find acalibrationist or Panasonic technician would can turn them on longenough to do the calibration.
What's the overall calibration procedure?
In general, the order Avia sets out is the correct one. A more complete list is:
  1. White level (picture)
  2. Black level (brightness)
  3. Repeat (1) and (2) until you have a good balance.
  4. Grayscale (requires special hardware and mucking about in the service menu)
  5. Sharpness
  6. Hue and Saturation (tint and color)
  7. Color decoder (requires use of the service menu)
  8. Repeat (6) and (7) for red and green until you have a good balance.
SERVICE MENUHow do I access the service menu?
In a word, don't. See the service menu warningabove. If you're bound and determined to make use of the service menu,buy the service manual. It contains more than enough information foryou to ruin your display and/or kill yourself.

Aug 18, 2009 | Sony Grand WEGA KDF-42WE655 42" Rear...

2 Answers

42" sony plasma wont power on


I don't think Sony makes a Wega Plasma. Sony did make a plasma about 7 years ago but it wasn't Wega. Are you sure it's not Grand Wega SXRD or Lcd type

Apr 13, 2009 | Sony Grand WEGA KF50WE610 50" Rear...

2 Answers

Sony projection Tv KP-65XBR10W has no picture or sound


I had a Sony recommended serviceman come in to analyze te same problem for me. Turned out to be a major part called the 'D' board. Cost for part around $400 if it could still be gotten and at least $300 in labor. Goodbye TV! My money will be better spent on a replacement LCD/Plasma TV since prices are dropping and picture quality will be dramatically better than the old beast.

Dec 30, 2008 | Sony KP-65XBR10W 65" Rear Projection...

1 Answer

I have a polaroid 15 inch lcd tv and i am unable to change the contrast colour or brightness it will not highlight on the menu programe


You need to access the picture menu then user settings then set the levels to your preference, it is now on one of the preset levels ie.movie/etc
SUPER8

Dec 01, 2008 | Projection Televisions

2 Answers

Sony Plasma KDE-P42XS1 Television


We had the same problem discovered it was the TV bulb was going out. Thought the light would blink before that happened according to the book but found out it only blinks when it goes out completely. Buy the bulb and put it in yourself, it's easy and will save you at least $100.00

Dec 29, 2007 | Sony Grand WEGA KDF-55WF655 36" Rear...

1 Answer

Apex rear model?


I would say it's a adjustment you will need, is the convergence aligment ok, to adjust this you will need to find the adjusment block in the front, this is a black unit about 4" x4" and has lot's of wires that comes in.
On this block there will writing on it focus, and screen, well your half way there.
Adjust the green screen control downard to see if it adjuses your green problem if it does, here how you adjust the rest.
First go to your menue, turn the colours off. yes off.
next put contrast to max.
next turn your brighness to 40%
Nest ajust the screen control until you no longer see any trace line of the colour you or seing so that at the end product you het the best black and white picture you can. This will give you the end resolt for best picture posible.
Adjust the other colour after, to see if you or close to the corect adjustment go back to the menu and turn contrast down you shouldn't see any trace line.
Another problem people don't understand this unit have to be clear once's every 2 years.
This I won't explain it's a very long process if done right . Rear projectors has to be clear because with time you will notice the picture looks like you have catarack. or white filtering of the picture. This is when you know it need's cleaning, I do it all the time when I go to customer home, yes I do house call's. I think I'm the last one out there, most shop what's the tv in the shop mostly to be able to control the price there about to hit you with and if the customer doesn't pay there just sale it, they have the control and not you.

I hope this help, keep in mind it's very expensive to have tv repairs, but you have to pay, this what keep's tech going without them, well you can just imagine.

What About Bob
Timmins, Ontario

Nov 04, 2007 | Apex Digital GB4308 43" Rear Projection...

Not finding what you are looking for?
Projection Televisions Logo

Related Topics:

34 people viewed this question

Ask a Question

Usually answered in minutes!

Top Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

matt martin
matt martin

Level 3 Expert

1191 Answers

yadayada
yadayada

Level 3 Expert

60769 Answers

Are you a Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...