Question about Samsung HCL4715W 47" Rear Projection Television

Green color comes on and off

When TV is on, the green color sometimes isnt being projected or very lightly as there is a heavy red tint. stuff that is supposed to be normally green is very dull or gray colored. Occasionally i will see a light green flash cover the whole screen and the picture will be normal again. It is intermittent and goes from normal to green not working frequently. Lots of light green flashing. Had the convergence board replaced last year. When green is out, perfect focus does not work and unable to do any green convergence from the menu. Please help! Thanks!

mcmasterson Aug 10, 2007

I have tested it with my DVD player hooked up and when using that it displays the same problem. Also when i watch cable through direct tv, i see the problem. I havent got to the back yet to test the connections. I was in the back a week or so prior hooking up a Wii i just bought. I had to pull out the TV only slightly to do this.

Not sure if the movement or loose cables could be doing this?
mcmasterson Aug 12, 2007

I was looking at the back of the TV yesterday and noticed that when the green is apparently gone, i am unable to see the green being projected at all from the back. I can see the blue and the red projectors throwing off color, but the green projector is dead. I am not sure the technical name for the part. IT looks round as is between the blue and red.

I also have come to notice that if the TV is off for a while then the green works fine for a couple hours. AFter it has been on for awhile is when the green starts flickering on and off.

I have tried hitting the side and moving it around and it does seem to have no affect on having the green come back on.

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I need some answers here... Do you have only one video source to test it? Is this happening with an external source or with your tv tuner or both? I need more info....

Posted on Aug 10, 2007

Anonymous Aug 12, 2007

If sometimes, if you move or hit the tv the green colour flashes, it means that the colour card of your tv is loose. Maybe if you open up the tv and check if all the cards are firmly attached to the tv (something like the pci cards on the motherboard on pc). Also check the cables which are connected to the projection system of your tv.

BE AWARE OF THE VOLTAGE THAT THE TV MAY KEEP EVEN IF YOU HAVE UNPLUGED IT. IT HOLDS HIGH VOLTAGE INSIDE THE CAPACITORS.

Just try with a plastick stick or something. If i was near i could easily fix this for you but now i can only offer you advice.

It's best for you to take the tv to a local tv service rather than trying something extreme with this voltage all around.

Health and security is first of all.
If you have a little experience with electronics go ahead and try my solution.

Thanks for your time.

I hope your problem will get solved ;)

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My tv screen when on turns yellow then after a while it will switch back to normal colors what can be wrong with it....

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Yellow = red + green
normal picture = red + blue + green (RGB). See illustration.

Fig. 1 Additive color mixing in an RGB monitor, or RGB Projection TV.

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HCL4715W Green Color intermittently projecting

It sounds like the common problem with this set. It is an intermittant picture tube, or there is a loose connection on the green drive board on the green picture tube. Try lightly tapping all around on the green drive board while the set is on and see if you have any change. BUT BE VERY CAREFUL! Lots of high voltage on the board. Also use a plastic or wooden device to do the tapping. If you do great, you know you need to resolder the connections on the board or clean the CRT socket on the green drive board. If there is no change, I would bet the green CRT is on its way out. But try tapping the green drive board all over as I said before, that is a very very common fault with these types of TV sets. Good Luck

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I have a red tint to my tv?

If you have RGB color settings adjust either green and blue higher or drop red lower, if this doesnt fix the problem than that means you have a problem with the colors/lights going out inside the TV

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The tv is a 50vf820 it has a green tint to the picture. I've adjusted the tint and color but it don't change still green tint to the whole picture.

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What would cause my jvc tv have a green tint

It sounds like you can have optical engine issue. That's if green tint was show up very gradually, until one day it really caught your attention.Normally some parts of the screen more green than other. It should get progressively worse. To solve this issue optical engine have to be replaced. It is pretty expensive repair if your TV is out of the warranty.
In case if tint appeared suddenly in one moment - you can try to check component cable connection on the back of your TV if you are using one ( green, blue and red colored). Sometimes it's loose or after disconnection people reconnecting it in wrong way.
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Sorry for bad news.
Regards.
Russ.

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Picture calibration settings for 42lg70

Picture Menu
Picture Mode: Expert1
*Backlight: 16
*Contrast: 83
*Brightness: 53
Sharpness: 50
*Color: 55
*Tint: 0
Expert Control

Fresh Contrast: Off
Noise Reduction: Medium
Gamma: Medium
Black Level: Low
Real Cinema: On
TruMotion: Low
Color Standard: HD (N/A w/HDMI)
White Balance: Warm
**Method: 10-Point IRE
- 10 IRE
  - **Red: 1
  - **Green: 2
  - **Blue: -16
- 20 IRE
  - **Red: -6
  - **Green: 0
  - **Blue: -7
- 30 IRE
  - **Red: -5
  - **Green: 0
  - **Blue: -4
- 40 IRE
  - **Red: -8
  - **Green: 0
  - **Blue: -4
- 50 IRE
  - **Red: -4
  - **Green: 4
  - **Blue: -4
- 60 IRE
  - **Red: -6
  - **Green: 6
  - **Blue: -5
- 70 IRE
  - **Red: -8
  - **Green: 3
  - **Blue: -10
- 80 IRE
  - **Red: -8
  - **Green: 7
  - **Blue: -16
- 90 IRE
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  - **Green: 5
  - **Blue: -18
- 100 IRE
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  - **Green: 4
  - **Blue: -9

Color Management System

Red Color: 0
Red Tint: 0
Green Color: 0
Green Tint: -15
Blue Color: 0
Blue Tint: 11
Yellow Color: 15
Yellow Tint: 2
Cyan Color: -15
Cyan Tint: 0
Magenta Color: 0
Magenta Tint: -1

lg70 nice tv excellent processor just to bad there is no intensity control on color management oh well still better than what the three s are pushing block out the hype lg will be number 1 in a few years haters are starting to come around and well leds coming,

p.s. i dont work for lg just tired of losers bashing stuff because they dont own it.
im isf certified those settings are right on the money straighter than a ruler

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Green color comes on and off

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