Colour is very yellow and different settings makes no difference. Also after a few hours i loose picture and have just a black screen but still have audio. Could this be the color wheel or something else.
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A few suggestions here--first if possible look into the lens of the tubes with set on--is one brighter than the two others? A loss of blue to some degree would mean yellow (red and green).
Also ( you may have to remove entire grill from front below screen) with set off make sure all 3 of the circuit boards that plug onto the bottom of the necks for each tube are not loose or one has not slid down a bit.
If the problem happens using different input and devices, then it is either the terminal circuit (input/output connectors) or the processing unit in main board. The terminals are unlikely the culprit if problem concerns different inputs.
I imagine that the picture is not properly B&W (gray-shades) but some kind of reddish, bluish or greenish picture as the LCD will process picture using RGB (red green blue) channels instead of CYMK (cyan yellow magenta black) like CRT TVs.
Test the TV using an external aerial. You will notice if the channels have the wrong color even from static.
Use different inputs, different cables and different devices. beware of SCART cables, the SCART contacts are very easy to break. A defective cable will loose picture. Better testing using AV cables and component cables. AV cables are red/white for sound and yellow for video. If the two-wired yellow cable does not work, then the TV is faulty. Other test can be done using component cables. Component cables send the three red-green-blue signals on different cables, hence testing is simple. Test swapping cables and see if TV tone stays the same if color tone changes the problem were the cables. Test also using at least two different devices (e.g. one DVD player and one TV receiver or a playstation).
If you find that the TV is defective call the manufacturer at the number listed on manual. If the problem is that one or more RGB channels do not work the TV main controller board must be replaced.
click start control panel,display,desktop you can select a different desktop from the drop down list or a browse button where you can select different picturesthis may vary depending on your operating system also settings you can change the settings for more or less pixels or from the drop down list pick the appropriate level of color range or troubleshoot also select advanced then general dpi normal size,larger size or custom settings always click APPLY after making any changes click start control panel administrive tools computer management device manager scoll to scroll to monitors + to expand plug and play monitor you might see a yellow question or exclamation mark ? or red x you will have to update the driver right click where you have options to update driver if your computer came with a motherboard disk the drivers could be on it or you could download
cnetdownload.com on the home page you should see the download software finder under that there will be a list platform, category sub category price from the category drop down list select drivers then from the price drop down list select free or which ever applies to your need or major geeks download this graphics driver this will depend on your operating system
Interesting, I haven't seen that since my snes! Try makeing sure your AV cable is connected properly and tightly. Then try to connect it to a different Av port on your tv or to a different TV, if you can. Last, try to get your hands on a known good cable, available for about $13 or $14 at: http://www.gamestop.com/search.asp?N=138+115
or even better see if you can borrow a friends cable.
If none of that works, let me know and I will try to get a better solution for you.
Here is a list of reasons why colours on electronic designs might differ from printed designs:
Monitors work in the RGB (Red,Green,Blue) colour space while printers use the CMYK (Cyan, Magenta, Yellow and Black) colour space. Designs look fine on a monitor if they are designed in RGB to begin with. Converting them to CMYK might make them look odd on screen, but they will print correctly, to a certain measure. It is difficult to sign of an image file that is currently in CMYK mode while viewing with an RGB monitor.
Monitor settings differ. The designer was sitting in a darkish room when choosing the blue and his blue looks vibrant. The client was viewing the same design in a well-lit room, making the blue seem lighter. The designer uses an LCD display and the client uses a CRT monitor and the vibrancy differs. The contrast and saturation settings on each monitor might differ as well, rendering the blue with different values.
Each printer in the world prints colour slightly different. Sometimes it is really obvious and sometimes it is almost impossible to see the difference. Normal desktop printers are definitely not something to do colour proofing with. If you print the design out on your desktop printer then a slight shortage on any of the colours will make the colour come out wrong. There are a lot of factors that can influence even the most expensive printing equipment. These include altitude, humidity, the current heat of the printer, age of the printer, quality of ink, the paper that is being used, special coatings on the paper etc. Even viewing the same printed material in different lighting conditions may make the colour seem different.
Tips on getting the most accurate colour Go to your nearest printer company and ask to see their Pantone colour matching system. Each colour in the Pantone chart has a matching number. Most design applications have the same Pantone charts built in so that colour matching is easy. Read up on Pantone at Wikipedia. Make sure that the file is converted to CMYK (If not designed in it originally) before sending it to print. Some printer companies might ask for colour separation prints which the leading design packages can produce. It is also important for the designer to choose the correct colour management profile in the design package.
Not knowing what sort of printer you have it's hard to pin-point exactly what the issue may be. Taking an educated guess I'm going to guess that you are using an inkjet of some sort. These printers will often use a combination of the cyan, magenta, and yellow inks to make black and shades of gray, and it is possible to get pink instead of gray if the cyan and and yellow are to low to provide a mix to produce gray. Try new ink cartridges to see if that makes any difference...some printers, like DesignJets use individual cartridges for each colour, and most small printers use a combination cartridget that contains cyan, magenta, and yellow ink in different reservoirs in the same tank.
If you are using a printer that doesn't require both the colour cartridge and the black cartridge in to function, try pulling out the colour cartridge and printing in grayscale. Most printer drivers are designed to recognize the fact that the printer only has the black cartridge in it and will automatically make the necessary adjustments.
your problem is in blue color cathode circuit.
as you say that it becomes ok tha5t means
1 cable wire is loose from computer to monitor.
2 crt base loose.
3 loose contact in blue video ckt.
4 signal processor cable to crt board connector loose.(blue wire)
Are you getting this on all video outputs from the DVD? the yellow analog out + the red/blue/green + the S video?
Did you try connecting a different source? a digital cable TV tuner, or another DVD player?
sometimes DVD players get screwed on some outputs, while the rest stay fine. I have a DVD that has an analog video out that shows an only black and white picture, while the red/blue/green works fine.