What would cause the monitor's color settings to change? I booted up one day and immediately noticed the colours looked wrong. I checked the settings and found all the RGB numbers were different from what they had been. My user setting had gone up to R100/G100/B100 (I had not accidentally applied factory settings). The normal, red and blue presets (which cannot be altered) have changed too. I re-applied my user preset but the result is not what it used to be. Overall, the monitor seems too bright, and no amount of fiddling with the brightness/contrast will make it right.
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Well a few things could be wrong. In my shop I could tell you pretty quick which it was. But lets look at the possibilities. 1. Monitor has gone bad. 2. Somehow the monitor has become partially disconnected from the PC on one end or the other. 3. The video card has gone bad.
First check that the cable is plugged in to the PC and the monitor securely. If that doesn't fix the problem check it with another monitor. Borrow one if you have to. If that fixes the problem then you know your monitor gave up. If it doesn't fix the problem then your video card is bad.
Unfortunately that's the age old problem of matching colors between computers and printers. Your printer is probably not the problem, that's why he couldn't fix it. Even though your monitor is set to default values it doesn't mean that your colors are correct as colors can vary from monitor to monitor and the color temperature is probably too high causing the colors to look lighter than the printout. The picture on the monitor may look good to you, but it's not set right for matching printer colors. Monitors use RGB (Red, Green & Blue colors) colors and printers use CYMK (Cyan, Yellow, Magenta & Black) colors and you have to make them get the results you want. You will have to do some tweaking of your monitor's settings to get it to match the printer output. Below are some links that will help explain things better and maybe help you adjust your monitor.
there may 2 problems 1 ) Problem with the Data Cable connector the Pins might be damaged try to arrange them if disturbed / bend . if Broken change the connector. 2) Open the monitor see the soldering carefully you can locate out the dry solders easily by seeing the flux colour around it . just put the solder over there..by soldering gun to all places where u can see the dry solder.
I also replaced the color wheel in my EP739 after the old one disintegrated suddenly. Colours were then all over the place. Actually, it looked like each colour channel was displaying all the colours of the rainbow!
Here is the procedure I used to solve the problem - maybe not as elegant as Marrie's solution, but it will not cause any damage, will most likely solve the problem, and you will be able to get everything back to the way it was if it doesn't work:
Have the projector running and displaying a stationary picture. The right sort of picture to use is one that has a full range of brightness values from near-black to peak white. I used my lap-top as the source. Also, this way you can compare the projector's picture with the picture on the lap-top.
Press the power button once. "Power off the lamp" dialogue box appears. Hold down the left arrow button until the service menu appears (takes about 8 seconds).
Using the up/down arrow buttons, scroll down to "Color Setting" and press "enter".
Scroll up to "Color Wheel Index". Make a note of the existing setting for later reference. You can change the Index setting over a range of 100 to 550 by holding down the left/right arrow buttons. As the setting changes, the colour rendition will slowly change, and at some point the colours will come right. Note that the changes are quite slow. Find the lower and higher settings where colour aberrations just start to appear, and set the Index mid-way between.
If this doesn't fix the problem, return the Index setting to original. My original setting was 354 and the new setting was 461.
I do not advise touching any other settings in the service menu unless you have access to a service manual and know what you are doing.
Have you loaded the drivers which came with the monitor. This will probably allow you to change the settings.
Right click on an area of your desktop and choose properties. Look at the monitor and make sure the resolution is set to the recommended level possibily between 60 or 75 dependant on the model. Also you can get to the display card settings here and change them to suit. Dont get carried away or you can make it so that you cant see whats on the screen at all to be able to change it. Could also be that your monitor is faulty. Check with your manufacturer. It its an old telly type monitor maybe one of the "guns" have gone so you dont get the right colour mix of red green and blue. If this is the case you will need to get a new screen.
I assume you tried another monitor cable as well, if you didnt, it is one of the most common causers of unbalanced colors. if you did, my guess is you have a bad color gun. It's a very common problem. in this case, a trip to the local repair shop is necessary. before you do, you can try pulling out the VRAM and reinstall it. its a long shot, but you got nothing to lose.