I use the 2220wm connected to my laptop. Today I noticed no red color, and after wasting the better part of an hour checking software settings, I checked the cable connection, and sure enough, that's where the problem is. I don't know it this will help solve anyone else's problem, but hey, it can't hurt to try!
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Re: red color problem
As you are not able to see red color on your monitor means you will be seeing
your problem is that red signal is not coming to red cathode of your crt.
1 connector loose(cpu to monitor)
2 crt base loose.
3 loose or print or dry near red cathode circuit
4 red video output.
5 red signal from processor to red video is missing
6 processor ic.
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There is an option on the monitor to reset colour to factory default. Just bring up the on screen menu by pressing the left most button at the botton. Use the button next to this to highlight the colour settings which I think is the 5th or next to last option down. You will then see the option to reset colour and various other factory default settings. Happy computing
i think this problem accure due to chage of CRT CATHODE. if you are not a hardware engineer then check it from hardware engineer. any crt monotor have 3 RGB Cathode to release electron on screen. the electron comes shodow mask and create a pixel on the screen the pixel make a picture. The RGB color make the perfect picture. if your picture is dull then i think that happen due to less negative chage of Cathode or any Crt base Bios ic is failior. so you have to checked it from hardware engineer.
1. if your monitor is old. due to aging it happens normally 2. Check monitor signal cable 3. Else the colour processing circuit is defective. 4. Check whether your monitor settings are set correct(default) 5. Contact monitor service centre for further rectification
in Monitor CRT Red-Blue-green cathode guns are there.. Mixing of these colour we can get the original colour chrominace technique. if any of the colour gun is faulty we would get more REad or blue or green picture. Measure RGB voltages. you can verfify which gun is faulty. if then check RGB processing circuits. Else there might be problem Chrominance colour decoder system. Contact service centre
Is your monitor by any chance sitting next to unshielded speakers or anything else which could generate an electomagnetic field? You can get some terrific colour shifts with these items. If you do have anything like this put some distance between them and the monitor.
Also the auto degauss coil circuitry could be faulty in the monitor. Take it to a repair shop and ask the tech to degauss the tube and see what difference it makes. If it fixes the problem get him to check the degauss system. Don't try this yourself. There's lots of voltage running around inside a TV. Fix don't Fry