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You need to change the input signal, get into the menu on your monitor and change the signal from rgb to dvi, hdmi or vga dipending on what cable you using for connection.
There is NO rgb connector on that monitor
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.
Neichi could this monitor be set to receive dvi signals and not rgb even if he has the rgb hooked into the monitor? so in menu select rgb input?
Mitch, monitors don't conflict with windows generally usually they(windows os) will install a basic generic driver to run the monitor, and you should do this when changing monitors before you hook up the new one, your description really lacks any concrete description where are the "black and blue errors" what do they look like last I have had problems with modems interfering with video so I would remove the modem and see if the problem goes away.
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