The monitor hjas lost its original colour,It potrays images that are a bit red and yellow.Its a Compaq V570

Press the button labeled "Auto" on the front of your Compaq monitor. This runs an automatic configuration utility designed to examine your current settings and adjust them to reach the best possible picture quality.

This utility will take only a few seconds and will adjust things like the sharpness, brightness and resolution of the image being displayed. Press the "Menu" button on the front of your Compaq monitor to adjust your monitor's screen settings manually in the event that the auto configuration utility has not done so to your liking.

Navigate to the "Picture" category of your Compaq monitor's on-screen menu to adjust settings like "Brightness" and "Sharpness." These settings can be useful if your monitor is displaying an image that is fuzzy or too dim.

Use the "Color" setting to adjust the amount of red, green and blue that your monitor displays. These settings can be useful if your monitor is displaying too much of one color or not enough of another.

Use the "Default" menu option to reset your Compaq monitor to its original factory settings. This changes any settings you have altered back to the way they were set when the monitor left the Compaq factory

hope this helps

I had dual monitor with color bleed to the right. The solution was
1) identify optimal resolution for both monitors ( Dell 198wfp @ 1400 x 900) and (Laptop @ 1200 x 800) 2) check colour setting (32 bit or 16 bit) 3) reduce colour setting down to 16 bit) 4) Check performance 5) reduce screen resolution 6) check 7) cycle between screen color and screen resolution 8) if no luck, check updating the drivers for graphic card 9) if no luck, check updating monitor drivers 10) if no luck, check altering memory set aside for graphics (onboard memory for example or off-graphics-chip-on-RAM-memory) 11) Monitor checking software is very helpful : try "http://majorgeeks.com/download.php?id=22" for the Nokia Monitor Test (a CRT tester) or any other freeware/shareware testing program such as passmark's products etc.,
You might just have to suffer with a large workspace and mungy grapics performance though ... I am.

Try a different video-cable.

Try tightening the connections at each end of the cable.

Try connecting the monitor to a different desktop or laptop,
to see if the colours are correct -- it could be the video-card on your computer.

Check to see whether monitor terminal has a broken pin. Otherwise change the VGA card.

go to control panel, then go to display properties and try changing the theme to default.

There's not much available from HP in the way of a user's guide for these monitors, but here's a link to the original specifications, and another link that includes an adjustment pattern; or an option to contact HP support and use their online help services, by clicking here.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

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.

Updated section
This red issue has been bugging me over the last week. I have now created over 50 A4 prints of my test file and it was after reading a post from Dan P that the answer came to me. I had been trying to correct the over saturated reds by reducing it in curves, levels and colour balance. Of course this was not the way to go, unless the image has an overall cast. The better method is to enter into Selective Colour within Photoshop and adjust just the red only. The values I have used are Cyan + 15 (this reduces the red), Magenta -5 (removes the remaining traces), Yellow +10 (removes the blue and warms up the skin again), Black -15 (lifts the image). Save the settings and reload them on future images. Create an action and use one of your Function keys to apply the Selective Colours. Incorporate the print command within the same action, this way you can be certain that the selective colour will be applied each time you print. This may not be the ideal solution, but for me it will do for the time being, until Canon come up with a new profile. I expect to make colour adjustments on most images and this is just one of those steps.
Use the Selective colour adjustment - it works The ink levels after 55 A4 prints - I don't think so As near perfect as I can get it Reels are now spot on Note: The above solution is a work-a-round which cures the excess red, once you apply the Selective Colour adjustment the screen image will not look right. The adjustment is applied to correct the printed version. Like so many things digital (and analog) you have to make adjustments to suit your own preferences. The strong vivid colours produced by the ip8500 will appeal to some, others may want to tweak their settings.
As a final note, I have just looked at the ink levels after 55 A4 prints and wow, this printer only uses the light Cyan and Magenta, the rest of the colours are all unused. I don't think so somehow. Canon, I think this does indicate that you have a problem with the driver and have another look at the profiles while you are fixing that.
Would I buy this printer?
Given that creating a new profile is not a major problem and I am sure a new one will follow very shortly, then yes I would buy it. Using Photoshop I have managed to correct the colours to suit my taste, however, some may like the bolder colours out of the box. The ip8500 features and image quality makes this printer stand out from the competition.
Price - £329
Pros:
Excellent photographic print quality
Lots of useful features
Speed
Separate ink tanks
Compact design

Cons:
The PictBridge port can't be used to transfer images to a computer
Colour needs to be sorted out
Black plastic case that reminds me of a cats coffin.

Print quality 85* Features 97 Ease of use 97 Design 96 Value 95 Rating 94 - highly recommended
* Note that this mark is for image quality and colour quality
www.canon.co.uk

In the menu, goto colour temp settings and adjust as needed.
The last item (from memory here) is an option to reset the monitor back to factory defaults, you could try that also.
Hope that solves your issue.

Shoot in RAW mode and convert to 16 bit images to reduce banding