Screen keeps changing to different colours when i switch pc on

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 pictures this may vary depending on your operating system. also you can change the settings for more or less pixels or from the drop down list pick the appropriate level of colour range or troubleshoot also select advanced then general dpi Normal , Larger or Custom settings.
always click APPLY after making any changes
windows 7 Open Personalization by clicking the Start button, clicking Control Panel, clicking Appearance and Personalization, and then clicking Personalization. Click Window Colour and Appearance. Under Window Colour and Appearance, click the colour you want, and then click OK. Note If you see the Appearance Settings dialog box instead of the Window Colour and Appearance window, the theme might not be set to Windows Vista, the colour scheme might not be set to Windows Aero, or the computer might not meet the minimum hardware requirements for running Windows Aero. For more information, see Troubleshoot problems with Windows Aero. Hope this helps.

If you have an older graphics card the signal will still be searching for a monitor. Contact Viewsonic and they will get you a non DDC adapter.

service.us@
viewsonic.com
or
T: (800) 688-6688

Good luck
Joe

Get rid of this model!!!! The Hannspree and Toshiba models used a TFT LCD screen from a chinese manufacturer that has put out faulty components for the last 3 years. The Problem is in the way the Active Matrix Screen was manufactured. I would recommend you return this item immediately to the place where you purchased it and pick a different brand; also stay away from Westinghouse!

Seems to me that the LCD cables are not properly atached.
Double check all the LCD connections.
Your problem will be solved.

Monitors mix the 3 "primary" colours, in various proportions, to produce all other colours.

Mix equal parts of all 3 colours, and you get WHITE.
Mix equal parts of only 2 colours, and you get YELLOW.

So, either:
1. your computer's video-card is not sending the 3rd colour;
2. your video-cable between the computer and the monitor is broken, and is not transmitting the 3rd colour;
3. your video-cable is not TIGHTLY connected at each end;
4. the electronics inside the monitor that SHOULD be producing the 3rd colour have failed.

Try connecting the monitor to a different computer, with the same video-cable. If it works correctly, your video-card is the problem.

Try connecting the monitor with a different video-cable, to see if replacing the cable fixes the problem.

Try connecting the monitor to a different computer, with a different video-cable. If it still is incorrect, then the monitor needs repair/replacement.

Colours on the screen are generated by "mixing" the 3 primary colours.
Of the primary colours is RED.
So, your LCD monitor is not receiving signals from your computer,
specifying the other two primary colours.

Check the data-cable between your computer and your monitor,
to ensure that the connections are tight at both ends.

Try a different data-cable.

Try your monitor on a different computer, with two different data-cables.

Try a different monitor on your computer.

It could be the video-card inside your computer is failing to "send" one or two of the primary colours.

Hello

My first guess is that the screen circuitry has gone bad - although fixable. Use an external monitor to verify this. If the external monitor is fine then the screen circuitry is bad, if the external screen shows the same problem then the video chip or associated circuitry has gone bad. My company fixes these all the time.

hi im wesley. please make sure that you keep speakers and things like that away from your screen and switch your screen off and plug it out for a few hours if it duznt come right its not magnet that caused it it might be settings of your vga card.

The screen colour changing is apparently an auto test procedure on the monitor and was prompted by a fault with the monitor not automatically shutting down when the computer is shut down. The settings on the monitor have been adjusted to rectify this and the problem is now gone.