My moniter (dell m992) has suddenly gone a funny colour. its showing what should be the colour green its now black colour and were the colour should be red its an orange colour. so im getting no green or red colour on my screen. whe i take the pin plug out of the back of pc ,the test signal comes on screen and the colour green and red are ok .as soon as i put pin plug back in screen is back to the funny colour. all the pins are fine and not bend in any way on the pin plug . help please , many thanks

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 settings you can change the settings for more or less pixels or from the drop down list pick the appropriate level of color range or troubleshoot also select advanced then general dpi normal size,larger size or custom settings
always click APPLY after making any changes
click start control panel administrive tools computer management device manager scoll to scroll to monitors + to expand plug and play monitor you might see a yellow question or exclamation mark ? or red x you will have to update the driver right click where you have options to update driver
if your computer came with a motherboard disk the drivers could be on it or you could download

cnetdownload.com on the home page you should see the download software finder under that there will be a list platform, category sub category price from the category drop down list select drivers then from the price drop down list select free or which ever applies to your need or major geeks download this graphics driver this will depend on your operating system

http://download.cnet.com/%7Bvalue=http://www.download.com/ati-catalyst-display-driver/3000-2108_4-10608736.html

This is a WHQL release from the Release 260 family of drivers. This driver package supports GeForce 6, 7, 8, 9, 100, 200, 300, and 400-series desktop GPUs as well as ION desktop GPUs. What