1. When I use my monitor at home the image seems to jump or jitter, but when I try it at my office, the picture is solid as a rock. What should I do?

2. I have color spots on my screen. Is this normal?

3. I'm not getting an image on my monitor, just a scrambled mess. What do I do?

4. Can I use an extension cable on my monitor's video cable?

5. In Europe, who do I call if I have questions about, or trouble with my ViewSonic^® product?

1. When I use my monitor at home the image seems to jump or jitter, but when I try it at my office, the picture is solid as a rock. What should I do?

There are two likely culprits to look for: an unreliable power source and/or electromagnetic interference. First, check your power source. If you are using your computer's power supply or an overloaded power strip, try plugging your monitor into a separate wall socket. Second, check for electromagnetic interference. Usually this is caused by poorly shielded speakers, transformers sitting next to the monitor, or fluorescent lights hanging too closely above the unit.

Another possible source is house wiring behind the walls near the back of your monitor. To test for interference, try facing your monitor in different directions, or moving your monitor to a new location. If you are experiencing electromagnetic interference there are shielding devices available. Contact our customer support engineers for more information.

2. I have color spots on my screen. Is this normal?

No, you should have good color continuity across the entire screen area. Most likely the color spots are caused by magnetic interference. The first thing to try is degaussing your monitor. All ViewSonic monitors automatically degauss when first turned on. If your monitor has a manual degauss, simply activate it. Note, however, that for best result you must wait 30 minutes before redegaussing. If your unit does not have a manual degauss feature, simply turn the monitor off for 30 minutes, then power it back up again.

Several degauss operations may be required to clear the problem.  If degaussing does not help, or if the spots come back after a little while, try rearranging the equipment near your monitor. Devices with magnetic properties (e.g. speakers and transformers) can affect the purity of your monitor. If color spots persist, give us a call for further assistance.

NOTE on Colour Purity:

Colour Purity describes a monitor's capacity to reproduce a coloured area homogenously.

All ViewSonic and Nokia monitors are adjusted and set by computers in the factory. In some environments colour spots or colour variations can occasionally occur under the influence of electromagnetic fields.

Monitors with aperture grilles (i. e. P220f, 445Pro or P225f) are more sensitive than conventional CRT monitors to such extreme interferences.

In this case, however, colour spots or colour variations do not represent defects of the monitor, and can easily be corrected by the endusers themselves through the On Screen controls.

To adjust the picture to your environment please proceed as follows:

1. Switch on your PC and monitor.

2. The monitor should warm up for at least 20 minutes.

3. Now select "Degauss" function via the OSD menu.

4. Then set-up a white background image (i. e. in Word or Excel).

5. From the OSD menu select the function "Purity" or "Corner Purity". (You can find a definition of these terms in the User Guide for your particular monitor.)

6. Adjust the screen image by using the "Up" and "Down" keys until the screen shows a uniform colour.

3. I'm not getting an image on my monitor, just a scrambled mess. What do I do?

This is a synchronization problem. The first thing to look for is a faulty connection between the computer and monitor. Inspect the cables to make sure no pins are bent or loose. If the cable looks OK contact your video card manufacturer to see what the horizontal and vertical scanning frequencies are of the video card at the resolution you are running. They may be outside the range the monitor is capable of using. If this does not take care of things, try your monitor on another system to see if it is the monitor or video card that is malfunctioning. If it is the monitor, give us a call!

4. Can I use an extension cable on my monitor's video cable?

Maybe. Low-quality extension cables may cause an echo effect resulting in an outline of images on your screen (called a ghosting effect). The reason being, the connector and added cable length increase the impedance seen by the video signal. This increase in impedance creates a mismatch between the signal that the video card sends and what the monitor receives causing a portion of the signal to "bounce" back and forth in the video cable. We do carry a high-quality, shielded, low-impedance extension cable. However, a single-piece video cable is a better solution. Image degradation should be expected with cable lengths of twelve feet or more.

5. In Europe, who do I call if I have questions about, or trouble with my ViewSonic^® product?

For information on obtaining warranty service, call your local authorised service centre of ViewSonic as listed in the CallDesk section of this website.

If you are a US customer, you can either call 1-800-888-8583 24-hours, 7-days a week or e-mail us anytime at vstech@viewsonic.com.