-When a monitor goes bad you are usually stuck with replacing it. If you are lucky you can find someone to repair it. The number one thing to remember is never to try and fix it from the inside yourself. This can kill you! Even when the monitor has been unplugged from the wall for a while. A lethal charge will remain in the monitor for a good amount of time, this is stored in the capacitor. If you want to die and void the warranty then open the monitor's case. You get the idea.
-Now what are some thing's to look at when troubleshooting monitor problems? Most of these are fairly common and easily fixed. Again not from the inside though.
-Most of the time your problems are with the cabling, or interference from other devices.
-Interference-
-Is caused by
Uneven Electrical Currents
Interference From speakers, fans, and telephones
Bad connection through cabling
Cabling over length
-Electrical currents, can cause some real strange problems as with the rest of the computer. You may already know what a culprit surge protectors or even the power supply of the computer can be. If you suspect that your power supply or surge protector is causing the problems simply plug the monitor into the wall separately. Now in many offices that share power hungry devices on the same circuit you can run into some real problems with your monitor, or system itself. Find another less crowded power source. This can get so hairy you might need to call an electrician to hook up more power to the home or office.
-Another way to remedy this is to purchase a (UPS). Uninterruptible Power Supply, this will take up the slack in the line. The UPS can also help out in those power outage times.
Other Symptoms
-Interference, can be a funny little problem to have. If you are having interference this is usually to fans, speakers, or anything that produces electromagnetic fields. This can show up in really cheap multimedia speakers on your system. They should be shielded but don't count on it.
-The source of the interference is fairly easy to recognize simply because it will warp the screen a little more in one direction than the rest. This means you will need to take something further away from the desktop to cure it.
More Symptoms
-Cabling, the cable itself for the monitor can be bad. Not only can these cables have electromagnetic interference like the rest of the monitor but will also distort you signal if interfered with. This is unlikely in most cases since the cable is shielded itself but can happen.
-Length, the cable length can cause you a problem should it be to long. Most cable for a monitor are under 5' long and should stay at that. The longer the cable the weaker the signal. If you do have a cable extender make sure it is shielded.
