Please explain distorted? All wavie and scrambled-like? Is the bottom black anywhere? Or is the picture just wiggling a tad?
The first thing I would do is try the monitor on another computer or video card (probably not the problem, but its worth a shot). If it works after being changed, it may be your video card.
If that didn't help, try moving your monitor and computer to another power area of the house (the room or area surrounding the room runs on a separate 'fuse' than some areas in the rest of the house). Move the computer to a separate area that is on a different fuse. If it stops after it has been moved and plugged into a separate fuse, it's probably the power conditions in that room. The power in the room may be over burdoned with electrical appliances (this makes my monitor 'wiggle'- I have way too many things plugged into one socket). If you cannot fix the rooms power situation, but you have determined it to be a power problem, try lowering or raising your monitors refresh rate. This can be done by right-clicking the desktop, go to properties, click the settings tab, click on the advanced button, and then click the monitor tab. In this screen, you will see something like "Screen Refresh Rate". If you can, make sure the "Hide modes that this monitor cannot display" is CHECKED. If you venture into screen refresh settings that the monitor cannot handle, it may cause damage to it. Anyway- change the Hertz rate around several times and click apply to test which one works the best. Once you found one that fixes the problem, click apply, and click "yes I want to keep these changes".
If that is not the problem, its most likely your monitor. If you still have a warranty, take it back or contact the manufacturor for repairs/replacement.
I assume you've already tried wiggling around the video cord, replacing the monitors power cord, wacking the monitor, etc...
If all else fails, just go to best buy and get the $100 17inch monitors they have there. They are really nice and cheap, and they shouldn't give you any problems.
DO NOT OPEN YOUR MONITOR AND TRY FIDDLING AROUND INSIDE! CRT monitors and TV's hold deadly charges, even long after the monitor has been off.
Also, don't try taking your monitor for repairs. Radio shack charges you $50 JUST TO DIAGNOSE THE PROBLEM. They charge additional money for parts and labor.
Hope this helps.
~JAB