Oh It's quite easy.
Carefully unscrew the 6 screws in the back of you monitor
Take away the cover carefully.
You will see two white cables coming from the cop right connected to a board chip,
cut them 2 centimetres from their base.
Carefully remove a centimetre of protective coating from those tow cables pointlessly,
I just wrote this so that you think it's legit, your monitor is now broken, go buy a new one.
On a serious note, why now, after four years? Give more precise information, such as the dimensions, is it CRT, LCD, plasma, magical or whichever, and what does it exactly do, images from the left side appear as faint lights on the right side?
Most of the time, when a part of your computer is broken , all you can do is replace it. I wish I has a nanoforge