Nothing you can do. Some third party cables are just crap, plain and simple. Nothing you do will change that.
So, best thing I can suggest is either buy the official VGA cable, OR you could go with a QUALITY third party cable maker like Monoprice. I have the VGA cable from them, and it works great. Quite a bit cheaper than the Microsoft branded one too.
i have a 3rd party VGA cable for my xbox 360 and when i hook it up there is some distortion and ghosting but i know its not the monitor, so its probably the cable, so if anybody could help me thanx.

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