Apparently this issue crops up because of failing 10 cent resistor.
http://icrontic.com/forum/showthread.php?t=19549
Lot's of good advice, the first thing I did was some advice I found about 2 or 3 pages in. In the monitor menu go to options, then select "color restore", I would have done this before but the option doesn't become available for about 30 minutes after you turn the monitor on and wasn't aware of that. This has helped a little but its not anywhere near its former glory. Anyhow I'll be trying the resistor fix next, from the posts in that link it appears it works for everyone.
I'll let you know how it works out.
