I'm sure this has been mentioned before but the search is useless and I don't see anything on the first few pages.

I just picked up LRB cheap and I'm playing through it with my brother and sister on a 19" 4:3 computer monitor. This is a good monitor, one that I've had no problems playing RB2 on for years. But every time we activate overdrive it becomes almost impossible to see the green and red notes, especially with certain backgrounds. Does anyone have any suggestions for dealing with this?