I just purchased a hydro thunder sitdown racing game, and the screen is a bit crazy. Red, green, and black look fine, My problem is blue looks black(sometimes looks like black mixed with red), white looks yellow, and grey is like a yellow black mix. while playing it looks as though everything is red. I have fiddle with the two knobs on the tube (Focus and screen) and the 8 behind the coin door, and even the other 6 in the hard to reach place behind the monitor and nothing has really helped. Is it time for a new monitor?