Just to follow up, when I reassembled the 575 today the missing red hue problem apparently solved itself. I've booted it about a dozen times and the monitor output has been perfect, no missing colors and crisp as can be. I guess it probably was just a loose connection somewhere (I also dusted the bottom of the analog board, not sure if that would relieve problems with bad solder joints in the event there were any). But I'm grateful for the help here. Maybe before I ship out I'll throw up some pics, or at the very least post here from the computer (once the keyboard stops acting up perhaps).