recording lcd video monitor

I've not yet done any recording of an lcd screen with our panasonic HMC150 until yesterday. I noticed in the preview window that the screen being recorded shifted from a blue hue to a green hue and back and forth. I was hoping it was just something in the preview window but when I checked the footage this morning sure enough it was there. Fortunately I'm just doing some test recordings before we do the actual recordings in a week so I have some time to hopefully figure out what's going on. Does anyone know why it would do this and is it a setting I need to change on the camera? Thanks!