It sounds like your guns are out of alignment, assuming you have a tube rear pro.
If its lcd you could be in trouble too.
Having wheeled it, you have some how taken the guns out of alignment and they will need recalibrating.
You have a user manual? I suggest checking this out as most rear pros will allow gun calibration..
I have done this before, its easy, you will be given cross hairs all over the Panel, you calibrate each color cross hair till you get a white x, this is done by moving the green, red or blue over each other 2 remaining colors..
It is time consuming, but then end result is worth it.
3 colors, Red Green and Blue make white or black, depending on the color of the cross hair the manufacturer is displaying..
It is just a matter of getting all 3 cross hairs over each other, generating a newer color..
These cross hairs will be dotted all over the screen, in a unformed fashioned so you can calibrate the screen..
You are just aligning the guns as I said before..
Hope this helps..