This has nothing to due with the bulb. If you bought this used with a return I would do so. If not try adjusting the lense shift with the test cross hatch screen on and see if it helps. The only other thing is to tweek the pannels into alignment. ( I have done this with a 6100) but unless your very skilled in electronics and handy with optics You should't attempt this. This could have been caused by rough handling in shipping or it was like that when shipped. Also never by a non OEM bulb for this projector its to much of a gamble.
Smart enough to know better, to old to care