There have been a number of posts about it “doing nothing” that turned out the power was accidentally at 1 , so definitely check that (the head will move through the motions because it’s “on” but at a power of 1 the laser won’t cut or engrave anything)
As far as the alignment - once you get it cutting again - there are a few posts about ways to check exactly how off your alignment is, but if it changed while you away I’d double check first that everything is on track and there’s no crud on your tracks either - then try one/more of these (read the comments as well as the original post):
Good luck!