I thought I had aligned my V35, but moving the head down to print a small 5x5 resulted in an unsharp image...I fixed it yesterday and everything looks good now.
Not wanting to insult your intelligence, but have you followed the auto focus alignment correctly and checked the very simple things like:
closing the neg carrier
making sure that everything is tight and in position above the lens.
raising column to highest position and checking autofocus using the technique in the above link?
Sorry I can't help with anything more technical, but if the enlarger is not as decribed I would maybe ask for a refund. It does sound as if it has taken a serious knock. The V35 is listed on feebay every week.