Out of step with the board room?
Falling out-of-step with the boardroom? That's not an IT problem; getting along with the boardroom is a management problem.
Is the management problem because other departments have more women? I suppose, then, the reason IT doesn't need more of certain other "underrepresented minorities" yet is because the other departments don't have many of them in top management, either; is that it?
A better reason for recruiting more women into entry-level IT roles is that it will help attract the best male IT workers to the company. Many of the best ones techies are slightly autistic and have trouble meeting women; the opportunity to meet women at work would be a big recruitment attraction.