My husband has E.D. any advice will do.

I have been married for 12 years and together for 14 years. The past few years my hubby has been experiencing E.D. At first I thought it was me. I gained some weight and let myself go due to health issues and depression. However I have corrected that issue. Then we thought it was because of medication or medical problems with him. Again these things have been changed. Doctors are no help nor are E.D. medications i.e. the little blue pill. I've tried everything I can think of. Some feed back is needed. Any ideas.....