mad2dmax

I bought my IFI about 5 years ago and in all that time, it has been used very infrequently. Months can go by literally before I fire up the unit and only then, I would listen to it for no more than an hour. The whole point of this preface is that I now find myself with a "dead" unit. I've checked the fuse , replaced it just to make sure it's not blown and still no signs of life. I am not electronically savvy but a fuse, I can handle. Beyond that, I have no clue. Does anyone have the same issue?