Does anyone know what low testosterone symptoms are in boys who haven't reach puberty?

I was told a year ago my son was aspergers, now they say he doesn't have it. That it might be epilepsy. They said that he has low testosterone and refered him to a specialist but they won't say if his "asperger like symptoms" are caused from the low hormones. Please if you'r not positive of your answer do not reply, Im so worn down by wrong information. Please help me try to find some answers.
Thank you,
Tex