Default Helpppp with my asus memo pad hd 7

After a system update the front camera of my Asus Memo Pad HD 7 stop work, and when i try to use it, it just closet and dont let me take pictures or use as web cam. PLEASE TELL ME HOW TO FIX IT BECAUSE I HAVE LIKE 2 MONTH WITH THE SAME PROBLEM.

PD: i did a factory reset and nothing happen, i keep with the same problem