Default Help not working iconia A500 after hard reset?

can some one help please. my son had put a password on my a500 and could not remember what it was, so used the buttons to do a hard reset and i got a error saying UNRECOVERABLE BOOTLOADER ERORR (0X19000008) and now it wont start and hangs on the acer logo.

its never being flashed with any rom or rooted,( never needed anything like that)

im quite new to all this guys and could with some help to fix it