Hello but at home it only unlocks the locked account it does not delete the password. After having followed the procedure when I connect to the dvr with the "admin" identifiers and "empty" password incorrect password Here is what I tried without success.
Here is the source link of the procedure I followed https://www.fixya.com/support/t26556129-sannce_dvr_dh81nk1t_am_lock_out_need.
Thank.