I have a ds-2cd4a26fwd-iz cam and I am trying to do a factory reset with the reset button, by holding it down, tried 30second and again at 60 and 120 second, while powering it on. Nothing work, it shown as active in the SAPD. I don't know the password, this is the reason I want to do a factory reset. I tried the hikvision support but not very helpful. Any idea or resolution to go about? Thanks