Factory Default Reset Nova 436Q

How do I factory reset a Nova 436Q. I purchased one 2nd hand that was supposed to have been factory reset. I can ping it on it’s default of 192.168.150.1 when I’m .2, but can not bring up GUI. I connect it to a DHCP network and can see an IP assigned to it’s MAC, that IP is pingable, but can not bring up GUI. Tried http and https. I even ran nmap to scan all open ports. It says http and https are “filtered” and one other port open 7547. Browsing to 192.168.150.1:7547 does not bring it up either. Any other suggestions or ideas or how can I factory reset this while not in the GUI?

PORT STATE SERVICE VERSION
80/tcp filtered http
443/tcp filtered https
7547/tcp open cwmp?

Thanks.
Scott