Hi Big Luigi here and a forum newbie. I came across your thread while looking for a silverline website and had no joy, but being the kinda guy I am decided to join your forum and lend you a hand. I can confirm you have the Silverline DVR but what model I don't know. I looked for a jumper around about the battery where you can normally restore the CMOS settings but to no avail. I also see there is a jumper to the right of the HDD cable socket??? I have the instruction manual and the factory set default P/W is ADMIN: (NULL) / MANAGER: "1"/ USER1: "2" ~ USER8: "9" I have typed it as is from the book hope it means something to you it means nothing to me. Admin can change the P/W as can the manager and the user cannot. As for the Menu, this seems straight forward enough other than that it has been somehow been disabled or maybe it's F... Fu... Fuu... inoperative!
Hope something here helps.
Big Luigi.