Honeywell Rapid Eye question

[mateck8888 0]

Hello:

 

A local CCTV place went out of business, and I got a call to fix some of their cameras. I can not get into the DVR system. It is a Honeywell Rapid Eye HRM20CD500. When it powers up, it goes to a full screen view of 9 cameras. I have a mouse and keyboard plugged in, but I can not access any menus to make changes. Any idea how I can get to a menu? The mouse options won't let me leave the full screen mode. Just gives me some view options.

 

Any help is appreciated.