Lost admin password for Honeywell surveillance DVR

[Margie 0]

I have a surveillance hrgx162  Ds80103 honeywell dvr. I do not have the admin password. I am unable to accomplish a factory reset because I am prompted immediately for user name and password before I can enter menu. I tried disconnecting the battery but no luck. There is no reset button or hole therefore only recourse is to start from scratch. Please help me in how I can wipe everything, factory reset, my dvr and go to the default admin password. All help is appreciated.

Note: I called Honeywell technical support and they told me my dvr is too old and they cant help. They suggeated I call ADI and they would help. ADI told me they are a distribution center only and cant help.  I am at a loss 

Another thought; would buying a new motherboard help. If so what would part number be?