I have a dvr of unknown brand. When i placed a order for it about 2 years ago i put in hard drive , tested it to make sure it works. 
  
Apparently any password it had that the manual stipulated worked at one time, but does not now. I dont know if I changed it and forgot it, but seems there should be some way to hard reset it manipulating the motherboard or something. 
  
I went to set it up today and no password works.  
  
2408sv is on a sticker at bottom 
upc code reads 6904420120215 
  
also across the top of the middle circuit board it says 
VB9708 Ver:3.0C 3030440133 244-m4c2972A0 
  
I took the cover off and found 
DVR-MB-101(e) 
2010-09-07 
on the botoom right of the circuit board. 
  
the manual says the password should be 88888888 and this does not work. 
  
  
  
I have no contact number in the book, or anything , seems like some generic dvr manual for 4/8/16 and says H.264 and thats it. 
  
I have tried all the typical 123456 , 111111, 888888 and im litterally sitting here just going thru numbers trying to guess it, but is there anyway by lettering on motherboard to figure out what might be a master password? 
  
  
  
Any help is appreciated. 
  
Email: anatolis007@gmail.com