Hello 
  
I got my hand a DVR from China (probably) which I need to reset the password. 
  
I tried suggestions like: 666666, 888888, etc.. 
  
I got a S/N on the back of the DVR which is: JA2004130100009812 
  
There are some pics from the login page (VGA connected) and front of the DVR cover 
  
If any can help me on how can I reset the password via a tool or something similar I would be so thankful