Hello. This is my first post. I hope not post in a wrong place. 
  
And, the problem is, 
I have a Autocom cdp for cars china clone, and want to update. 
I thought I just need to connect autocom to computer and press update, but it shows no power supply is connected. 
I can see on the autocom device that the LINK is on but not power, it gives me 3 options or faqs 
1: no power is connected 
2: wrong com port 
3: the USB is wrong connected 
  
What am I suppose to do now?  
Please help. Thanks in advance!