It is best to try your support site or your owners manual for help, this site has owners manuals and service manuals, that will answer most question. This is the site for owners manuals...
http://www.retrevo.com/samples/index.html This site is free...
This site will help with problems, search it's index for your problem, http://www.ccl-la.com/blog/ This site is free...
http://www.pchelpsoft.com/hh-online/p/USB%20Device?gclid=CIi_3fiZ7bYCFVN0MgodLlkAGQ
If this does not help try a web search,that will do the trick most all the time if you hang in there, it is all on the web.
I enjoy this forum, like to help when I can...
I have been a tech for many years.