Thank you for your interest in Mint
To help you solve your problem we need to know exactly what Mint you use.
By that I mean version (like Celena or Daryna or numerical if you prefer) and edition (main = Gnome, KDE or some of the Community Editions like xfce or fluxbox or the mini edition)
We also need possible error messages, exactly as they appear
We also need information about your hardware. You can obtain that by running
in a terminal
If it is something connected to USB you run
and similarly for other 'buses' like pcmcia....
To copy from a terminal mark (with the mouse) and right click
Then paste into a code box (it does not use as much space then)
Don't fix it if it ain't broken, don't break it if you can't fix it