From your description, I don't really think reimaging will work. If the power light isn't coming on when you try to turn it on, then odds are it is a different problem. But, it won't hurt to try, so I have sent you a PM with the link to the image.
Other things to try are:
- Charge it for a couple of days. A lot of people have had seemingly dead Kobo's, left them on charge for a while and came back t find them working.
- Pull it apart and check connections and the switch. When I've opened my Touch or Glo, I always messed up positioning the switch correctly and have to open it again to fix.
- If it is a refurb, what is the warranty status? If it is still covered, I would be taking it back.