Check to make sure that it is plugged in to a working outlet. (Unplug it and plug in something else there, like a lamp or radio, to make sure it is getting power.)
If the outlet is working, try pulling out the battery and putting it back in. - If you're uncomfortable doing this, just contact tech support.
-- If a forum member gives an answer you like, give them the Kudos they deserve. If a member gives you the answer to your question, mark the answer as Accepted Solution so others can see the solution to the problem.