Having problems with my mini hp.. Help!! ?

It sounds like it is not booting up. Try unplugging it from the power supply and take out the battery for about 2 minutes and then put the battery back in and plug in the power supply. Start it up and if it boots normally then get anything important to you off of it and onto Flash Drive or External Hard Drive. Then take it to a professional and have it checked out. The hard drive could be failing.