you may have to bleed the air from the fuel line. I'd search this site for that question to see if someone has covered it.
you can take it out of the dash or disconnect the battery and reconnect it, however when you restart the radio it will ask for a code which is most probably in your owners manual. please be sure you check you have this pin before carrying out these methods. you could probably ask a Honda dealer for a slightly safer method and if you don't have a code you should contact your local Honda dealer