Hi jolorrose,
You still might be able to find the paper jam hidden in one of the access areas, or somewhere in the carriage. Please try the document steps below, if that doesn't help, I'll also post the links to HP tech support.
You can contact HP support in North America at 1-800-474-6836 or find the local telephone number for your country here: http://welcome.hp.com/country/w1/en/support.html Please look for the category "Technical Support After you Buy"