You will need to try this: HP Tech Support.***-***-****, try them, they used to be free;-)
But do you have a the user manual?
If not here is a free copy as well, please visit this link: http://www.manualslib.com/manual/274569/Hp-Deskjet-5740.html
also from the manual, please see this page on clearing the paper jam;-)
In any case, I will stick with you until this is complete.
Please rate my service thus far.EXCELLENT (5 Stars) would be greatly appreciated.
Also it is the only way I am credited for my time and expertise with you.
Once you rate, I will be notified and will add your question to my priority list so you can reach me anytime until this problem is solved.
Then you can reach me by simply replying to this message anytime.
Thank you and have a great eve!