Frank Poole, I am wondering if it is the same Nook HD from your [http://www.ifixit.com/Answers/View/170948/Why+does+my+Nook+HD%27s+screen+have+frozen+pixels+or+black+lines|other question.] There is the possibility that you will need a new display, check your other question for the how to etc., If it is a different one, you may want to try a Factory Reset and see if that will help. "Hold the Power button and Home (n) buttons. The device will turn on. Continue to hold both buttons until the device shuts off once again (~15-20 seconds). Turn the device on normally. It will prompt for a factory reset. Press the Home button twice to confirm. From [http://bookclubs.barnesandnoble.com/t5/NOOK-HD-HD-Support/bd-p/NOOKHDSUPPORT|here.] Hope this helps, good luck.