I currently have a Mac Pro with an HP LaserJet 2015d connected via USB. Everything has been working fine until the past couple of days. Everytime I go to print something, my computer says that the printer is currently offline. I turn the printer off and the back on and it will print the job. However, once the job is complete and a few minutes have passed, the printer says it is offline again. Can anyone offer any suggestions on how to fix this problem. Thanks in advance.