HP Laser Printer is continuously feeding blank sheets Solution 
If hp/canon Laser printer is continuously feeding blank sheets of paper (meaning that it will just keep spitting out blank sheets without stopping, even when you power it off and back on) you probably have a sticking pickup solenoid.  The solenoid is an activator for the paper pickup drive assembly, it is usually about as big as a thumbnail, and it’s a metallic device with a spring and a hook which clips onto the pickup roller drive gear.  These solenoids “click” on and off constantly to allow the gear to spin and drive the paper feed. There is a rubber sound dampening pad on the solenoid, over time the rubber pad tends to wear away and you’re left with sticky glue residue (or a magnetized surface) and a dysfunctional solenoid. When a solenoid malfunctions, in the worst cases the solenoid never releases and the pickup drive gear spins forever, so paper will continuously get picked up and fed through.  The pages are blank because there is no real print job being processed.For some printer models the solenoid is accessible, so if you’re the ambitious type you may be able to disassemble your printer and replace the solenoid (or at least clean the sticky solenoid and apply some fresh felt).