The paper jamed comes on, there is no paper in the
If this is only happening in one section of the printer, such as when feeding paper into the upper automatic document feeder (ADF), then look for an obstruction in that area. The ADF has page sensors in the roof of the feed cover that senses the page when loaded. This is a plastic fork-like sensor that is spring-loaded. Sometimes the spring pops of or one side of the plastic tabs that holds it gets broken. In such cases, it may think a page is not loaded when one is, or vice-versa. If the jam error comes up only when you try to print from the lower tray, focus on that area:1) Turn the printer OFF and unplug the power cord from the rear of the printer or from the wall and unplug the USB cable from the computer.2) Wait 3 minutes to give it time to forget the error, then plug it back in and turn on the power. If the error is still there it is a physical obstruction or a jammed/jumped gear tooth, or something may be broken. Do the following:1) Use a flashlight and magnifying glass to closely examine the shaft, gears and page sensor to see if anything looks out of place.2) Turn the printer upside-down and shake while listening for anything that may be loose or broken, such as a spring or piece of lever, or foreign object like a paper clip, etc.3) If nothing is heard or seen, remove the back door and reach inside the rear access area. Using your thumbs, rotate the rubber rollers on the shaft in whichever direction they will move, as far as they will go.4) Replace the back door firmly, the try to print again.If after going through all the above steps the jam error problem is still showing up, you most likely have a mechanical component that is broken, e.g. gear tooth, sensor, or spring missing. This would require service from an authorized hp service center, which you can find at hp.com Support online.
