Windows

The pickup rollers should have rough surface. If they are slick, very smooth, they should be replaced. HP recommends cleaning with cloth and warm water. If this works it usually will not last long. You can use alcohol pads as last resort to get backin service.

The following is from:

http://www.depot-america.com/TechSupport/paperjamsolutionsforthehp.htm

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1. Isolate the jam by determining where it is occurring. This sounds much easier than it looks because a jam can be caused by more than one thing, and some jams do not occur frequently enough to be isolated. Solid failures are easier to isolate. Is it happening as the paper goes in, while it?s coming out, or somewhere in between? Turn off the printer?s power if the jam is far inside the printer. You can tell how far along the jam is by how much of the paper has already emerged onto the paper output tray. If you see only an inch of paper poking out??or none at all??chances are there?s some ugly stuff going on in the inside of the printer. You don?t know until you look inside whether a part was merely out of place, constituting an isolated incident or whether internal wear and tear has been building up for a long time, which means you have a festering problem on your hands.

2. Once the jammed paper is discovered, grasp it firmly with both hands and pull straight so the paper doesn?t tear. It is very important to use both hands, leveraging your strength on both sides of the paper because you could create more problems if it tears inside the printer.

3.If the paper happens to rip, rotate the gears by hand to back the remainder of the paper out of the printer.

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This will sound strange, but start by replacing the paper. Open a sealed ream of paper, load the tray, and the problem may disappear. Often either damp or very dry conditions can affect your paper so that it feeds poorly.

Another paper-related thing to check is whether you recently changed paper brands or specifications. Some lightweight or slick papers are just more likely to jam than the "standard" copier papers.

If it is not the paper, look at the last roller(s) that touched the paper,and how the roller(s) touch the paper and are tensioned. That is a good place to look for a mechanical problem.

Good luck.