How to un-jam model 390 swingline stapler

SOURCE: Swingline Stapler Staples Only After You Open It Up....

When you lift up the top of the stapler (as though you are going to put staples in), does the pusher slide freely back and forth? It might be getting stuck at some point and not pushing the staples (either due to a worn pusher spring, or friction). First (after removing the staples) try spraying some light oil on the mechanism and lifting the top part of the stapler up and down a few times and observe how easily it moves back and forth. Also, with the top open try GENTLY sliding back and forth a little - if it slides fine with no sticking, try loading staples and using stapler. If it slides ok, but doesn't quickly return to it's "normal position" when pulled so as to put tension on the spring, rhen the spring may be worn and need replacing.

SOURCE: I have a Swingline Optima Heavy duty manual

You may nave too many staples remove half of them and see it that helps

SOURCE: Swingline optima 45 electric stapler cartridge won't reset

call gbc 1-800-541-0094 it has a 5 year warranty. they will send a new one.

SOURCE: Stapler (Swingline 211xx) has jammed. It is electr...

Turn the stapler over, remove the batteries, then remove the black pads and the four screwa under them. Take off the bottom cover and you will see the clear tabs of the cover sticking through the bottom plate. Pust them with a screwdriver toward the center of the stapler while squeezing the cover from the other side. Chances are that you will find the plunger that drives the staples is misaligned. Bend it gently forward or back until it moves without binding. Good Luck!

SOURCE: An office dummy put regular

There's a rectangular opening at the front end of the stapler. You can insert a rod that fits in the opening, and push the staples back out if they're not hopelessly jammed in-place.