How do i cancel a printing on my laserjet 1100a

It's because there has been a delay in your printing queue.
At bottom next to clock, there should be a symbol that looks like a printer, double click it and right click on the documents then you should be able to cancel them from there.

Hope this helps!

Hello,

If you had sent the document for print, try cancelling it and switch off the printer, unplug the USB cable to the printer and plug it again. Put on the printer and send the document for printing again. Make sure that no other document is pending for printing and send for print again.

Regards

Replace the print driver on the computer. You can download the latest print driver from www.hp.com. Goto Software/Driver dwnld section.

In this printer you can "CLEAR" the memory and cancel all jobs, do this first and see if this resolves your problem.

check this link,
either fuser or print drum. to verify , start print job, open door before finnished and see if marks appear before or after fuser. Before paper gets to fuser toner ink will smudge.
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=bpl70340#RepImgDef

Open the Control Panel from either the Start menu or by opening 'My Computer.' Find your Printers and Faxes folder and open that.  Double-click on the icon of the X2500; if more than one, choose the one with a check mark and double click on that icon. This will open a 'job list' showing those which were not completed for some reason, click on it (them) and delete it from the list.   

replace the fuser

it will be better if you tell the vendor for repair or replacement

look at the red cartridge do you see any dots on it ? is it only when you print? what about if it's just Blk & wht?

More information is needed! First check to see if the print job actually went to the printer. Click start-control panel - printers and doubleclick on the 2600n. Are the print jobs sitting there waiting to go out to the printer? If so, your problem is probably in the computer or the cable leading to the printer. Look for an error message in the title bar of that window. If present, it will give you a good idea what is wrong. While there, use the first menu item (printer?) to "cancel all jobs". That can take a while, even a restart. There should be a "pause printing" item. If this has a checkmark beside it, choose the item to uncheck it. In the same menu, check the "set as default printer" item. If that isn't checked, when you print you must choose the printer. So you can't just click a print icon, you have to pull down the file menu, choose print, and then the 2600n in the dialog before clicking the print button. HP printers have a utility program that can tell you what is going on. Click start, look for Hewlett-Packard or HP, then the printer name and finally something like "HP Laserjet utility". Look for error messages which give some idea what is wrong. Could be an empty cartridge, for example.