A number of things can cause your printer not to print. Ask the following questions:
1. Is the printer plugged in?
2. Is the printer online? Many printers have an On-line LED/LCD and button. If the printer isn't online it will not print.
3. Is the Ink cartridge, or Toner cartridge full? Some newer printers will stop working completely if they detect an empty cartridge. Most will at least give a warning.
4. Does it have paper? Be sure the paper is installed correctly, and there is enough for your print job. Most printers can detect when they are out of paper. When using form-fed paper it is possible to get an out of paper message if you do not have the paper inserted aligned correctly.
5. Is there a paper jam? Paper jam will stop a print job in mid-stride. When you get your printer always read the manual on how to clear a paper jam. There are many parts that can be damaged inside your printer by being rough while clearing a paper jam. This is especially true with laser printers.
6. Is the printers' memory full or corrupted? Try turning off the printer for a couple of minutes, and turning it back on