There are multiple possible problems with your printer.
1st: You may have formatted the document or item you are trying to print incorrectly. If you are printing from a web browser, make sure that you have selected the right area you want to print and preview it before you print it.
2nd: Your ink cartridge may also be obstructed/blocked by a foreign object.
3rd: Your cables connecting the computer and the printer, or some internal cabling may be damaged, and would require a replacement or a repair.
If you need a more specific answer, please provide more information.