May be the following reasons, you can check the solution:
lack of ink or toner, which is necessary to check the ink cartridge for replacement;
print nozzle is clogged, the implementation of the cleaning operation, and check whether the printhead is damaged;
if it is a laser printer may be damaged equipment caused, they need for professional maintenance.
Lack of ink or toner , the page printed font is not clear, cause the ink has run out. Treatment measures: Inkjet check whether the ink cartridges still have ink, if run out please replace it.
The same to the laser. In addition, you can also take a paper towel (handkerchief paper to wipe your mouth, not A4 paper), take out the cartridge, print it on the paper to see if there will be ink printed on , if there is, that is the cartridges are bad, or there is no ink.
In addition, the new cartridge must be used before tearing off the cartridge's yellow tape, you must remove this seal and then installed on the printer to print normally.
Printhead is blocked processing measures: You can perform printhead cleaning operations to see if the printer's printhead is blocked, and print a test page to see if the printhead can work properly.
Open a document (such as opening a Word document), put a piece of paper on printer, click on the menu bar "Print", there is a print window: Properties - Application Tools - print head Cleaning - start - cleaning, if you still can not print, it caused by bad print head.
Other problems with laser printers if the laser printer, it may be some errors in the laser scanning system. Treatment measures:| For example, the laser mechanical shutter did not open, the laser scanning system in the lens, the mirror is contaminated, the laser generator is contaminated, the scanning motor is damaged and so on, these cases are more complex, it is recommended that a professional master repair.
The answer applies to most printer models such as MG3680 / Canon series.
