1, the printer can not work after power is turned on.
For this type of failure, we must first confirm that the printer's power switch is set to "ON", if you have placed "ON", then you have to check the power cord and power plug and the power outlet is good, if no exception But still not power, then you have to check the plugged in the power outlet is the power and the voltage is normal (with a test pen can be), these aspects if there is no problem, then you look at the printer's fuse has been blown (If the first power to check), if not blown or have been blown but re-fuse again, then the printer part of the circuit there is a short circuit fault, then if you can not find a significant damage to the components, then Looking for a professional maintenance department for maintenance.
2, the printer can not print online content on the computer.
For this type of failure, we first check whether the printer is online and then check that the canon toner is the default printer for the system - some software will virtualize a default printer (such as some fax software), then you just "Printer" folder to change the default settings on the line, if not enough, then you can check the printer driver
Whether the installation is wrong or has been damaged or has been lost, if the reload after the invalid you then check the printer's cable interface and the computer connection is wrong or connect the data cable is faulty - you can conduct a self-test print, if Can not print out to prove that the printer may be part of the internal circuit damage, then you'd better find a professional maintenance department for maintenance, if you can print out to prove that the data cable or interface is a problem, then you can change Try a new connection data cable. Of course, sometimes in the printer for some of the design of the virus will lead to the failure, so you have to use anti-virus software to try to check the virus.
3, print online data can not be completely printed.
In the event of such a failure, you can first look at the panel "Form Feed" light is on, if it is lit, then you want to leave the printer, and then press the "Form Feed" button to print the remaining The file in the printer buffer; if the printer does not display any information and the data has not yet been printed, then you should check the user software for errors.
4, the printer can not print self-test.
For this type of failure we first check the brother tn 660 in the choice of self-check menu item when it is offline, if normal, then check the tray has been installed and the paper box is not installed paper, if there is no problem You will check the printer cover is closed and check the machine with or without paper jam phenomenon, of course, if the printer's control panel shows the information, you can solve the problem for the information first. If you can not find the point of failure to find a professional maintenance department to help it.