Lexmark E450dn will not power on, power cord is working

This issue may be due to one of the following:

• An incorrectly set power switch.
  
• An improperly functioning power outlet, surge protector, or power supply backup.
  
• A poorly connected power or data cable.
  
• A defect with a third-party (i.e. non-Lexmark) option such as a memory card.
  
• An incorrectly connected or malfunctioning optional paper tray.
  
• A malfunctioning printer component.

Please try the following steps:

Step Action 1 Make sure the power switch is in the "on" position. If it is, power off the printer. 2 If your printer's power cord is plugged into a surge protector or uninterruptible power supply (UPS), unplug it and connect it directly to a grounded wall outlet. Some of these devices can interfere with consistent electrical flow and cause the printer to fail to power up properly. 3 Disconnect the power cord from the back of the machine and then reconnect it. Make sure the power cord is plugged in all the way. 4 Disconnect any data cables (parallel, USB, Ethernet) from the rear of the printer. Any defect in a data cable may cause an electrical short circuit that could cause a loss of power to the printer. 5 Turn the printer on, this time with only the power cord connected and plugged directly into a grounded wall outlet. 6 If the printer still fails to power up, power off the printer once more. Verify that the outlet is working properly by connecting another device to it to see if it receives power. You can also try plugging the printer into a different grounded outlet. 7 If possible, try another printer power cord. 8
Verify that the printer is the correct voltage type for the environment in which it is being used. A 110V (low-voltage) printer will not work properly in a 220V (high-voltage) environment, and vice versa.

• NOTE: Look at the rear of the printer and locate the electrical specifications sticker. Verify that the voltage rating on the sticker is the correct voltage for your printing environment (i.e. 110V or 220V).

9
Remove any third-party (i.e. non-Lexmark) options, such as memory cards, as they may interfere with proper printer functioning. Also remove any paper-handling options such as an optional second paper tray. 10
Attempt to power on the printer once more with all options removed, having verified that other devices work from that power outlet.
If there is still no power, the printer may require service to fix the issue. Please contact Lexmark Technical Support or a local service provider.