My Lexmark 4550 won't turn on. When I plug in the black power cord, the green light turn on, but my printer won't turn on when I press the power button.

Check with Lexmark to see if there is a reset button for unit

A quick fix for most communication errors can be achieved by resetting the printer and/or rebooting the PC. Simply disconnect the printer from your computer (if USB connected)> reboot your pc > unplug and re-plug the printer into the power source to reset it. When the printer turns on, reconnect it to your computer (if USB connected). Then try to print again once the computer fully recognizes the USB connection or when the WiFi light on the printer turns solid green (if WiFi connected.).

If that doesn't help, try the steps below:

1. Disconnect the USB cable connecting the printer from your computer.
2. On your computer, go to Control Panel > Printers and Faxes.
3. Delete the Lexmark print object.
4. Reboot computer.
5. Re-brick your printer by pulling out the power supply - black box where the power cord is plugged into on the back of the printer, and re-plug after 30 seconds.
6. When the printer turns on, reconnect it to the computer.
7. Wait until your computer fully recognizes the USB connection. To check, go to Control Panel > Printers and Faxes. If you see a new Lexmark print object in the list, try to print a document to verify that the problem is fixed.

A quick fix for most communication errors can be achieved by resetting the printer and/or rebooting the PC. Simply disconnect the printer from your computer (if USB connected)> reboot your pc > unplug and re-plug the printer into the power source to reset it. When the printer turns on, reconnect it to your computer (if USB connected). Then try to print again once the computer fully recognizes the USB connection or when the WiFi light on the printer turns solid green (if WiFi connected.).

If that doesn't help, try the steps below:

1. Disconnect the USB cable connecting the printer from your computer.
2. On your computer, go to Control Panel > Printers and Faxes.
3. Delete the Lexmark print object.
4. Reboot computer.
5. Re-brick your printer by pulling out the power supply - black box where the power cord is plugged into on the back of the printer, and re-plug after 30 seconds.
6. When the printer turns on, reconnect it to the computer.
7. Wait until your computer fully recognizes the USB connection. To check, go to Control Panel > Printers and Faxes. If you see a new Lexmark print object in the list, try to print a document to verify that the problem is fixed.

You may also try to update your printer driver by visiting the Lexmark website at http://bit.ly/nJ7AgN. Select your operating system, download and execute the file.

Try this approach:
1. Remove the power adapter from the printer. The power adapter is the black box where the power cord is plugged in at the back of the printer.2. Disconnect the power cord from the power source.3. Reconnect the power cord directly to the power outlet in the wall. Bypass any surge devices or power outlets.4. Re-plug the power adapter into the printer.5. If the printer won't automatically power on, press the power button on the printer operator panel.
I hope this helps.
Should the problem continue, please contact Lexmark Technical Support Center for additional assistance.

Please try the steps below:

1. Re-brick your printer. Pull out the power supply, black box where the power cord is plugged in at the back of the printer.
2. Disconnect the power cord from the power source. Re-connect after 30 seconds to a different known working power outlet. Bypass any power surge devices or power extensions/strips and directly plug in the cord into the power outlet in the wall.
3. Re-plug the power supply into the printer.
4. Press the power button if the printer won't automatically power on.

If the problem continues, please contact Lexmark Technical Support for further assistance. Thanks.

Try to unplug the power adapter from the printer.


Then unplug the power cord from the power outlet. Wait at least 10 seconds before re-plugging the power cord into the power outlet in the wall (bypass any power strip) and the power adapter into the printer. This will give enough time for the printer to reset itself. If printer won't automatically turn on, press the power button. If that doesn't help, please contact Lexmark Technical Support Center for additional assistance.

Try to unplug the power adapter from the printer. Disconnect the power cord from the power outlet in the wall.


Wait at least 10 seconds before you re-plug the power cord into the power outlet (bypass any power strips or surge devices). Re-plug the power adapter into the printer. If printer won't automatically power on, press the power button. If that doesn't help, please contact Lexmark Technical Support Center for additional assistance.

Try to remove the power adapter from the printer. Then unplug the power cord from the power outlet in the wall.
Wait at least 10 seconds before re-plugging the printer into the power source (bypass any surge devices or power strips). Reconnect the power adapter into the printer. If printer won't automatically turn on, press the power button. If that doesn't help, please contact Lexmark Technical Support Center for further assistance.

Unplug the power supply from the printer. The power supply is the black box behind the printer where the power cord is attached. With the other end of the power cord still plugged in to the power outlet, the power supply of your Lexmark X5650 should have a green light on around the silver contacts. If not, you might have a defective power supply. If that's the case, I suggest you contact Lexmark Technical Support for the power supply request. If there is, plug it back in the printer all the way through and in a correct position. Printer should power on automatically, otherwise, press the power button. If printer is still not powering on, it might be defective now. Contact Lexmark Technical Support for further troubleshooting.

Hi,
your power supply (black box) is working fine if it has green indicator light on. Make sure you're plugging the power supply all the way in the slot. The power supply can be plugged in an incorrect position so try to double-check that you are plugging it in correctly. Hope this helps.