The Control panel goes Black and does not respond or Light up

1

Lightly touch the display panel and see whether it lights up. If the screen responds, it may just be in 'sleep' mode. Otherwise, proceed with the next step.

2

Power off the printer and allow it to sit powered off for ten to 20 seconds.

3

After ten seconds or more, power on the printer again. See if the display panel powers on correctly.

Important! Do not power the printer off and on too quickly. Doing so can cause a power issue with the display panel and create this issue.

• If the display panel powers on correctly, but the printer still exhibits the same behavior after some time has passed, the Universal Integrated Circuit Card (UICC) code on the device may need to be updated. See the section How to Check and Update the UICC Code below.
• If the display is readable, but simply too dark to read easily, you may be able to correct the issue by increasing the Screen Brightness setting. See the section How to adjust the LCD Brightness setting below.
• If the display does not does light up at all, there may be a failure with the power supply. See the section How to Check for Failure of the Power Supply below for instruction.

1

Check the current UICC code level of the machine using either of the methods below:

• Printing the Menu Settings Page


1. Press the Menu button button on the Printer’s Operator Panel.



2. Press the scroll left button next to Reports.



3. Press the scroll left buttonnext to Menu Settings Page to start printing



4. Look for the UICC code level under Device Information. Click here to see sample.

• Using the Printer’s Embedded Web Server (EWS)


1. Launch Internet Explorer (or any other Internet browser).



2. Enter the printer's IP address into your browser's address field.



3. Click on Reports.



4. Click on Device Information.

• If the printer’s UICC code is v5.53 below, proceed with Step 2.
• If the printer’s UICC code is already v5.53 or above, contact Lexmark Technical Support for other troubleshooting steps.

2

Download the latest code from Lexmark Support website. Type X792 as your Authorization Keycode and press enter. Save the file and extract it on the same directory.

3

Update the printer firmware. Please refer to Firmware Update Instructions for steps in updating the printer firmware.

1

At the Ready screen, press the Menu button button in the lower right-hand corner of the touch screen. A series of menu choices should display.

2

Press the scroll left button next to Settings. A new set of menu choices should appear.

3

Press the scroll left button next to General Settings. Another set of menu choices should appear.

4

Look for Screen Brightness. If Screen Brightness is not showing, press the scroll down button until you see the Screen Brightness setting.

5

The current value for Screen Brightness will be displayed. The number should be somewhere between 20 and 100.

• If the number is less than 100, press the scroll right button and increase this number to 100. Press the Submit button in the lower left-hand corner to save the new value. If this corrects the issue, press the home button button to return to the Ready screen and continue using the printer as normal.
• If the Screen Brightness setting is already at 100, or if increasing the Screen Brightness setting has no effect, you can try resetting the printer back to its factory defaults as a last resort. This will reset all user settings on the printer. To do this:


1. At the Ready screen, press the Menu button.



2. Press the scroll right button next to Settings.



3. Press the scroll right button next to General Settings.



4. Look for Factory Defaults. If Factory Defaults is not showing, press the scroll down button until you see Factory Defaults.



5. 'Do not Restore' should now display. Press the scroll right button once and change this to 'Restore Now'. Press the Submit button in the lower left-hand corner. The printer will reset all user settings back to their factory default values.

   If the display panel remains dark after this, please contact Lexmark Technical Support for further assistance.

• If none of the options resolve this issue, the printer may require a service action. For additional assistance, please contact Lexmark Technical Support.

1

Power off the printer. Wait ten to 20 seconds, then power it on again. The motors within the printer should turn within the first minute after the printer is powered on. If this occurs, the power supply is working.

If the printer is getting power, but the touch screen display still fails to light up, the likely cause is display panel failure or failure of one of its connecting cables. This requires a service action to correct. Please contact Lexmark Technical Support or a local authorized service center.

2

If the printer remains silent, look for any LED lights that are on.

Notes:

• If the printer is connected to a network, you can check to see if the network communication light is on. To do this, go around to the back of the printer. Look where the network cable connects into the printer.
• If you see the network communication light is lit, or any other lights on the printer are lit, the power supply is working.
• If the power supply is working, but the touch screen display still fails to light up, the likely cause is display panel failure or failure of one of its connecting cables. This will require a service action to correct. Please contact Lexmark Technical Support or a local authorized service center.

3

If no lights on the printer are lit and the printer makes no noises at all on power up, verify the power source.

• If the printer is connected into a power strip, try plugging the printer straight into a wall outlet.
• If the printer is plugged into a wall outlet, test the outlet by plugging another device, such as a lamp, into the outlet or plug the printer into another location.

4

If you confirm that the power source is good, the power supply on the printer may be failing. This will require a service action to correct. For additional assistance, please contact Lexmark Technical Support or a local authorized service center.