Dark Vertical Lines occur when printing (not copying or scanning).
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NOTE: For more information, please see KB Solutions ID: SO4835.
Please contact Lexmark Technical Support if you need additional assistance. NOTE: When calling for support, you will be asked for your machine/model type and serial number (SN). If you need help locating these, please click here, (C54x / X54x).
Please call from near the printer in case the technician on the phone asks you to perform a troubleshooting task on the printer.