Lexmark MS821
After upgrading the firmware to a 230.xxx level, printing via USB is no longer working.
The (Copy 1) printer instance is the new working printer object to use if you are using IPP over USB for printing.
If the issue persists, search for more information related to this issue or contact support for further assistance.
激活后置 USB 端口来将计算机或其他外围设备连接到打印机上。
了解当打印机未能识别出闪存驱动器时怎么办。