If you have already tried turning off/on the printer, detaching and re-attaching the usb cable but still it didn't help, you might want to reinstall the printer driver. I recommend you detach the printer from your computer then uninstall the software. To uninstall, click on the Windows logo Start menu >Programs >Lexmark 3400 Series folder >Tools >Epson 2100 Printer Driver Download. Uninstall. Then restart pc. Also, check if your computer is running on 32-bit or 64-bit operating system by clicking on the Windows logo Start menu >right click on Computer >Properties. For the software, click on this link: (for 32-bit) or this link: (for 64-bit). Download and install the software.

Canon Mg4250 User Manual. Computer experts recommend installing latest Lexmark X3430 driver package to users who fail to install their Lexmark 3430 software CD drivers. For this reason, we have provided below Lexmark X3430 driver download links of Windows Vista, XP, 7, Server 2000 for 32bit & 64bit versions operating systems.

Hope this helps. If you need more assistance, leave a comment and I'll get back to it.

May 27, 2010 . If you are running Windows XP or Vista, you may use the generic driver for Lexmark 3400 series. All you have to do is to connect the printer to the computer and let the computer detect it. If the printer is not a Plug-n-Play device, the computer would allow you to manually select the generic driver. Or, you may check any of the links below and download the driver for your Lexmark X3400 for free: Have a great day! Dec 06, 2009 .