When printing from a gmail dowload the printer prints the text twice with a small offset so the text is blurred. OK when printing MSWord docs. Lexmark 4650. Toshiba Laptop Win7

one ore more color ink cartridge are bad

It could be a driver issue. Try to uninstall your existing printer driver from your computer. Go to Start menu > All Programs/Programs > Lexmark 4600 Series folder > Tools > Uninstall. Reboot your computer when prompted. To reinstall, please visit the Lexmark website at http://bit.ly/iofMNC.
However, if printouts are ok from any other applications on your computer except from your email, then it could be in your email settings.

Print head is not aligned properly . You need to adjust heating plate on head.

ok..first you will need to print the nozzle check and see if all the color are printed out fine.. this feature is under the printer properties , under the utility tab.... assuming all your colors nozzle are printed fine..then the next thing for you to do is do the Print Head Alignment.. it's under the same place where you print the nozzle check.. when you press the Print Head Alignment, it will print a page out with many lines.. choose the one with the best alignment.. once u done that..try printing the image again..
oh..if your nozzle check print out is not good.. then you will need to perform head cleaning to clear the clogged head..

try a different driver pcl5 or pclXL or just
re install it

you still have a piece of paper stuck some where in the paper path have a closer look

Try this !
in the software application you are printing from
Open the document that you want to print.
2. On the File menu, click Print, and then click Setup, Properties, or Preferences.

Look for a Best Mode Setting
this printer has several modes one being draft mode, another one best mode
in best mode the printer uses memory to render the photo you are trying to print.
Note that in this mode, printing takes
longer and more memory is required from your computer.
from page 17 of the hp k5400 user manual

Also you may have to increase the virtual memory of the windows pc to allow the computers hard drive to allocate more hard drive memory to the memory swap file if the computer's ram is not enough to print the photo.
It is a setting in the control panel under system - performance.

Hi, check the nozzle and test , if the result not in solid color there are spaces within the color means need head cleaning after head cleaning twice test print .

Reinstall the drivers failing this goto printers and faxes right click on the icon and select properties. Select Advance tab at the top of the now open window then select print processor once in there select a different graphic mode ok and close then test.

Thanks J

Have you tried a new cartridge yet? I know it doesn't make sense at first but I suspect the cartridge has a problem and your test print isn't exercising the printer like the Word doc is. If the new cartridge works than the problem is probably poor quality ink, the hole you used to refill isn't sealed correctly or the cartridge or jets were damaged in some way.