Print starts halfway down page - Konica Minolta magicolor 2430 DL Laser Printer

check your media, proper setting not metric versa inch. A4 is 8x11 1/2.

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Is your hard drive on your computer full or nearing full? Could be a spooling issue because of limited memory.

You didn't say that you swapped out the toner.
Let's come back to that point later.

Put paper in the manual feed tray.
Print something.
As soon as the paper feeds halfway into the printer, open the top cover.
Pull out the toner, look down at the paper. Is it mostly black?
If the answer is yes....replace the toner.
Vacuum out the inside of the printer and print again.
I think you have a bad toner cartridge

Please check your ink cartridge. If it is old change it. Also clean the nozzles. After doing this print the test page.

Replace Drum /cleaning pads in side of drum is not cleaning on every cycle.

When you want to print both sides of a page, when you go into the 'Print' command click on 'Properties' and another windows opens. Select 'Print Layou' and you will see a box marked 'Two-Sided' - click this box. The other option is if you want to flip from the top or turn from the side, like a book. Select which way (I use side flip) and click OK, which brings back to the start and click OK to print. Once the pages have printed you will still need to rotate the pages and place them back in the printer; there will be an instruction page printed halfway thru to show you which way to place the balance of the pages in the printer.
Might sound tuff, but once you've done it a coupla times, you won't even need to print the halfway intrsuction sheet. Good luck. Cheers.

is the form tear off on?
if it is try changing it to off

Have you tried lowering the resolution of the scanned document?

You need to replace the fuser. What is occuring is the teflon coating on the heat roller is worn and picking up some of the image off of the page and repeating it in a ghose like fashion.
Not a difficult replacement.

Set your printing job in print preview you can adjust inexact spaces in four corner of sheet of papers./ do't print w/out prvieew
it will wasting ink and papers.