Why is my mg6120 printing lines?

What program are you trying to print from?
Maybe as simple as changing the paper sizes

I want to say it stems from whatever program you are using the print. My guess would be your margins are set two inches from the top. If that's what it is it is easily correctable. You just have to check your margins and access the number back to one you want to use. Otherwise it could be your nozzle alignment which you may want to run some maintenance and try to fix the nozzle alignment.

If the first line of the half printed matter is in the same possition as on original problem with toner cartridge. or the first line is actually the first
line in original may be the problem with formater board. Anyway check for paper settings.

Have you checked the print que
Printer problems can be a real hassle.
From time to time, due to document layout or settings on your computer, in your software of choice, or even on your printer, a blank page may get "printed" with the rest of your document.
Fortunately, this issue is a simple one to troubleshoot.
Click "Print Preview" when you are finished with your document and ready to print.
Observe your document.
If you see an extra, blank page, you have created a second page.
To delete the second page, close Print Preview, go back into the document and eliminate any blank lines in your documents that you may not need.
You may also find an inadvertent page break at the end of your document.
Place your cursor on its symbol and delete it.
Locate the symbol by clicking on the Show Formatting paragraph icon in the toolbar.


Circumvent this "ghost page" if you do not see a second (or additional) blank page in Print Preview.

Specify the number of pages you wish to print, within the Print dialogue box.
This is typically done by selecting the "Print From" option, then entering the page numbers desired.
If your document happens to be ten pages (without, of course, that final blank page), then enter in the "Print From" field the numbers "1-10".
This will print only pages 1 through 10, without an eleventh (blank) page.

I think you need to do is reinstall you software driver for the print program and start with known parameters. Then you can try to clean the heads. You should get something out of the printer if the heads are plugged it might be a dot or smear on the paper.

• Copy + paste this link in your URL bar: club.myce.com/attachments/f123/260341d1374410670-cd-print-enabler-newer-u-s-canon-printers-cd-printtool-v7.zip
• To start machine in service mode, with the machine off, press and hold the ON button (do not let go). While holding ON, press the Stop button 5 times. Now release the ON button.
• Run the Print Enabler utility software that you got using the above link.
• Select a region. Press Set. Cycle printer on and off to exit service mode.
  

Do you refill ink tank? Print blank pages. Is there horizontal lines appear? It might be caused bay ink leakage. Check respiratory hole at ink tank and rubber seal at bottom of ink tank. Print blank pages until no horizontal lines and try to use new ink tank.

Nozzle check perfect? No ink drop outside lines? Cyan lines is random position. Print blank pages. It is still appear cyan lines? If yes, it caused by waste ink at bottom plate. Print blank pages more, it will clean itself.

wow..try a test page to see if the printer is happy on it's own.

Depends on whether the "lines" are colored or just blank areas missing in the print . If it is blank areas , then most likely the laser scanner is dirty and the glass needs to be cleaned . If it is colored lines , then you most likely have a defective drum .