As some others have said here, first try to clean up the printheads and align them. I would strongly recommend you clean up pogos and sensor with IPA, as well as the cavity for cartridges. Carefully clean up also the connections to the pogos in the cartridges. Then, launch the autoalignment again…See if this solves the problem.
If not, try changing the cartridges for new ones.
If not, you might need a new pogo board… If your machine is under warranty, there is no costs for you. Contact your 3DS reseller and ask them for a replacement of the pogo board…
Also, if you are under warranty, remember that once per year you need to have a maintenance visit from your reseller, who will clean up the machine, replace several parts that will make the machine work better… etc… When was the last time you (or your reseller) did a maintenance routine to your machine?
Hello! I am from Argentina.
I read your post today. I have the same problem that you had.
It’s very frustrating.
COULD YOU RESOLVE IT? Thanks for your time.
Greetings.
The main reason of this problem is a bad head alignment.
You have to clean the light sensor window.
The alignment is visible on the print.
There are 5 rings witch shows the before and after state of the alignment.