Can't replace ink - won't center

[Gormican]

I have a Maxify MB2320.  I bought replacement ink from E-Z Ink on Amazon which said it was compatible with my printer.  I had to turn if off and on each time I wanted to print.  So I was going to remove the off-brand ink cartridges and install Canon cartridges, but when I open the door, the printer head does not move to the replacement area and the screen displays "The front cover is open.  Close the cover".  Is there a way to get the old cartridges out?

[Gormican]

Looks like this problem has everyone stumped.  Anyone have a strategy that might work to save the printer?  Otherwise, it looks like its off to the trash.  It's a bummer because it's relatively new.  I wish there was a fix.

[Michael]

Hello.

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[Gormican]

Thanks.  Finally got the answer.  Since the cartridges are under pressure, you can't remove them until they are low.