Hello, I'm Wes, and I'll be assisting you today.
When this error appears, it means the inner cover (the cover of the disc tray) is open.
Try to open and close the tray.
That is a bit more serious error code.
Let's try to reset the error.
Turn off the printer, and unplug the power cord of the printer from the power supply.
Plug the printer back in and turn the printer back on.
Let me know if the error still displays.
Unfortunately, Error 6000 that means that there is an internal hardware error that cannot be reset.
Since the printer is still under warranty, you will need to contact Canon Warranty for a replacement printer.
Here is the link for the Canon Warranty.
Let me know if you need additional help so I can assist further.
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