Brother all in one printer DCP T300 shows MAINTENANCE 4 symbol, unable to take printout .
Brother dc t 300 error maintenance 4
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Re: Brother dc t 300 error maintenance 4
Whether this applies to this model or not, I don't know, but, first hit using Google:
'Maintenance 4' appears on the display
or this one:
'Maintenance 4' appears on the display
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