Some brands of fax machines and all-in-one printer/scanner/fax/copiers need the ink cartridge to be present and have some ink in it to perform functions which don't actually require ink.
My dad bought a Brother all-in-one, and he is unable to scan or send faxes unless he replaces an empty ink cartridge first. If you have a Brother fax machine, I'd suggest returning it and buying a different brand. They waste ink on unnecessary cleaning procedures and force you to buy more for stuff that doesn't need ink.
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Some brands of fax machines and all-in-one printer/scanner/fax/copiers need the ink cartridge to be present and have some ink in it to perform functions which don't actually require ink.
My dad bought a Brother all-in-one, and he is unable to scan or send faxes unless he replaces an empty ink cartridge first. If you have a Brother fax machine, I'd suggest returning it and buying a different brand. They waste ink on unnecessary cleaning procedures and force you to buy more for stuff that doesn't need ink.