MFC-590 FAQs & Troubleshooting MFC-590 Not your product? Sort by: Updated Date Popularity 2 Results 1. 17/09/2014 Why are my sent faxes always received with a black vertical line down the page? 2. 20/07/2007 How can I remove horizontal white lines and other flaws from documents printed on my Fax/MFC? More FAQs Fax FAQs & Troubleshooting