DCP-T300 FAQs & Troubleshooting DCP-T300 Not your product? Sort by: Updated Date Popularity 2 Results 1. 06/18/2015 The keys on the control panel do not respond or triple beep when I press them. 2. 03/26/2015 The scanner cover support has come off. (With Video Instructions) Others FAQs & Troubleshooting