PT-D400 FAQs & Troubleshooting PT-D400 Not your product? Sort by Updated Date Popularity 3 Results 1. 11/16/2018 The screen ‘locks’, or the printer does not respond normally. 2. 11/16/2018 How do I initialize and clear the printer to factory default settings? 3. 11/16/2018 How do I clear the current format settings and/or the text on the display? Machine FAQs & Troubleshooting