RJ-4040 FAQs & Troubleshooting RJ-4040 Not your product? Sort by Updated Date Popularity 2 Results 1. 18.11.2020 The printer cannot communicate with other devices via Wi-Fi® or Bluetooth®. 2. 22.10.2020 Wi-Fi® indicator is lit in blue but the printer cannot communicate with other devices via Wi-Fi. Connecting to a Computer FAQs & Troubleshooting