The R4.0 Owners Manual includes a revamped troubleshooting section. Common tips include:
Use a damp cloth with mild detergent to clean the control head. Avoid harsh chemicals that could degrade the IP67 seals. Conclusion
Press and hold the Power key. Upon startup, the R4.0 firmware may prompt for a PIN code if security protocols are enabled. Enter the code via the keypad and press 'OK'. Selecting a Talkgroup
