If you performed the physical reset above and the GX3800 is still acting up, the issue is likely , not a settings error. Here is the "unofficial" recovery code:
This diagnostic mode literally resets the digital signal processor (DSP). It is more surgical than a full hard reset and fixes issues like distorted AM reception or scrambled LCD characters without losing your saved stations. grundig gx3800 factory reset code better
Use a paperclip or thin tool to press and hold the button inside for 3-5 seconds If you performed the physical reset above and