If the software won't open at all or crashes, right-click the .exe file or shortcut, go to , and select "Run this program in compatibility mode for Windows 7." Also, check "Run as Administrator." Summary Checklist Software won't open Run as Administrator / Compatibility Mode. COM Port Error Match Port # in Device Manager and Software. Radio not detected Push 3.5mm plug in deeper; check driver version. Can't transmit
This is where you enter your RX/TX frequencies. Ensure your "Spacing" is set to 12.5kHz (Narrow) for modern FCC compliance in the US. icom icf4003 programming software work