EM7421 Unable to find satellites

[jyijyi]

How about other port?
Do you install the correct MBPL usb driver?

Panasonic cf-20 em7305 gps problem on ubuntu

you can install the MBPL USB driver: (MBPL_DRIVERS_R35_ENG4-usb-src.tar) https://source.sierrawireless.com/resources/airprime/software/mbpl/mbpl-software-latest/#sthash.ZXRwiiKx.1i3tew3y.dpbs

Do you try with windows?