If you are using the and the hard lock key , ensure you download the driver set specifically labeled for the "hard lock key".
This step resolves 70% of persistent Fn Lock failures. lgmv lock key driver upd
Some older LGMV models use Fn+Tab or Fn+Insert instead of Fn+Esc . Check your user manual. If no combination exists, you cannot toggle Fn Lock—only remap keys via software. If you are using the and the hard
: Connect the LGMV communication cable to the outdoor unit's PCB and the other end to the PC's USB port. Key Authentication : Insert the USB lock key into a separate USB port on the PC. Software Execution Check your user manual
Ensure you downloaded the version matching your specific LGMV hardware module version (e.g., LGMV 7 vs. LGMV 8).
To use the full version of LGMV on a PC, you must have the physical hard lock key inserted into a USB port.