Open the installed LGUP tool. It should recognize the device in the connected port.
Flashing a stock ROM using LGUP requires careful preparation. One wrong command or an accidental cable disconnection can permanently damage the motherboard. Step 1: Gather Requirements lg rom up 1.1
Reinstall everything and attempt the flash immediately upon the first opening of the software. Alternatives to LGUP: SALT Open the installed LGUP tool
Understanding LGUP 1.1: The Professional Tool for LG Device Firmware LM-V600TM for T-Mobile V60). Sources: LG-Firmwares.com
You cannot flash any random firmware. You need the for your model number (e.g., LM-V600TM for T-Mobile V60). Sources: LG-Firmwares.com, LG-ROMs.com, or using LG Bridge’s offline cache.