: If SmartFlash Tool shows no connection, open Device Manager on your PC. Ensure no yellow exclamation marks are next to the LG hardware entries. Reinstall the LG United Mobile Drivers and swap to a different USB port (preferably a USB 2.0 port on the back of the PC motherboard).
Ultimate Guide to Updating and Changing Firmware on the LG P970 Optimus Black firmware+change+update+on+lg+p970+optimus+black
