: If your phone is stuck on the LG logo and won't turn off, hold Volume Down + Power until the screen goes black, then immediately switch to holding Volume Up while the USB cable is connected.
Entering (also known as Firmware Update mode) on the LG V40 ThinQ is a critical step for advanced maintenance, such as manual firmware flashing, unbricking, or system downgrades. Follow these steps to access it: How to Open Download Mode on LG V40 ThinQ