Exact same thing happened to me. The phones recovery wouldn't work.
U power the phone off..wait 4-5 seconds after it goes off and then you hold the volume down button and power button....as soon as lg screen comes on you let go of the power button ONLY for a sec and push it again while still holding the volume down the entire time..keep it there until the factory page comes on.. It took me a cpl tries.. I'm not sure if I held the volume button down and power at the same time in the first step or hit volume for a a second before the power so u can try both