Chosen Solution
My LG G4 US991 keeps failing to successfully boot. It has booted some times, but now it won’t at all. I tried recovering it via the LG Mobile Support Tool with Upgrade Recovery, but it said the phone wasn’t connected. What do I do now?
I see you mentioned the unit cannot turn on anymore. Are you able to get the unit in download mode? Courtesy of this site. LG G4 Download Mode Download and Install LG’s USB DriversPlug the USB Cable into the PC(not connected to the LG G4)Have you PC Powered On and Logged inPower Down the LG G4Press and Hold the Volume Up Button on the LG G4While Holding Volume Up, Plug the USB Cable into the LG G4Continue Holding the Volume Up Button After You See ‘Download Mode’Let Go of the Volume Up Button When You See the ‘Firmware Update’ Screen on the LG G4 The connection would either be the phone not turning on or the driver. Hope this helps.