LG just publicly admitted they found a hardware defect in LG G4 smartphones which causes the phone to go into a bootloop. Up until now it didn't appear to be a wide-spread issue, but it has been consistent for a notable number of users. Furthermore, the issue has apparently persisted for a few months and was increasing in regularity.
It turns out that the problem may be more prevalent than first realized. According to the report, the hardware issue could potentially affect all regional and carrier-branded LG G4 models. After doing some investigating, LG found that the culprit is likely a “loose contact between components.”
Here is their full statement,
LG Electronics has been made aware of a booting issue with the LG G4 smartphone that has now been identified as resulting from a loose contact between components. Customers who are experiencing booting issues with their LG G4s should contact their local carrier from where the G4 was purchased or a nearby LG Service Center (www.lg.com/common) for repair under full warranty.
Customers who purchased their G4 devices from non-carrier retailers should contact an LG Service Center with the understanding that warranty conditions will differ. LG Electronics is committed to providing the highest standards of product quality and customer service and apologizes for the inconvenience caused to some of our customers who initially received incorrect diagnoses.
LG has vowed to repair all affected devices. If you start to experience this issue, you should contact LG tech support immediately.
Here's the LG G4 dedicated section for further discussion: LG G4 Forum
Source: AndroidAuthority