shutdown and not power on problem mainboard
not power .problem mainnboard , no sharj and no start and no screen never on mobile
This is for my former LG G4 509K phone, but the same procedure usually does the trick on LG phones. Way more often then not, the issue on phones like the G3 and G4 is bad solder joints. If you can open the phone and reflow it, this will get it going again for data recovery purposes ONLY. Once the board craps out, the phone is as good as dead once you get your data off. It must be condemned, replaced and erased once you get your stuff off. If you can, please brand it so someone knows it’s a data recovery job that won’t last long. I would assume a phone like that *may* be a data recovery job, but that’s because I know certain IMEI ranges are known to fail and I’d be leery of such work.
My way of doing it isn’t for the feint of heart, but it saved me from having to worry about having a backup since I salvaged the data on the actual phone I cared about. Since you only get a couple tries before the phone isn’t recoverable, grab the data you must have and leave anything you don’t need behind.
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