Talk:LG smartphone bootloop issues

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A reasonable explanation, but not "Wikipedia-reliable" edit

Latest comment: 3 years ago1 comment1 person in discussion

This would belong in the article if the source were more formally "reliable": https://forums.androidcentral.com/lg-g4/688173-what-loose-components-motherboard-cause-bootloop-lg-warranty-repair-procedure.html :

cold spring
Yes those two videos show exactly what is the cause of boot loop issue with LG G4. LG G4 has ram layered above the SD 808 SOC. So when SD 808 generate lot of heat and expand, solder bond to ram above will likely crack. Somehow, the low temp solder LG used in it's BGA chips is prone to this failure. Obviously it's not the ram chip itself or SD808 chip, as they have proven to be reliable on other brand phones. So the solution seems to be to remove the chip and replace solder with normal leaded type solder. So first video shows exactly this - a very skilled person taking off the ram and carefully cleaning, refluxing the connections with normal solder and re-attaching the ram above the SOC by HAND!! That is pretty damn incredible job. Second video is similar, but the person didn't bother to take off the ram, and just applied some flux and heated the ram chip which hopefully will resolve the issue. But probably second approach is only a temp fix, since defective solder is still in place. Sooner or later, it will fail again and go into another bootloop. I guess the videos are encouraging in that it doesn't take a million dollars of hi-tech equipment to fix the LG G4 bootloop issue, just extremely skillful and steady hand for resoldering job to replace the defective solder on the ram chip.
12-08-2016 11:01 PM

(Read the thread - there's more, and disagreement.}

My personal experience with another LG model is that LG's phone design is good, but they can't solder - multiple problems with soldered connections going bad. Pol098 (talk) 16:06, 12 March 2021 (UTC)Reply

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