[General Questions and Answers] Rburgesssophie11487:
So first off I don't normally post anything....but I tried and searched for something actually useful for my LG G5 random restart problem and found jack sh**. So anyways when I finally fig it out and fixed phone (no wake lock bs actually fixed hardware issue) I thought i post this so that someone in my shoes will stumble across this post and not throw away a nice phone that fixable pretty much free if u have necessary tools which is minimum .. So enough bsin ill get to this is kinda risky so I am not responsible if u cook ur phone ..... But if its bootlooping already its basically a paper weight neways so what is there to loose ...

first off i noticed the phone would reboot after I set it down or bumped it just right ...I tried all the battery stuff I have like 4 and phone behaved the same with all of em .. Also noticed as soon as battery got around bottom half of charge it would bootloop worse or restart more often

So first I took the phone apart removing logic board from screen leaving it plugged so I could still see display when phone was powered on

To power on phone while apart there are 3 rows of touch contacts with one more right above the three rows u take some tweezers or whatever and touch the top single contact and bottom row middle contact and hold for about 3 sec

Before I powred one i took the heat shield that has the heat sink stuck one it one the side of motherboard that faces screen when together there are 2 big processer chips one is double stacked the other one is just single one with the shield off I powered phone and took a plastic pry tool and carefully tapped on the center of chips and found when i tapped the single stacked one or would restart...so isolated the problem .....

Now u can go about trying to fix this couple ways ... The problen is bad solder connection and somehow neec to get it reconnected .. I would reccommend a hot air solder gun with a good flux to keep from making it crispy ... I didnt have hot air gun ... And i nit say do this but this what i did like i said not responsible for any type of damage to phone but i fig paper weight what I got to loose ..So what I did was I took some heat shields I had layinf around from old phones and covered everytjing up around the single chip processer whatever.. I took a pinch of solder flux and covered top of chip and all i had for heat was a cigar lighter type torch.... Yes i know ...but it worked for me no bullish**t... Anyways I took just a tiny piece of solder n set it on heat shield as close to chip as i could ... U see where i going that piece of solder will tell me when i got chip close to hot enough cause it will melt ... Genius I know ... So i set it to low and went to town for around five to 7 sec then with plactic pry tool golf tee whatever i carefully pushed gently in center straite down just a like quck push just don't do it crooked at all cause u can push chip over then u have perment paper weight ... Anyway after that i took some heat sink placed some on both chips the double and single stacked ones put that metal shield back on put together and lone behold the thing actaully booted and been working ever sine... I know this a bit crude and risky but i couldn't find nada on a fix for this issue n if u like me w nothing to loose and have tried everything else u could think of first then. U welcome to give a shot...what the he'll right

Sorry for bad spelling but I really just dont car to capplize and all that grammer crap u get the idea what I talking about hope it helps someone ....8