yashsingh1/xdaforums huggingface dataset:
[G3 General] hergen66:
You will know one year in the future. There is no way to predict, how a new product will handle the challenges of everyday use.

But one thing is for sure: with a glass body and lots of glue instead of screws, the repairability will be much worse.
[G3 General] darkenoid:
How do I determine what kind of hardware problem I have on lg G3 D855.

The thing is my wife uses LG G3 before it used to have lte or g3 internet connection. Now now G3 connection just regular slow internet connection.

I thought maybe that was a software problem. I flashed tons of different roms,+ modems, went through hidden menu to enable lte. Nothing helped to solve the problem.

So I think it's a hardware problem. But where do I go from here? is there a way for a fix? diagnose. any help or manual would be appreciated. Thank You.

I'm only able to obtain regular very slow internet connection with letter H on it.
[G3 General] Igoritza:
update from the OP (me)

all BSOD boards that were fixed in described manner have started to slowly die .. I had 3 spare boards with BSOD fixed for my own usage, and it seems once BSOD starts appearing during the boot, there is no way to fix it again :(

I even tried to reheat with hot air gun with much higher temperatures (over 300c) and still get the BSOD during boot and no pressure on the chip is helping also.

I hate LG. Especially for the fact that they dont even CARE for G3 users as I wrote to all possible emails and contacts for a possible permanent solution and no one is replying. G3 (2014) should be more powerful device than J7 2017 which came out a month ago (801 is still better chipset than 7870 and all other specs are similar) and we cant use G3 because of this ridiculously bad build ..
[G3 General] stanko82:
How about flickering issue, did that come back, or it is a permanent solution definitely?

Thank you
[G3 General] lawong:
It will came back for sure , and this time its worse , reheating will only keep it in a shape for a short time. And after that worse flickering start again and again. Will never buy LG device next time.
[G3 General] alanloax:
Guys, I need help. I can not find the gyro sensor chip to solve the problem of the screen flicker.

The image of the first post is deleted! please help!
[G3 General] Igoritza:
[MENTION=4541883]alanloax[/MENTION] -

http://i.imgur.com/JSUh2Ws.png

see the camera ? ok, now go up a bit, and to the right a bit - there is a grid of 5x5 circuits (above the LED, there is a black chip, and above that is the 5x5 grid) , that is the place to apply heat

[MENTION=3735221]stanko82[/MENTION] -

It's a complete mess. Not a single board will work for a longer period. It seems that flicker appears due to combined failure of the 5x5 grid + CPU/RAM chip. I am now using a board that had the screen flicker and it couldnt be repaired with heating the grid anymore so I went savage on the board:

I used a good ol' butane lighter and gave it even higher heat: holding a lighter beneath the board, exactly 2 cm from the top of the flame to the CPU and 5x5 grid (heated separately) will give it a temperature of 450 celsius. I have many boards so I experimented, I literally went hellfire on the chips and got it to work again. 450 celsius is higher than hot air gun, higher than oven. 10-15 seconds is what I did, cause it's really high temperature

result is that the board is working 100% now, but given the fact that all boards cant hold it, I will give it 2-3 weeks tops ... I guess there IS NO permanent solution except for reballing/replacing the chips which also seems futile as once you repair one chip, another chip failure is around the corner. LG is shi*
[G3 General] Igoritza:
New info!

Butane lighter actually works. My board that was failing by the day, couldnt work properly for 2-3 whole days is now working for more than a week. Got several completely dead boards to boot up again, and on top of that they work with no problems (for now)

the method: give heat ONLY to CPU/RAM on one side, and Flash memory on the other side. Dont heat single chips from the first post.

I will make a quick drawing of how to do it, but be advised: you are doing it exclusively on your own responsibility, and I am not to blame for any failure:

http://i.imgur.com/EUY33GC.jpg

I know that many of you dont have so many boards to test them this way, as I do, so be advised: these are really high temperatures (Celsius units) - top of the flame is around 1400c, while 3 cm above the flame should be around 450-550c (much hotter than oven max temperature, or hot air gun) - IF you would like to test this method, try to heat it up with bigger distance (4 cm for example) amd if it doesnt help, move the flame closer. Time needed to heat the board should be 10-15 seconds tops.

Best way to know that you did a proper job is to hold the board with your fingers, the long part between upper and lower board sections - once you feel the heat on your fingers it means that there is a heat equilibrium on the chip, so it started transferring heat to further parts of the board.

Note1 - watch out for LED, it will fall off first, when flux melts. if you position the flame properly, you will not lose the LED (flame should be directly under the chip on both sides)

Note2 - I know this sounds crazy, but those are exact temperatures used in factories where they make phones. Flux melting temperature is 280-300c, solder melting temperatures (used in modern boards) are 400c.

I am down to only 1 board, from total of 15. It's now working, and 3 dead boards booted up. I dont have anymore units to test those 3 boards for constant work, but I will eventually report
[G3 General] lawong:
I can confirm that heated with high temp working, for now.

Mine was heated with cigarette lighter(the one that light up like the fire in the kitchen) , and got it working again for now. Let see how long it can last.
[G3 General] Igoritza:
watch out when using torch lighters - make a greater distance than 3-4 cm. those have even higher temperatures (top of the flame can go above 3000c for stronger models) I have a Marlboro torch lighter that can burn through wooden objects in seconds, can literally pierce through 0.5 cm thick plastic in a second. I am glad your board is working but you were lucky, or you knew what you were doing :)
[G3 General] tiguy99:
Wish I found this thread 2 years ago when I had my G3...

O.P

Thanks for sharing
[G3 General] belowap:
Hello guys! Unfortunately image in the first post removed and I bought the phone with no working WIFi and SIM card problem :( If anyone has copies of the images please post them or explain what chips need heat. Many thanks in advance!
[G3 General] Khalid47:
i still have the original images of this post here they are [IMG="first one"]https://scontent-amt2-1.xx.fbcdn.net/v/t34.0-12/20632306_1560304657355964_1674305661_n.jpg?oh=f456c5e3d90ce82ad8cd7cfb6fe5e4a5&oe=59879D82[/IMG]

[IMG="2nd"]https://scontent-amt2-1.xx.fbcdn.net/v/t34.0-12/20632638_1560304624022634_1381296731_n.jpg?oh=4e0dd21c9bc4dfe10dc80fc61718b8f6&oe=59878274[/IMG]
[G3 General] 3di:
I bought a new board (in case you are interested in story here -

https://xdaforums.com/lg-g3/general/screen-flickers-randomly-t3577242/page3

What I am curious about, my new board is from a cracked phone, but the phone was sent to LG repair short before it was cracked, and the board was renewed in jan 2017, also because of flickering and reboots.. (again it was a 32gb Version)

The new processor reaches a lot less temperature (about 15-20°C lower) even in heavy usage.

And non the least the storage chip, that covers the processor is another one, the on the defect board was made by Samsung, the new one is huami or something..

And it gets slightly better Antutu stats.

Maybe that's the reason some phones show up those problems others don't..

Maybe LG noticed those problems and decided to change something.

Can anyone confirm?

Regards 3di
[G3 General] lawong:
Well i really didnt know what am i doing hehehe , just trying my luck because the phone is just about to be thrown away , suprisingly the phone manage to survive until now, with a heavy usage , still dnt show any kind of flickering , but it wont read memorycard anymore,maybe i burn out something. :p
[G3 General] baqtr:
bluffed

i bought used LG G3 D855 model for 7000INR which originally billed for 45000INR, i was happy to get it for such low price but i know now why such low price it was sold, i tried everything to get sfix thgis flickering issue, no success, i wish someone come up with true permanent solution.

.

btw thax all others who are discussing atleast i feel i am not alone and hopes there will be some solution come up some day
[G3 General] muchepicfail:
This is shot in the dark but hoping to restore my old G3 (D851) back to life before buying new phone.

Bought used/refurbished off ebay back in 06/15. Worked fine for over a year then one day dropped it flat on its back from height of toilet seat and stopped working.

Wifi, bluetooth, everything powers on fine but can't get any cell service/data. Factory reset back to stock kitkat didn't help, tried on stock Lollipop and Marshmallow as well but didn't help.

Opened up the phone before to check for any possible signs of damage but didn't notice anything "obvious". Either my IMEI suddenly got ****listed (2 of the digits are scratched off on the sticker) coincidentally or still some hardware issue I haven't found.

What hardware component should I be checking that affects cellular service/reception/data? Thanks
[G3 General] truk14:
I just thought I'd put a little light on the screen flicker issue. I'm fighting that issue, and have done some extensive testing. In my circumstance, and I'm sure some others, it IS the CPU that is causing the issue. I can reheat the CPU using my heat gun (one for soldering) set at 350C for about 45sec and fix the issue. It seems to be caused by Fulmics 7.6 not throttling the CPU properly, and overheats. It works fine until I don't pay attention and overheat the thing again in my games. Just thought the info might help someone whom the original instructions don't.

Definitely thanks to the OP though, since this thread fixed the wifi AND sim issues I was having, and has fixed about 3 other phones as well!

EDIT: Just thought I should put in the typical do at your own risk. 350C is a LOT of heat. I was more looking to point out the fact is is the CPU causing it, not recommend a temp or time.
[G3 General] xenover:
Is BSOD when the phone doesn't go past boot screen? Because I have that problem and have been thinking about selling the faulty phone.

Here's my thread from last year.
[G3 General] xfim:
[MENTION=3769879]truk14[/MENTION] [MENTION=4667817]baqtr[/MENTION] I fixed my screen flickering/fading just by putting pressure on the ram chip (it's the ram, not the cpu that causes this issue, and that because LG didnt put any thermal solution on the spot obviously designed for a thermal pad). Get a piece of something thermally conductive and about 1mm in thickness that you can put inside the phone so that it causes the ram chip to make contact with broken bga again.

Notice how the ram is bent around the edges (attachment). I also put thermal paste below the metal piece so that it transfers heat to the metal frame of the phone. Note: when using bigger than ram opening metal pieces, emi shield removal might be needed.

[MENTION=4108167]xenover[/MENTION] you might need to do the same thing but also put pressure on the ssd as that is what causes BSOD (i think)
[G3 General] 3di:
This solution only works for a few weeks, it's known as a non permanent solution..

So don't be sad if those problems will come back :)

Best regards 3di

---------- Post added at 09:52 PM ---------- Previous post was at 09:40 PM ----------

Hi,

Interesting aspect - I never tried to throttle down the cpu to prevent overheating after the heat gun therapy..

But I'm not shure if this helps, the 801 isn't the fastest nowadays, if you do so it'll be slow as a turtle.

Unfortunately my first time flickering was on my G3 that went on stock and never was away from it (I have 2), so maybe that destroyes this theory..

I went a little further, my after I declared my G3 dead, I gave it a 400 °C SMD heat gun shot for 2 minutes, but also this didn't work as a permanent solution (just for 2 weeks).

Just to be shure:

I don't recommend anyone to treat your phone with 400° C

Everything you do is on your own risk.

Best regards

3di
[G3 General] xfim:
[MENTION=534632]3di[/MENTION] it works great so far on my phone. It depends how you manage to do it. With my first attempts it would last a few days before appearing again but now it works great even under high load for extended peiods of time. No amount of heating with a heatgun will be better than doing it this way, and if you only heat it up and not put any pressure on the chip, it will stop working again. You should definitely take some more time and mod it properly and you wont have any more problems with it.
[G3 General] 3di:
I had a 1mm thermal pad under RAM and on the opposite side after reheating, it didn't last Very long..

For how many days fit it last on your device?

Best regards

3di
[G3 General] lawong:
yah its totally true sir , but im on fulmics 7.5 when the issue starting to appears , just as soon after im done clean update(wipe everything from previous version) the rom when its starting to flickering.
[G3 General] xfim:
I had 1mm pad too and it only lasted a few days. Now it's going strong for weeks. Well, I just had the problem occur again twice last night but in the morning I tightened the screw and now it works well again. If it happens again I will use thermal paste instead of 0.5mm pad but Im hesitant to do it as it could make a mess lol. The key thing is that metal piece I put inside. If you put a smaller one (emi shield opening sized) you will have a blue-ish spot on the screen because of the pressure. Bigger piece solved that issue for me.
[G3 General] 3di:
Hi [MENTION=4974544]xfim[/MENTION],

I think it'll come back, but I’ll press thumbs it doesn’t!!

In my opinion It's caused is a broken solder, if you apply pressure you reconnect it via contact, but not via a new soldiering connection so it’s not a proper solution. Open solder surfaces tend to stain - so the problem will be back maybe sometime.

Unfortunately it isn’t a permanent solution too, treating with a heat gut does reflow the solder but there is not much, if even flux fluid left from the original solder, so the contact between the 2 Solder surfaces will eventually do not get in proper touch..

The only permanent solution I saw, there is a YouTube video about, was to detach RAM and CPU, apply new solder, flux and resolder it's connections.

I may be good at soldering and something but this is a number too high for me (you'll even need a microscope..).

Here is the video (in case you are interested)

https://www.youtube.com/watch?v=3HJtM7Pmw20

If you know anyone who is capable to do this – I would be interested too!

As always, Everything you do is on your own risk.

Best Regards

3di
[G3 General] xfim:
[MENTION=534632]3di[/MENTION] Well, yes it may not be a permanent solution as these connections are broken but only time will tell. So far, so good. In case pressure wont be enough in future months (or years) I might heat it up with a candle (the same way I fixed a non working laptop motherboard (hot amd cpu+ hot ati gpu on one heatpipe, go figure..) while applying pressure and hope for the best haha. Anyway, my current solution works well enough.
[G3 General] hedgecore44:
I am very interested in troubleshooting my SD card issue. Do you know which chip affects the connectivity of the SD Card? (same chip as SIM maybe?) My SD card works intermittently and I know it is hardware as I have tried various ROMs and SD cards.. I have not ever had any SIM issues... I have no problem putting a butane flame up to my phone if it means I could get my SD card back... Thanks!
[G3 General] 3di:
I also had this issue - solved it with 350°C SMD heat gun for 1,5 Minutes and pressure on the frame of the SD card. This is permanent gone since that.

I think bare flame is to undefined in temperature, you might risk other components to fall of and you habe to work upside down, so gravity will work against you..

As always everything you do is on your own risk.

Best regards

3di
[G3 General] 3di:
Hi all and Hi [MENTION=993401]Igoritza[/MENTION],

I experienced another strange behaviour.

I got a Board from a fried, it works just fine, but the display shows a dark area when it's light is dimed to the lower levels.

If I change the board into another phone, it’s the same, so it isn’t a display problem.

I tried SMD heat gun 300°C for 2 minutes shots on RAM/CPU, and also on the four mosfets below the display connector and the display connector itself, but it didn’t help.

I’ll add a Picture showing the problem, unfortunately this isn’t easy to shot due it only appears when display is very dim and another one showing the affected area.

Best regards – and thanks in advance.

3di

As always everything you do is on your own risk.
[G3 General] KevMetal:
All I know is I bought a g3 with wifi turning on problem ...used the paper trick to apply pressure and it worked ...wifi turned on ...then i got reboots ...then i got bsod ...knowing nothing i baked the board for 10 minutes at 180 degrees celsius ...

I am now typing on a lg d855 with no wifi disconnects , no wifi turning on , no reboots , no screen flickers , no bsod

ALL OF WHICH IT HAD BEFORE THE BAKE ... maybe i got lucky or maybe a whole bunch of people got success with

10 minutes [MENTION=742690]180[/MENTION] degrees CELSIUS on a bed of foil in a pyrex dish in a PREHEATED oven .
[G3 General] thorhammer67:
Images link

Hello Igoritza, nice post, i just cannot open the images link, can you re-post them? I'm trying to fix the screen flickering.

Thanx a lot!

Hello Igoritza, nice post, i just cannot open the images link, can you re-post them?
[G3 General] sudamit:
[MENTION=993401]Igoritza[/MENTION] can you confirm whether the Sim card related issues have permanently resolved using the technique you described. Could you please share the image related to it because all the links seem to be broken.

Thanks in advance
[G3 General] baqtr:
good news for every1 those having frrquent hangup of touchscteen / unresponsive touchscreen of lg g3 d855 model.

i had this model till today and my badluck that the moment i found solution, just 1hour of smooth and best experience ever since phone buying, i lost my phone.

though i am sad i lost premium mobile which was useless bcoz of frequent hangup but when i solved it, it got lost. how unfortunate.

but i came here to tell u what i did, u guys try and reply does it work or not .

Solution: disassemble g3 device and on motherboard below black square chip i.e between motherboard and base keep useless micro size sim card and carefully assemble back. thats it boot the device and check. it should work, because my understanding is that black square chip below motherboard is like in suspension, the moment loose connection occurs it hang touchscreen i.e unresponsive touchscreen. so keeping this micro sim card will fill the gap giving perfect continous connection. and what i observed that last 1hour of heavy usage by me that, phone didn't heat much like before, thats bcoz i think as loose connection always creates heat just similar the conducting wire if there is loose connection and circuit is incomplete or better say partial complete it generate heat because the conducting electrons doesn't get medium to flow so all electron tried to flow through the partial completed connection giving rise to temperature. so if the circuit is fully connected i.e in our case that black square chip to motherboard that will surely make complete connection solving almost all problems.

please try and reply, though i lost my phone yesterday night am not getting sleep so thought better do some good work by sharing u guys.
[G3 General] ceza1380:
My phone started doing famous LG bootloop problem. 1 year ago I had same bootloop problem which is happened because of battery and I bought a original battery from LG store and my problem fixed but now my reboot and bootloop problem started again, I thought it's because of battery so called LG store and asked about LG battery but they said they don't have any also not sell anymore so I ordered one from online shopping store which says it's original, it came and doesn't look like original but as they claime it has same voltage as original battery, it's a trusted seller and people commented that battery solved their reboot bootloop issue, but it didn't solve my bootloop issue. My phone suddenly hangs reboot and bootloop, it stays at LG logo and reboots itself like 5-6 times and boots after that normally. I use 2 maybe 3 hours or more and it reboots and bootloop again. I use the phone because I don't have any other phone but I guess it's a hardware issue not the battery and like every other people say it's gonna be useless brick soon and dead completely :( Does anybody have suggestions? Can it be still battery issue and do you guys suggest me to buy another battery after I bought one already? Thanks. Have a great day.
[G3 General] KevMetal:
#I DON'T TAKE ANY RESPONSIBILITY FOR ANY DAMAGE TO YOUR DEVICE#

-open the back

-remove battery , sim and sdcard

-remove the screws

-unclip the four connective yellow bands which connect your motherboard to the screen and camera

-take out the board

- preheat your oven to 180 degrees celsius

-put the board on a bed of foil in a perspex glass dish

-bake EXACTLY in the middle of the oven FOR 10 MINUTES EXACTLY

-let it cool for at least 30 minutes

-put everything back the way it was

THIS WORKED FOR ME . THE HEAT SOFTENS THE SOLDERS OR WORN CONNECTIVE MATERIAL RECONNECTING THE LOOSE WIFI CHIPS AND OTHER ..

MY PHONE IS RUNNING LIKE THE FIRST DAY ! DON'T COOK IT TOO LONG ...THIS IS NOT A JOKE OR A TRICK ..IT IS BASED ON SOLID professional techniques for fixing motherboards called reflowing ..if you don't have professional equipment or money this is something that works..
[G3 General] ceza1380:
Thanks for the reply and help. I'll try this if my phone completely dead and not turning on anymore. My hand skills are awful. I'm afraid that I will not get phone's parts together.

Anyway have a good day thanks again.
[G3 General] Lookin4Trouble:
[MENTION=993401]Igoritza[/MENTION] - Hopefully you'll have some advice for me, as I have not one but TWO LGG3's that I'm ready to circular-file here...

#1 - My old phone - Powers on as long as it's connected to a charger, recognizes Micro USB charging cable on bootup no problem. Thinks it has no battery, ever, with any battery - I have 3 or 4 OEM batteries, a couple aftermarket, and a triple battery that I used for a year and some change. Will not stay on long enough to run backup / pull pictures and whatnot off. Frustrating^googleplex.

#2 - Wife's old phone - Micro-USB Connectivity is crap. Will charge for 2-3 seconds, then no charging. Wiggle the cable, kinda okayish, then no charging. Force the cable to seat at an angle and it may charge for 2 seconds, may charge fully. Trying to use a USB cable to pull old pictures and music and whatnot off the device is ridiculously frustrating. No bueno, disconnects constantly. Asks every 1-2 seconds if I want to allow USB debugging to browse files, then immediate disconnect whether I hit the allow button or not. Insert rageface here. Managed to wedge an older microusb connector in for long enough to pull files this morning, but damn was it painful.

Any ideas how to fix one or the other? I went through a couple hours of frustration getting all the stuff off the wife's old phone, so that one is more about maybe being able to sell it once the charge/data port is fixed, but I can't even get my old phone to stay on long enough to pull anything off...

I haven't tried refluxing but since the issues I'm having aren't spoken to here, thought I'd ask before putting them in the oven...

Thanks

L4T
[G3 General] Anas Ahmed Anis:
contact info....

Can you please give me contact info of that indian guy.........?
[G3 General] Anas Ahmed Anis:
Can you please tell me where is the gyro sensor chip of lg g3

Mine is d851

Help me......