Why does my LG G3 screen flicker and fades to darkness?

[Trism11]

Quick update if anyone interested. Worked perfectly for about two weeks until I did the same thing and I overheated it again (to the point it shut itself off), i obviously don't learn from my mistakes...

Redid it at 200C for 9 minutes and all is well again, should really look into adding some thermal paste ect and maybe go back to the stock rom?

 

[Jartzy]

I just baked mine last night. 385 for 6 minutes. I was hesitant to do it as I thought I would break something but it's suprisingly easy to do. I disconnected the camera before baking it but not sure if that is necessary or not.

In regards to heading CleanMaster detects overhearing of the CPU and helps cool down the phone closing apps and so forth. I know there are better solutions out there but this is a decent simple solution which may provide a small benefit.

 

[Maiara Candido]

I've tried every solution proposed in this thread, paper trick, baking, etc. But it did not last for more than 3 weeks... so I gave up e bought a new motherboard. I might receive it in the next few days.

But I keep wondering, will my new motherboard do the same thing??? Is it a problem that occurs to every LG g3 or we just were unlucky enough to get a bad set ou something like that?

 

[the Core]

@Maiara Candido it may do the same thing. Of course not all LG G3 devices do have this issue. Though a lot do have it. Anyway, if this explanation is true, you may want to keep it out of direct sunlight and not try to heat your phone up at all:

This probably all goes back to the overheating issue the phone has in general, which leads the gpu to heat up and cool down constantly causing cracks in the soldering is my guess.

 

[juicekoo]

I threw my phone after having this problem, even a replacement for LCD won't fix the issue. My friends, who has an LG G4, also experience this blackscreen issue. I hope LG has fixed this issue before releasing other G-series.

 

[Raj Kumar17]

Why u guys dont believing me, just give it a try....i have same cell phone without any paper or even oven tricks...same cpu/gpu/motherboard and its working fine. Anyway its on u guys, but my phone is back again

 

[bishopx26]

Why u guys dont believing me, just give it a try....i have same cell phone without any paper or even oven tricks...same cpu/gpu/motherboard and its working fine. Anyway its on u guys, but my phone is back again??????????????????

can u make a tutorial with video ?

 

[bishopx26]

guys i want to flash my lg g3 international (made in korea) version d855 16 gb ram but i dont know which firmware i should choose... european firmware , hong kong or any other firwamre cus im not very good in flashing.. i repeat its international d855 pls if anybody can help me tell me

 

[RvD_1]

This problem definetly is not a display problem. The problem is caused by a bad contact on the main cpu.

This mainly happens is the (warm/hot) phone is dropped. This causes the bad connection on the board.

The solution is to reflow your mainboard, the best way to do so is to follow a reflow curve which involves pre-heating it at 150 oC and then heating it up to around 210oC.

There are several good youtube videos on the reflow subject online. For dutch speaking people have a look here: LG G3 scherm wordt zwart en flikkert – RvD blog

If you don't speak Dutch you can have a look as well because there are some English videos on that page.

I have reflowed the board 3 times in total before i had succes. First time with the main cpu to the top. After that it was totally dead and i thought that this was it. I then reflowed it again with the cardreader side up and again no succes. Both times i reflowed it for 7 minutes on 200oC.
The third time i followed a reflow curve with the cpu to the top again. Also pre-heating to 150oC and held it here for 3 minutes. I then heated it up to 200-210oC and kept it again 3 minutes on that temperature. After that turned the oven off and let it slowly cool down by opening the oven door a little.

This solved the problem and it is working ever since without any problems. I used a normal oven but i am now considering to make a more accurated reflow oven for the future.

 

[bishopx26]

This problem definetly is not a display problem. The problem is caused by a bad contact on the main cpu.

This mainly happens is the (warm/hot) phone is dropped. This causes the bad connection on the board.

The solution is to reflow your mainboard, the best way to do so is to follow a reflow curve which involves pre-heating it at 150 oC and then heating it up to around 210oC.

There are several good youtube videos on the reflow subject online. For dutch speaking people have a look here: LG G3 scherm wordt zwart en flikkert – RvD blog

If you don't speak Dutch you can have a look as well because there are some English videos on that page.

I have reflowed the board 3 times in total before i had succes. First time with the main cpu to the top. After that it was totally dead and i thought that this was it. I then reflowed it again with the cardreader side up and again no succes. Both times i reflowed it for 7 minutes on 200oC.
The third time i followed a reflow curve with the cpu to the top again. Also pre-heating to 150oC and held it here for 3 minutes. I then heated it up to 200-210oC and kept it again 3 minutes on that temperature. After that turned the oven off and let it slowly cool down by opening the oven door a little.

This solved the problem and it is working ever since without any problems. I used a normal oven but i am now considering to make a more accurated reflow oven for the future.

i was baking it to 200 C for 10 minutes and now it wont turn on anymore.. u think the board its dead ?

 

[RvD_1]

If you didn't went over the 220 degC there is a fair change that it isn't broken. It could be that you have desoldered one or more connections. There is a fair change you can resolder this again. It took me three tries to get it working and following a reflow curve worked for me.

Google for "Kester Reflow Profile" and try to match these times and temperatures. Don't forget to let it cool down before you move it.
Watch this video https://www.youtube.com/watch?v=l1azZWWkmSg for some tips.

Maybe one other thing. I didn't use the hot air option of the oven because i was afraid to blow away some smd components on the board. This is the same reason why i didn't used a hot air gun.
I had used a hot air gun to repair a sim card reader on the LG G3 and afterwards i found out that i had lost some smd resistors in the process.

 

[bishopx26]

If you didn't went over the 220 degC there is a fair change that it isn't broken. It could be that you have desoldered one or more connections. There is a fair change you can resolder this again. It took me three tries to get it working and following a reflow curve worked for me.

Google for "Kester Reflow Profile" and try to match these times and temperatures. Don't forget to let it cool down before you move it.
Watch this video https://www.youtube.com/watch?v=l1azZWWkmSg for some tips.

so basically u saying i should bake it again in the oven to 200 C bro ? i watched the video but i dont get.. i should bake it again ? ive baked before but this time isnt turning on anymore.. weird

 

[RvD_1]

By heating it the solder gets soft again and reflows again to make the electric connections again. It can happen that this doesn't work directly the first time.

Just make sure you observe the temp. in the oven and try to follow the reflow curve. So heat it 1-2 minutes at 170 degC and then heat it 1-1,5 minutes at 220degC and then let it cooldown. Heat it up with the cpu to the top and the sim card down.

Keep the board level and put the board on some alu foil as seen in the video.

 

[bishopx26]

By heating it the solder gets soft again and reflows again to make the electric connections again. It can happen that this doesn't work directly the first time.

Just make sure you observe the temp. in the oven and try to follow the reflow curve. So heat it 1-2 minutes at 170 degC and then heat it 1-1,5 minutes at 220degC and then let it cooldown. Heat it up with the cpu to the top and the sim card down.

Keep the board level and put the board on some alu foil as seen in the video.

do i have to let it cool down after the first heat ?

 

[FLJO1340]

Just a quick follow up... I started having issues mid January, the paper trick worked for about 5-5.5 months for me, replacing every couple weeks. I finally reached a point where it wouldn't work at all (about 5 days ago). I also started receiving the 'blue screen / boot loop' (theres another thread for that issue). Just for the hell of it, I threw the phone in the freezer for a little while and when I pulled it out, I was able to get onto my phone. All be it this only lasts for a few minutes, but it allowed me to get on and save all my contacts to my sim card. I've done this 3 or 4 times since and it keeps working for a few minutes. It's not much, but if someone is desperate to get on their phone to get something off of it, it's worth a shot.

Also, I'm curious, is this issue across all networks? I've got Verizon and just wondering if it's the same for everyone else (Maybe Verizon carries different models? I don't know). On that note, I didn't realize it, but Verizon has a free cloud service, which I never signed up for, but it had all my photos and videos that I had ever taken on the phone backed up, and accessible on the Verizon website. Once again, just in case anyone is looking for it.

 

[bishopx26]

By heating it the solder gets soft again and reflows again to make the electric connections again. It can happen that this doesn't work directly the first time.

Just make sure you observe the temp. in the oven and try to follow the reflow curve. So heat it 1-2 minutes at 170 degC and then heat it 1-1,5 minutes at 220degC and then let it cooldown. Heat it up with the cpu to the top and the sim card down.

Keep the board level and put the board on some alu foil as seen in the video.

bro listen without bothering u.. i baked it again and now its back to life lol but it stays
for a while on and then keeps restarting... what might be the problem u think ?

 

[RvD_1]

I have had the same thing. It was restarting and i also had some graphics distortion. I just backed it again following the reflow curve. Just follow the curve and respect the times and temperatures. Don't raise temperatures above the max. temp. of the curve and don't extend the time. If you respect the times and temperatures it is fairly save to heat it again. keep it level while heating it and sometimes turning it around with the other side up works as well.

So in short, just reflow again following the curve.

 

[bishopx26]

I have had the same thing. It was restarting and i also had some graphics distortion. I just backed it again following the reflow curve. Just follow the curve and respect the times and temperatures. Don't raise temperatures above the max. temp. of the curve and don't extend the time. If you respect the times and temperatures it is fairly save to heat it again. keep it level while heating it and sometimes turning it around with the other side up works as well.

So in short, just reflow again following the curve.

now it shows blue screen.. once again bro 1-2 minutes at 170 degC and then heat it 2 minutes at 220degC right ?

 

[RvD_1]

If i look at your post, then it is 13 minutes after mine. You are to fast. Pre-heat the oven to 150-170 degC and give it the time to heat evenly before you start. After reaching max. temp. you should give it the time to slowly cool down before you move it. Whole process would than take more like 30 minutes instead of 10 minutes. Good Luck.

 

[bishopx26]

If i look at your post, then it is 13 minutes after mine. You are to fast. Pre-heat the oven to 150-170 degC and give it the time to heat evenly before you start. After reaching max. temp. you should give it the time to slowly cool down before you move it. Whole process would than take more like 30 minutes instead of 10 minutes. Good Luck.

i wasnt heating the moment i was writting... so 180 C for 2 minutes ? im confused how long i should heat it.. the fella in the video says for 10 minutes