Hi, I have a LG K20 Plus. I currently can't turn the phone on, so I don't have much software information to give you. The phone was bought at T-Mobile (Metro by T-Mobile) and I had a SafeLink sim card and a 16 gb micro sd card inserted when the issue started. I have since removed both. It says Qualcomm snapdragon on the screen when it starts. It was also rooted and the bootloader is unlocked.
I broke the screen on my phone and I decided to do the repair myself. I have done about 7 or 8 screen replacements and I actually did this phone a year ago with no issues, so I felt I could manage this one as well. I bought an entire display (from ebay) and switched it out with no problems. Initially it worked great! I used it for a few days before realizing that I had no sound. I opened it back up and noticed the loud speaker had fallen out. I found it, put it back in, reassembled it as I normally do and turned it on.
NOTE: when I was reassembling it the second time, I actually tried to put a screw in a hole that wasn't a screw hole. I used a light to normal amount of pressure but I didn't force it. I think it's the hole where the moisture detector is. Picture #1
I turned it on and right after the logo screen I got a message that said "High temperature detected Powering off for your safety" and it immediately shut off. The phone does appear to charge normally but it won't stay on. I did a factory reset (I'm not sure if it's still rooted but the bootloader is still unlocked). I also switched back to the old (broken) display just to check if that would work. I couldn't see any difference in the shielding but I switched them just to be sure. I bought a new battery and installed it. I took a q-tip and 95% Isopropyl Alcohol and cleaned pretty much the entire motherboard, paying special attention to the battery connections. After each one of these things, I tried to start it with the same error message immediately upon start up.
NOTE: At no point has the phone every physically felt hot or even warm. I don't think it's on long enough for it to get hot. But something is wrong and I have no idea what it is. I, literally, took the phone apart, put in the speaker and put it back together in less than 5 minutes. Could it be I just bumped something and knocked it loose?
I searched for any information I could find both here and with google but there is next to no information on the LG K20 Plus. I did find some information on the LG V20 that had overheating issues, and that has been all the luck I've had. I watched several videos and it seems the solution is to apply thermal paste. But my phone doesn't have any evidence that thermal paste was ever on it. I went and bought some but I have no idea where exactly to put it or even if it's needed. Most videos showed people using some kind of aluminum foil but I'm not sure if that is safe. I have several old phone laying around and I managed to get some of the silver tape and a copper square thing but, again, my phone did not have these things to begin with. I don't want to start adding things only to make it worse.
There is a slight difference of the tape that is on my phone now (the display I just bought) as compared to the old one (broken display). Picture #2 Again, I have no idea if that means anything but I thought it worth mentioning. Picture #3 is how it looks now as if I were going to put it back together. Picture #4 is the part (don't know name) where the videos show to apply the thermal paste and the shielding.
I'm really at a loss as to what to do next and I can't really afford to take it in to have it repaired before next month. If anybody has any insight or answers as to what happened, I'd be very grateful for your help. I'm sorry for the long post. I just wanted to tell you everything I have done in detail. Thank you
If you're using Kernel Auditor or any other kernel adjustment simply reset to default and use only ondemand or interactive. There's also options for the thermal portion of the kernel, don't mess with those. If VCC or another thermal option was checked off turn it back on. Putting the GPS to the moderate setting (the one below high accuracy) will keep the temps down as well. Are you using a custom ROM? If you're on Discord you can feel free to message me SCOPE★ BRΞΛD #8460 . I am only offering that so we can get this resolved quickly for you, just copy and paste since I use special characters.
Omgosh, thank you so much for taking the time to respond! Although I'm sure everything you are saying is very smart, I have absolutely no idea what you're saying. I'll do my best to try and answer you. I don't know what SCOPE is or how to send a message there. I don't think I'm using any thing for the "kernal". Also, I don't know what VCC or Discord is. As far as turning off setting for GPS or any other app, the phone will not stay on. I get about 1 sec after the logo when it boots up, then the error message about overheating and it immediately shuts off. I did a factory reset so everything should be good to go as far as apps. I don't think I'm using a custom ROM. The only thing I did was install TWRP, unlocked the bootloader and rooted the phone a year ago but nothing since then. As I stated earlier, this happened right after I did a display repair. Is there something on the MOBO that can get bumped that will make your phone get hot or send a overheating error. My phone doesn't show any sign that there was ever thermal paste on it prior but should I add some now. Will that help?
Update... Now the phone does not power on at all. When I plug it in to charge it I get an error that says "Device temperature is too high or low. Please move to another place to charge. I wonder where you went. I googled SCOPE so I could sign up to message you like you asked me to but nothing but definitions came up. I know I'm out of my league here. You guys all talk so technical. I didn't understand one thing the person asked me for. I know it's rare to get a response as quickly as I did and I was so happy to see someone had responded. Now, I just feel stupid and defeated. I thought this site was inexperienced with cell phones friendly. I'm just trying to get help so I don't have to go out and buy another phone again. Can someone refer me to a site that is more directed toward people who don't know much about the technical side of cell phones... please! Again, thank you for your time.
HelpNeededPlz said:
Update... Now the phone does not power on at all. When I plug it in to charge it I get an error that says "Device temperature is too high or low. Please move to another place to charge. I wonder where you went. I googled SCOPE so I could sign up to message you like you asked me to but nothing but definitions came up. I know I'm out of my league here. You guys all talk so technical. I didn't understand one thing the person asked me for. I know it's rare to get a response as quickly as I did and I was so happy to see someone had responded. Now, I just feel stupid and defeated. I thought this site was inexperienced with cell phones friendly. I'm just trying to get help so I don't have to go out and buy another phone again. Can someone refer me to a site that is more directed toward people who don't know much about the technical side of cell phones... please! Again, thank you for your time.
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Hey, I just wanted to say sorry this happened to you. The same thing happened to me. My LG K20 Plus, no matter what button combinations I push and for how long I hold them, will not turn on or go into download mode. Plugging it in to a charger or PC does nothing either. Before it got to this state, I got the infamous green screen of death/Demigod crash handler (google this--it's a known issue with some models of LG phones and it happens when they overheat). It's definitely a hardware/build issue, and especially since this issue keeps the phone from turning on or connecting to a computer, I don't see a workable fix short of buying a new phone, unfortunately. Again, I'm in the same boat so I'm not happy about it either. I would say XDA is by far the best site to find a fix to this sort of problem, so if no one here has any suggestions on how to fix it, I think you (we) may be out of luck.
Thank you for letting me know. I'm not sure of some of what you said but I did catch the bottom line. Basically, just hold onto the phone until someone here comes up with a fix or workaround? I have a question for you. Did your problem start after you did some kind of repair? I'm wondering if I bumped something on the mobo to make it give a false overheating error. Do you happen to know where that sensor might be located? Sorry you are having problems to. It really stinks when your phone breaks and no matter how much time and energy you put it to figuring out the problem to fix it, there just isn't any good answers out there. I wish you lots of luck and if you figure anything out, please update here so I can try it too.
You need a whole new phone.
That or you're gonna have to replace the hardware
Related
Hey there. I have my Galaxy S II (GT-I9100) for about a month, and since a couple of days ago it has been behaving very weirdly about USB and charging.
First of all, the phone thinks it has USB connected at all times. When I go to the settings menu try to enable mass storage it says USB is already connected, even though it isn't!!!
Sometimes when I start the phone it goes to that USB Kies screen and says "connected", when absolutaly no cables are connected AT ALL!!!
When I turn the cell off, remove the battery and plug it back in, without turning the phone on, the recharging battery icon appears, but blinks with a drained battery icon with a yellow exclamation sign and a thermometer which I sincerely have no idea what that means.
It also takes ages to recognize the power charger or when I really connect the USB cable. And finally, when I take them off, it also takes a while to "perceive" they're off and remove the charging lightning from the battery icons.
PRETTY PLEASE, SOMEONE HELP ME OUT, as I don't have time to take the phone to service, and didn't really want to do that
Thanks!!!
This has also happened to me and loads of other SGS2 users! Although usually it only happens sporadically and not constantly. It seems that it's a bad soldering job or dust/dirt has gathered in the microUSB port. You might be able to fix it, if you're *really* careful.
Quote from another thread;
JaX3RiR said:
Last night my phone wouldn't even start charging, so I decided to take matters into my own hands. With the smallest screwdriver I could find, I carefully 'lifted' the tiny PCB in the USB jack while blowing in at the same time. Sure enough, some sand particles fell out, and I haven't gotten carmode'd in nearly 13 hours now. Previously it would do it once every 15 minutes. So far so good, it seems.
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Thanks for the help... but what is PCB? Is it the connector inside the "hole"?
Tried that and it stopped thinking USB was connected the whole time... on the other hand, it doesn't detect when I connect the USB cable
Lets try keeping 1 thread
Therere are other threads about it.
Read here:
http://forum.xda-developers.com/showthread.php?t=1132588&page=2
StupidIdea said:
Therere are other threads about it.
Read here:
http://forum.xda-developers.com/showthread.php?t=1132588&page=2
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You can't talk on plural when you only point out one thread. And I've read that, but it isn't the same as my phone doesn't go in "car mode".
My phone's problem only resembled a problem JaX3RiR briefly mentioned in the middle of the thread.
I tried googling it before posting anything anywhere, but couldn't find anything useful.
Please don't try to look like a smartass like that and embarrass yourself. If you got nothing to add to the thread, it's best if you sit out of it. It's much more appreciated when helpful people like JaX3RiR post...
Hi,had the same problem,tried reflashing back to original firmware,but still had the same problem,,the only way i could boot the phone was through recovery mode,(reboot)Had to send phone back for possible repair??cut a long story short they sent me a new phone,,They said they couldnt repair the fault,something to do with the usb charging system,,So i would advise anyone with this specific problem,to send phone back,and get a replacement..hope you get it solved
Thanks mate, I sent mine today as well... I hope they act the same with me, as I'm afraid customer service around here always tries to incriminate the user not to use the warranty...
ghnogueira said:
You can't talk on plural when you only point out one thread. And I've read that, but it isn't the same as my phone doesn't go in "car mode".
My phone's problem only resembled a problem JaX3RiR briefly mentioned in the middle of the thread.
I tried googling it before posting anything anywhere, but couldn't find anything useful.
Please don't try to look like a smartass like that and embarrass yourself. If you got nothing to add to the thread, it's best if you sit out of it. It's much more appreciated when helpful people like JaX3RiR post...
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There is no reason to be angry, I'm just trying to help, and just wanted that we all post in one thread, so it would be easier to track later.
I just posted longest thread. Here is another one if it helps to justify:
http://forum.xda-developers.com/showthread.php?t=1151863
I'm pretty sure you have the same problem. Sometimes Vlingo starts, sometimes phone thinks its charging, when trying to boot it shows battery image and won't boot, can boot only recovery and do restart from there.
Get of the high horse when people are trying to help you.
Are you sure you didn't connect USB cable upside down or bended USB port with the cable?
I have no idea what Vlingo is, and obviously I didn't connect the USB cable upside down. I don't think I bended the port with the cable since it still recognizes the cable for charging or booting and going directly into Kies mode, for example.
I am not on any high horse when people try to help me, as you could see my response towards the guys above. Your post wasn't sounding helpful at all, you were just sounding like "hey, you dumass noobie, don't open a new thread for yourself, check the forums first".
By the way, I also took a look at that thread you posted before posting mine, but I have no idea what is "car mode" on my phone...
Sorry if I sounded rough. I thought it is similar issue, so I posted link to longer thread. I had this issue myself.
Peace. Let us know what the service say .
This happened to me one week ago while on holiday....that temp indicator while charging plus the other stuff you mention....
Plus the phone went into flight mode and won't come out....
Got home and did a reset and phone now doesn't recognise sim card...
great phone but I'm a little disappointed
stevee1953 said:
Hi,had the same problem,tried reflashing back to original firmware,but still had the same problem,,the only way i could boot the phone was through recovery mode,(reboot)Had to send phone back for possible repair??cut a long story short they sent me a new phone,,They said they couldnt repair the fault,something to do with the usb charging system,,So i would advise anyone with this specific problem,to send phone back,and get a replacement..hope you get it solved
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Hello,
Had the same problems aswell, only mine had a bunch of other problems aswell:
When I shut down my mobile it restarts itself and then shows a yellow exclamation mark with an tempgage. Only way to turn on my phone is to connect it with the charger, turn of my phone again, remove the charger and then the phone turned itself on again but without the temp gage.
My phone also thinks its charging when it is not, and when I am actually charging it, its not charging.
Also my PC does not recognize my phone so I am not able to update it.
I have also sent my phone for a repair, I will keep you guys posted.
greets from the netherlands
Yep, mine only got fixed by going into service. It got its mainboard warranty switched.
T- Mobile sent me a replacement phone
They seemed to know the symptoms when I explained what was happening
Same fault for me. Mainboard replaced, works fine now.
Sent from my GT-I9100 using XDA App
How did you guys get it fixed? Did you have to ship the phone out somewhere? How long did you have to wait to get it back? What was the process?
Thanks.
Mine is going to be repaired in two weeks.
I was the 8th SGS2 since tuesday which came in the repair center.
The repair guy said it is a manifacturing fault.
The phone gets hots, and outside temperature is cold, so it makes moisture in the phone.
This cause the phones power management to get fu up (SGS2 has a small battery inside of it, and that gets fu up). Only fix is replace hardware, but 9 of 10 times Samsung gives the fault to the customer. They say it has water damage and can't be fixed in warrenty...
I'm going to write a huge article about it, and I hope it will get published by a lot of site's soon. Phones he admitted having the problem: SGS1, SGS2 and SGSN.
I charged my GS2 2x by USB and it's discharged faster than by the sector
The USB power isn't enough for charge up the GS2 correctly
Are you guys suffering from rapid battery discharging, i have all of the above symptons but my battery drains within hours...I`ve even bought a brand new battery off ebay that is exacly the same issues... I`d like to send it back to O2 but i`ve rooted and flashed custom firmware...
Having some random and annoying screen fluctuations. Its like the screen depolarizes and the images become distorted and somewhat inverted. Happens off and on and reboots do not help. Im gonna go back to stock just incase it needs to be sent in and to see if the ROM I am using is completely to blame, I have tried reflashing too.
Just thought I put this out there to see if anyone else is having similar issues.
I may have had something similar the other day - basically the color blue would go away, and the remaining R&G pixels would smear. Best way to describe it would be to pretend that there is a specific frame buffer for blue, and it has a pointer, and that pointer was getting whacked. Meanwhile the pointers for the red and green buffers were having less-significant bits screwed with. Yeah, like I said, "pretend". My initial gut said it was a simple case of some bad silicon on a line driver. Done.
While getting ready to exchange the Tab (aka removing stuff), I discovered the behavior was strongly impacted by memory pressure. If you've played with ESXi, you know what I'm referring to. If not, go read about Ballooning.
With lots of crap floating around, screen gets more wonky more often to the point of being unusable. Including during the boot splash screen. Remove the junk (not programs - just... stuff, music, browser cache, whatever)... less wonky, less often. Still wonky, mind you, but less wonky, and less often.
Decided the culprit was likely Task Manager by Rhythm Software. Removed exactly it, cold started, and never had an issue since. Note that I'm not really keen on saying Rhythm's work was at fault, especially since saying "it's fixed!" is trying to prove a negative and this is not a reported problem. OTOH, the behavior did start within a few days of installing it, and the behavior's ending exactly coincides with RTM's removal.
In that sense, take a close look at what you're installing - something otherwise fine might be suffering an... unexpected feature.
HTH,
- sbb
Thanks for the tip, mines still looking like hardware failure. Sometimes when i put it into the samsung keyboard dock it randomly clears up, as if the jiggle in the pin connector port affects it but it will reappear eventually.
Been trying to use the return to stock stuff from the main sticky in the development section but it keeps erroring and failing in CWM when I attempt to flash. Oh well.
Thanks for the reply yo!
I think its because the stock rom they have is p700 and I am p7510 or whatever. Am I in the wrong place? lol Time to scavenge the forums.
Unroot for Return
So, I made my backup copy of my ROM after it was rooted. How do I get this thing rooted again so I can take her in? I tried using the info on the stickie in the Dev section but I get an error when flashing the supplied stock ROM, repeated, no mistakes I am pretty sure.
Any tips?
also, hasnt been 30days, should I just go back to best buy or call samsung?
I have the exact same issue with my tablet and going to return it for warranty. I had to unroot and get it back to default blind, since the screen is almost never readable here (too much distortions).
I got it back to factory default (unrooted) through ODIN + Download Mode. Use the files and step-by-step guide on this webpage: http://droidangel.blogspot.com/2011/06/samsung-galaxy-tab-101v-p7100-stock-rom.html
I got the same problem. the screen just distorted, which happens on several custom ROM. It happens after heavy use. I have to put it aside for a couple of hours to get it back to normal.
Is that hardware issue? If it is, how could you convince the shop to get it replaced?
you may not be able to reproduce it at the shop.
I lost my interest to samsung product. It took quite some time to create an account and file a case. Now the webpage just keeps telling that it is processing the data.
I remember that I have never succeed to create an account through the TAB.
very bad service.
Well, mine's finally going in for repair.
As mentioned in the post above... after removing a few apps and most of the data from the tab... not a single issue with the screen, since.
Then... the behavior came back last week, gradually becoming worse until the colors are just plain hosed. Blew out the browser caches, wiped any remaining data... pulse, etc... and it cleared back up again... for about an hour, but rapidly reverted back to horrid. Did a hard reset... no avail.
It is quite the interesting behavior, to say the very least.
It's not mechanical. It's not thermal.
Is samsung service center the only solution for this?
Does yours look like this?
www youtube com/watch?v=WauTDdzxGq0
(Sorry, you;ll need to fill in the obvious missing doys. It was either that or posting 8 random posts)
My Tab also has similar issue and it still appears after hard reset, trying to convince the shop to exchange or help me to send back to Samsung.
Did Samsung cost you any charge for repairing? The shop say it need charges and they don't want give any help.
not really. Mine has distorted display but more likes adding white noise.
Seems that sumsung really sucks. products have so many different issues.
pholklore said:
Does yours look like this?
www youtube com/watch?v=WauTDdzxGq0
(Sorry, you;ll need to fill in the obvious missing doys. It was either that or posting 8 random posts)
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simgamer50 said:
My Tab also has similar issue and it still appears after hard reset, trying to convince the shop to exchange or help me to send back to Samsung.
Did Samsung cost you any charge for repairing? The shop say it need charges and they don't want give any help.
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I was covered by seller warranty. I sent it back, and the seller sent me a new device. I don't know where you're at, but usually sellers are required to handle this for you, if under warranty, _by law_. This is obviously a manufacturing fault, not bad usage.
Stupid thing is that I can do everything to it aside from getting it to boot all the way to work! I tried reflashing OEM roms and I tried custom roms. They all work just fine and it just won't boot all the way. I can turn it on and off, use format option, download mode and magldr. I keep my sim out and memory card. Before this all happened I always used OEM OS. Last thing I did was check my bank account, close the browser and click the power button to turn it into sleep mode. Few weeks ago I did have an issue with it for a day. It kept turning on and off constantly boot to random points. Mostly to the AT&T screen. It would boot all the way rarely and I got it to stay on a couple times for about 10 mins to copy all my stuff from it. Is it possibly something to do with the hardware being a POS and Just crapping out for no reason because cell phones are poorly made expensive bricks?
I've seen this issue across the forum several times. Unfortunately, just one case seemed to "return" to life, without understanding the reasons behind the "lapse".
What I can suggest you can do (and feel free to disagree) is get in touch with Cottula (creator of MAGLDR) and see if you can help you. You can send him the phone, maybe he can analyze it and get something out of it.
GL, mate, and if you find a solution, I'm sure other folks here would be glad to hear it.
Ahhh ok thats what I figured. I browsed a bit, but most of what I saw is people couldn't do anything. I didn't see anyone saying they could do as much as what I can do with it. I'll try your advice and see if maybe he could help. I took apart the phone to see if maybe someone came loose, though I saw nothing. Clean as a whistle. What I think maybe happen is it burnt up finally. I notice at times it would run extremely hot, mostly when I'm talking on it for more then an hour.
Well, for your sake I hope it's not burned out (hardware issue). I hope it has some software component that's screwed and that has a chance of being investigated and maybe fixed.
Also, the getting hot while talking/browsing for periods more than 30 min it's a known issue. It's however supposed to be quite warm, but not actually really hot, if you know what I mean. It it however possible that exposing the phone to higher temperatures to cause hardware issues.
In any case, I wish you good luck. Who knows?
I gave AT&T a call to see what they could do. The software warranty is 6 months past and she wasn't able to override anything that much passed over. Though I was able to get my 2 years wavered and get a early upgrade. So I got myself a Xperia Ion. I'm happy I don't have to put up with a flip phone for another 4 months. lol
I tried working on my focus a bit more playing with zune and other programs I found. Though I don't see it coming back to life trying all the different ROMs. I would think to make it work again is to re-flash the actual phone bios itself. Just like a computer starting it still uses DOS then loads the OS. I don't know how a phone works to much, but I'd assume same process. Something to do with the root-root of the phone telling it to be stupid and not boot properly.
Another note, where is the best place to sell this to get some money out of it? Screen and other pieces of its hardware are 100%. Should I try ebaying it?
I had a similar issue, last thing i did was removing the SD card before re-flashing the MGLDR and custom ROM
When it rains it pours. In a previous thread I explained how my phone would not boot up. I ended up successfully doing a firmware upgrade through kies which erased everything and brought me back to kit kat.
I was downloading all my apps again in the play store when the phone froze. After waiting a few minutes I did a battery pull. The phone will not turn back on now. My battery was at 80% when it froze. I tried plugging it in and no lights come on. I have held the power button for over a minute and nothing. I tried holding power, home and volume up and nothing. I tried plugging it in the cpu and nothing. I have also left it alone to maybe cool down for a while and nothing.
I'm having a bad phone day and hope someone can help. Thanks.
I think your phone maybe faulty you should take it back to the retailer for a replacement if possible.
The same thing has happened to me as well, but this isn't the first issue that I've had with this phone nor is this the first phone that i have had issues with. I truly think there is a much bigger problem then we are aware of and it has nothing to do with the phone owners. I think there is something wrong with the phone itself; now what that is i don't know. But what i do know is that there are thousands of people who are all dealing with one issue or another. Many of those people are just like myself who pay good money for their phones and expect to the quality and service that their money should buy. But it doesn't and in the end it we are the one's who are ultimately paying the price. And i mean that literally.
Something needs to be done about this. I think its time that we the people start to use are voices and speak up. There are issues at hand and at the very least they need to be addressed and fixed. Furthermore it's time that some of the blame is taken off our shoulders and placed on those who are responsible. My email is: [email protected] If you would like to see something be done about this, please email me. I could use your support. Thank you.
P.T. Kenny
bring it back to samsung service center and tell them what happened
Hi XDA Developers. I'm newbie here so I want to explain my problem as far I it is possible.
Starting from the beginning:
On lonely afternoon I was watching a YouTube (CPU usage approx. 1-5% I think. No multitasking.) and accidentally my smartphone turned off
(It was a matter of milliseconds).
After seeing this, I tried to restart my beloved phone,(In my country it has the best money/performance ratio.)
but nothing happens.
Next step is to read about Recovery Mode/Factory Reset mode, but nothing works.
After that I connected G2 to computer with Windows(R) Operating System. Guided by the Masters of Android Operating System(XDA-Developers of course ), searching for QHSUSB, but unfortunately nothing shows(I was a little upset, because I don't found a similar thread).
So I want to ask you Dear Masters. What next to do?
Many thanks for help.
PS. I used a Desperate ROM http://forum.xda-developers.com/lg-g2/development/rom-desperate-rom-t3437472 and Lambda Kernel http://forum.xda-developers.com/lg-g2/development/kernel-lambda-kernel-t3270424
Thread bump.
EDIT: I read about hard brick issue resolve on: https://forum.xda-developers.com/lg-g2/general/lg-g2-unbrickable-fix-real-hard-brick-t2904404, but nothing happens.
Just last week my G2 turned off in the middle of writing an email.
It no longer charges, turns on, or responds in any way. the LED never comes on when I plug it in, and my computer doesn't detect in. it is basically a paperweight.
Did the same thing happen to yours?
I also tried everything I could in the "UNBRICKABLE" thread but I could never get it to turn on in any way. Either shorting the capacitors is much more difficult than I thought., or my phone is forever dead.
One guy in the thread seemed to think he was better than everyone else, and seemed to think he knew how to 'truly' unbrick the LG G2, but he didn't respond to my email, and his account is currently 'disabled' ( aftabalam8c2), and all of his youtube videos are no longer listed... so i guess that's a dead end, maybe you could try him? The thread is filled with other rude people thinking they know better, but none of them really have anything concrete to contribute...
I tried shorting the caps for about 5 hours so far, but I haven't gotten anything to happen, and I've pretty much given up... Perhaps someone with more experience will chime in, but for me, i am back to using my old iPhone 4