Like a lot of LG devices I wasn't able to find a teardown guide for general knowledge, and if i needed to replace something. I decided to use my personal LG G2 (D800) and make a quick teardown like the one I made for the LG Nitro (P930) on the XDA forums.
What you need
Well how about removing the SIM tray...it's the little teardown victories
Now peering into the SIM tray slot at an angle you can kinda see the back is separate from the metal bezel
Starting from the bottom corner, use the thin blunt side of a Spudger to separate the back from the metal bezel. THIS CAN CAUSE COSMETIC & INTERNAL DAMAGE if you are not careful.
Use a thumb nail, plastic spudger, or pry tool to raise one side releasing the plastic clips. Then raise the other side and the top should pull off with ease.
With the logic board exposed using a plastic pry tool unhook the flex cable clips and the 2 antennas.
Start with the battery connector.
Camera & Volume keys
Front camera & Prox. Sensor/LED
2 antenna wires (NOTE: these antenna and flex connectors are heavy duty.)
2 flex cables joining the bottom board to the logic board
The flex cable running up the right side of the battery is connected to a smaller board, which is held to an EMI shield on the logic board with a small amount of adhesive; it can be carefully pried up.
The same thing can be done to the other side. Peel up the tape holding the flex cables down remembering where they went.
At the other end, 2 big flex cables are brought together by a small control board. Disconnect the 2 clips (Green - LCD and Orange - Digitizer) and the other ends of the antennas. Then remove the antenna wires completely.
This small control board is also held down by a little adhesive, but can be carefully pried up.
We should now have removed the 2 big flex cables attached to their respective mutual boards, the 2 antenna wires and the main logic board.
We can now start the process of removing the battery. Using a flat plastic pry tool, pry up the edges of the battery and work your way to the middle from all sides.
The third pic is what we should have after the battery is removed.
At the bottom of the phone is another very small board almost like a piece of metal tape. It's held down by a small screw. Remove the screw, and peel up the piece. I'm 99% sure it's strictly for grounding purposes, but none the less is still important.
TIP: When prying up circuit, logic boards, or small pieces like this it's best to start where a screw was removed, because often the area is reinforced and protected.
You should now have just the screen assembly. I didn't remove the LCD or digitizer. I've found separate, and full screen assemblies on the web, but I've also read LG is making it quite affordable to repair the screen by sending it to them.
As always here's a look at it all.
For reassembly start from the very last step, and go back in order. REMEMBER fellow fixers, either repair or recycle.
I followed the instructions to the letter to disassemble the phone to replace a cracked screen and re-assemble it recursively. But, the light/proximity sensor/LED no longer work. The sensor is checked working with another G2, however.
I double checked and could not find any loosen connection. Is the board damaged? Please help.
Maybe someone can help me with my issue...
Phone will not turn on, just replaced the battery and now the Red LED light blinks when I plug it in.
Obviously it's not getting a charge, but when I hold down the power button, it will blink for almost exactly 8 seconds and then stop blinking for a moment, and then resume blinking and repeat.
This phone is not rooted, and I just replaced the screen on it before it went to ****.
After that, it turned on once, I rebooted it to put the SIM back in, and it wouldn't turn back on.
I have a new USB Charging Port and Flex Cable assembly coming, and I'm hoping that will fix it, but if it doesn't, the only other part that I can think of is the motherboard, and I don't want to have to pay $100 to replace the mainboard... Maybe a bad antennae cable, or some sort of POST check that doesn't pass before the battery will initialize?
The phone is out of warranty, and I am not above replacing parts.
Any help is appreciated!
You can try disconnecting and after reconnecting the battery passed 1 or 2 minutes.. In my case, it doesn't fix all the issue but the phone boot again
(Do U have a stock ROM?..)
Tested, is the battery..After I replaced the battery the phone works like a charm
The small circuit board held with the screw, does anyone know what this does? Mine broke when I was taking apart my phone. Thanks!
@slimchance2001 - Well, ya know, bad pics and all, it was a user donated time thing. Sure the fuzzy pics may barely irritate, but I can think of many late nights in the distant past where that wouldn't have mattered because i couldn't have found my nose if you put my hand on it.....and still attempted to do this. Things aren't that way today so I see a lot clearer now. Whatever is fuzzy in your pic....its not fuzzy in this disassembled and being repaired G2 in front of my face. I didn't need a picture book, i needed a guide. Thats what you threw out there. Thanks for it.
I'm not really sure what the grounding would be if anything it's on that smaller board and it's gold strips touching other gold coils to be honest though it sounds more like a bad replacement part was your screen doing that before replacement? If the connections weren't proper I'm not sure the screen would display anything but for good measure clean all metal on metal connections and avoid touching them with your bare hands make sure all connectors are in their place and secure do a power on test before reassembling
hello from greece,
i have a problem with an lg - g2 phone. i changed the digitizer screen as it has broken, and the screen had two problems. The first was that when i started calling somebody, the screen was off, and i couldn't see what happens. I could only hear if the call is answered and i couldn't stop the calling, unless i spoke with bluetooth.
the second problem was that after some days the screen did not work properly (i can send fotos and videos). Vertical lines appeared. So i opened the phone and trying to find what happened i reallized that the battery connector which is close to the usb charger was not very well fixed. I disconnected and connected while the phone was on and then it has never switched on. What could have happened?
Does anyone know which chip is used in LG G2 for Wifi/BT? I could not find out from the teardown. Thanks.
Dear, Please advice me if you knew where it is.. thanks
Hi, the chip # is 15012 BCM4335 Module (MURATA) as you look at the Main PCB, it's on the top of the PCBat the top left corner
My G2 is stuck on "turning on wifi." I have done a factory reset (even though I didn't want to!) and it did not fix the problem. I opened the phone and checked all connections to ensure nothing was loose. Still nothing. In reading on other forums, people have posted the same problem and had the phone repaired. Repairman said it was a "hardware issue." Any clue what hardware? I really need to fix this problem but don't exactly want to buy a bunch of parts I don't need.
Boss, same problem here... tried everything such as back to stock, different ROM etc... we are not only the few... Please let me know if you could identify the wifi hardware so that I will try what they tried in case of apple 5s (?).. overheating the phone reportedly said to have fixed wifi issue which is assumed to have joined back any soldering gaps.. thanks
It is 2 days i have the same flashing wifi and non-connecting bluetooth problem. After long searches I found a diagram that is for LG internal use and for technical people. it shows that the bluetooth and wifi is controlled by the same component. it explains why both are not working at the same time. Here I don't see an option to post the attachment but I will post you the link to download it and also write the part number so if someone wanna fix it him/herself have a guide. it is on page 112.
if you wanna fix it yourself then please search youtube to how to dissemble and put it back together.
U15012 - wifi/BT module.
Hi G2 selfix ,
The link doesnt work, can you send again or send me to e-mail, email@example.com
I found another link for tecnical doc for LG D803 and show the wifi/bt parts.
I found another link for tecnical doc for LG D803 and show the wifi/bt parts.
https://mega.nz/#!mYdH3CRB!PcUgSVKfRoJ5q... hi i have the same problem and need this diagram to solve it kindly send firstname.lastname@example.org
veej Rai -
Which part controls the speaker? Mine has stopped working
Speaker's on the mobo and fairly exposed to water damage if it so occurs - other than cleaning the goldfingers/contact pads and tightening the ~6 screws on the upper plastic shield (the plastic shield is required to be in-place for sound to work), you might be out of luck.
I´m, having also Problems with Speaker. After Replace the Screen Speaker doesn´t work. I had changed the Flex Cable and Speaker (lower Plastic Part). But it doesn´t work :(
Why must be the upper Plastic Part installed to work speaker?
I had the same problem you have. It turns out that the speaker is in the lower cover. Not the upper cover mentioned elsewhere. Here's a picture to help me explain: http://imgur.com/akIB9Cy The upper piece in the photo contains the speaker. You'll notice the contacts on the thin portion. The lower piece is the ribbon cable that goes up the left side of the battery. Notice the contacts on the piece that hangs off of the cable. Apparently a lot of us end up compressing those contacts in the process of removing the cover that contains the speaker. What you need to do is use some tool to carefully uncompress the contacts on the ribbon cable. That should let them make contact with the speaker contacts and fix your sound problem.
Just to note for those with D802, they will have a smaller flex cable connector for digitizer
I wish I had read this before doing the teardown myself and finding the digitizer connector was too long for the D802...does anyone know where I can buy a replacement flex board (circuit board with digitizer socket on) for this model - D800 - and does anyone know if it would be compatible with the D802 model?
Would buying a flex cable for ls980 allow me to install an ls980 logic board to my d802??
I apologize about the bad pics and vague decriptions i should have labeled it a disassembly ,but it was tue middle of the night i wad bored and ifixit didnt have a guide at all but questions about a few things so i used my personal phone to make this . If anyone wants to make a better one feel free and ill tell the ifixit team to take this one down to anyone this guide has helped glad it did your welcome
Hi please tell me how to change antenna of that phone because my phone signals are off now
Thanks walter i know the pics are bad i didnt really look at them until after i had my g2 back together and like i said i used my sisters S3 camera not a high powered nikon or anything like the ifixit techs use.
@chris i didnt have my micrometer handy to gwt a good measurmwnt of te screws but all of them are the same size except that black one i mentioned in the guide hope that helps
Do you know if the sim reader is soldered on to the main board or something? Or is it easily replaceable? Sorry I don't know much about phone repairs, but my sim reader is completely screwed and it looks like the phone is effectively bricked unless I can replace it somehow..
Reinstall the display software? What service center the carrier or manufacture ? Did you need a new screen or was there another problem or reason for leaving your phone with whoever?
How small does the screw drivers have to be? I live with a friend, and he has really small precision screw drivers for his Rolex. Will those work? Or will I need something a little bigger/smaller?
@Howard Lin I used a #00 screw driver it's pretty small but there are smaller size
@Kyle Shaw your welcome man glad to help
Slim, thank you for this guide. I "threw" my phone in the toilet when I tripped on the rug leading into the bathroom and thought my G2 was done for.
But this guide gave me a quick and simple breakdown to get to the guts so I could air dry the beast out. Everything seems to be working great on it, and this was after it was going haywire before I could unhook the battery.
I should note, I have a VS980 (Verizon LG G2), but once I got past the back shell, the innards were exactly the same. Again, thank you so much for this, you saved me a lot of money, stress, and time.
I'm really not sure if you say the flex was tested and working on another phone then it can't be the part and you say the connection isn't loose when reinstalling it the only thing I can think of is one of the pins in the connecter on the logic board and/or on the flex was broken I doubt you could find the replacement for the logic board but look really close maybe take some pics with a really camera and make sure none of those pins are bent or broken.
@blackstar & WellTrainedVC no problem guys glad to help
I'd just let it charge for a solid 8 hours if it's a new battery it most likely didn't have much of a charge when it left the factory if any so give it a good charge and post back if nothing changes worst case scenario it's a short on the main board
ZEOSAGECARNEY read my last post for some reason it posted it above yours about giving it a charge
I would try cleaning any corrosion from the connectors and any where else it's evident on the hardware especially metal connections if that doesn't help then look into changing parts
It charges wirelessly right?
I want to know where is the component that is responsible for the wireless induction.
Need help! Can you show me how to change the simcard slot? My G2 cant detect my simcard anymore and i've bought a new sim card slot/reader, but i dont know how to change it. I manage to tear down all the parts, but the sim slot seems like it is permanently attached to the board. Help please....
I found another link for tecnical doc for LG D803 and show the wifi/bt parts.
I found another technical document for LG D803, and show the wifi/bt parts.
I broke off the tiny left side tab at the end of step 6 :( Now what? I'm trying to replace the battery as it seems to have failed completely. I already upgraded to a new phone, but I need to get this lg to power up long enough for me to backup all the $@$* I should have had backed up from the start. What does that tiny side tab do? Will it have a major effect? Someone please help. I'm on a roller coaster of hope and devastation trying to retrieve important data and pics.
I broke off the tiny tab on the left side at the end of step 6 :( Now what? What is the function of that tab? The battery seems to have completely failed and I'm only trying to replace it so I can power up just long enough to retrieve the data and pics I never backed up (kicking myself hard for putting that off over and over>_<). Someone please help. I'm on a roller coaster of hope and devastation with this thing.
Can anybody please point out/tell me where the EMI Filters are?
My G2 screen started to jitter after more than 2 years of usage, and an LG technician told me it's the EMI Filters' fault. He also said that the only way to fix the problem is to change the mobo where the EMI Filters are :-(
I am wondering if there is any workaround to fix it without having to change the mobo, which costs as much as a brand new Redmi 2 here :-D
can you please enlighten men in step 5 about "2 flex cables joining the bottom board to the logic board" are they also responsible for the digitizer to work?
can anyone here enlighten me on step 5 about "2 flex cables joining the bottom board to the logic board" what does it really do? besides that? is it responsible for the digitizer to work? i'm having issues about my digitizer not working and my lcd w/ digitizer is fine. i'm doubting if it's the motherboard broken or the flex cables.
My G2 802 is having problem with GSM signals and GPS signals.
What am i thinking is to connect two antennas with flex connectors but unfortunately i don't know the exact flex connectors for GSM and GPS signals as i can see 4 flex connectors on its back.
Kindly help me out plzzzz !
Weak signal problem is making me wild !
what part of this motherboard is connetion fo scree? I have phone which works but screen dont works (do not switch on) I have changed twice 2 different displays..
Blinking red light and phone not turning on or charging when plugged in might be fixed by holding down all three back buttons at the same time for 15 seconds or so, I dont know how but it worked on mine! Also, leaving it plugged in for a few hours can fix it. Mine turned off and wouldn't make it past unlock screen for more than a second or so then eventually stopped getting past ATT logo. I baked my motherboard in the oven at 325 for 8 minutes and now it works. i have a bleached screen im not sure from what and SIM card is detected but no mobile network and have no idea how to fix, please help! i have a parts phone bought to fix an unresponsive digitizer, but been too scared to switch out digitizers so i pulled the cover off both phones (both were complete phones with charged batteries) and (painstakingly!!) connected the digitizer to the other phone and used the touchscreen from the other phone while looking at the working phone!
Hi guys what about Lg g2 F320s ?I recently changed my screen that was broken,but i also have a bad GPS and phone signal...Is there a way to fix this?
Where is the internal memory located on the motherboard of G2? Does changing the motherboard wipe out the whole memory?
I have LG G2 (L-01F) model. Some days back i open the back cover and perform step 3, 4 and 5. And cover put back. When try to switch on, my phone would not On. Again open the back panel and check the all connectors and switch on the phone.. phone is on .
But again put the back cover , its again not switch on.
Please can any one help me.
Followed your guide to replace my LCD and digitizer with a new one from eBay. Found removing the motor a bit tricky as they really stick those things down well. 10/10 for a great tear-down. Thanks.
Hi all, I have the G2 (Sprint) and kept it on vibrate most of the time. 3 days ago, I received a notification - it vibrated & the screen lit up and immediately shut off! The battery had over half charge, but I haven't been able to get it to come back on or acknowledge being on a charger. It won't do anything! I took the back off, per these instructions, but have no idea what to look for that could be the issue. My son seems to think that the vibration worked a connection lose somewhere… HELP! Thanks.
Bu kılavuzu göm
Choose a size and copy the code below to embed this guide as a small widget on your site / forum.