My LG G2 will not turn on after installing new battery - G2 Q&A, Help & Troubleshooting

I cannot turn on my LG G2 after putting a new battery in it that I bought of LG.
I have tried to hold the vol down and power button together will plugging into power source but to no avail.I have held just the power button while plugging into power but to no avail.
Any help would be much appreciated.

Try to carefully check the electric contacts: re-open the case and press enough all the electrical connectors. I solved this way...
There may also be a chance of damaged battery (it is hard to find an original one): in this case you have to ask for replacement.

MotoGix said:
Try to carefully check the electric contacts: re-open the case and press enough all the electrical connectors. I solved this way...
There may also be a chance of damaged battery (it is hard to find an original one): in this case you have to ask for replacement.
Click to expand...
Click to collapse
I have checked all the connectors umpteen times and they all click into place.
I got the battery from LG so it is a genuine LG battery has stated in my post.

I had same problem with my Optimus G

I change the battery last year with a battery I bought off Ebay without any problems.I then found out the battery was not genuine (not holding its charge) and I bought a battery from LG.When I replaced the battery I bought off Ebay with the battery I bought from LG my G2 would not turn on.
Is there a tool which I could use to test my G2 phone (download a tool/app)?
Could it be an hardware issue?

Shlong7 said:
I change the battery last year with a battery I bought off Ebay without any problems.I then found out the battery was not genuine (not holding its charge) and I bought a battery from LG.When I replaced the battery I bought off Ebay with the battery I bought from LG my G2 would not turn on.
Is there a tool which I could use to test my G2 phone (download a tool/app)?
Could it be an hardware issue?
Click to expand...
Click to collapse
I bought the battery on ebay, since I don't have access to any LG store.
After a first failed attempt, I removed and reinserted the battery and the phone turned on. I attributed the issue to an electric contact but my assumption could be wrong and there were likely other reasons...
Unfortunately, I am not able to suggest to you any workaround. You may ask directly to LG, where you bought the battery...
There is a hidden menu (3845#*802#) for testing battery and charge efficiency, but phone must be turned on, then you have to use the old battery.
Anyway, I don't think it is an hardware issue.

I bought another battery off eBay to see if it was the battery but the phone still won't turn on.

It sounds not good... Are some electrical contact pins of the phone possibly damaged or dirty?

MotoGix said:
It sounds not good... Are some electrical contact pins of the phone possibly damaged or dirty?
Click to expand...
Click to collapse
No,they look alright.
I did press the power button on the phone before I put the white camera cover on and the main white phone cover on.

So much the better!

What possible think could I have damaged?

Shlong7 said:
What possible think could I have damaged?
Click to expand...
Click to collapse
Sorry, I understood you solved the problem (misunderstanding due to my poor English).
Look carefully at all the pins of the connectors (screen, motherboard, etc.): Are they alright or bent over?
If they are bent over you can try to straighten them with an electronic nipper.
On the contrary, if they are OK, my advice is to go to the LG service center (for example where you bought the new original battery) and ask them to check the phone hardware. Perhaps it is just a stupid issue, easy to solve. It is still a great phone, even though it is 5 five years old, and it's worth it. It is even faster of my most recent Motorola X Play...
Unfortunately, I have not enough experience with this phone, so I can't help you anymore: I own it since few weeks only, because it is my wife old phone. I was just lucky in substituting battery with negligeble issues!

I have looked at all the pins on each connector and they look all in line.
May I have damaged the charging ribbons when I pressed the power button before I put the camera cover and the phone cover back on.
I have noticed the black tape on the camera cover (https://www.ebay.co.uk/itm/LG-G2-Ca...368363?hash=item2833f4ba6b:g:FWsAAOSwIaFZFH5k) is damaged,could this cause my G2 to not turn on?

Shlong7 said:
I have looked at all the pins on each connector and the look all in line.
May I have damaged the charging ribbons when I pressed the power button before I put the camera cover and the phone cover back on.
I have noticed the black tape on the camera cover (https://www.ebay.co.uk/itm/LG-G2-Ca...68363?hash=item2833f4ba6b:g:FWsAAOSwIaFZFH5k) is damaged,could this cause my G" to not turn on?
Click to expand...
Click to collapse
I don't think so: the power button acts on a switch; you can press on the switch in many other ways, with the same results...
Check instead the electric contact on the camera cover (see 2nd image of the camera cover, top-left of the above link): it is a sort of electrical bridge (closes the circuit). You may verify if it works right by means of a multimeter (null resistance).

MotoGix said:
I don't think so: the power button acts on a switch; you can press on the switch in many other ways, with the same results...
Check instead the electric contact on the camera cover (see 2nd image of the camera cover, top-left of the above link): it is a sort of electrical bridge (closes the circuit). You may verify if it works right by means of a multimeter (null resistance).
Click to expand...
Click to collapse
Im not good at using multi-meters.
What should I set the range of the multi-meter when testing the electrical bridge on the camera cover?
What should the multi-meter read when testing the electrical bridge to see if it works?

You should simply get zero resistance. Multimeters are easy to use: at first, select to measure resistance, by setting the highest sensitivity (the smallest full-scale), then measure the resistance. There are many tutorial on YouTube.
Please, consider it is possible this is not the problem!
Anyway, I'd suggest you warmly to send the phone at the service centre.
Sent from my LG-D802 using XDA Labs

Yes,I do get zero resistance when testing the electrical bridge on the camera cover.
It will cost alot to have it repaired at the service centre,probably not worth having my G2 repaired bc the battery cost me £40.

You're right, it might not be worth it.
Before throwing away the phone, try to ask where you bought the battery. Perhaps they will find a solution for you.
Another phone with similar specs costs more than 300£, for sure; moreover, most of phones have the cover in glass or alluminium and are more delicate than G2...
Sent from my LG-D802 using XDA Labs

I have been in touch with LG where I bought the battery from and they said the repair would cost more than I paid for the phone,which I predicted.
I don't think the battery is faulty (I bought another battery of eBay and the phone still won't turn on),unless the eBay battery is faulty too.
Could I have damaged the power switch if I pulled out the power switch connector while the battery was connected?

I am so sorry.
But, just for curiosity, what is the damage?

Related

Dropped phone = DEAD IMATE JAM ! *HELP*

Hello all,
I recently dropped my phone and when I tried to turn it back on, it wouldn't turn on. There's no light on anywhere in the phone. I opened up the phone and checked all the connections, seems like everything is still intact and connected. I have given up on trying to diagnose the problem on this phone, so i'm asking y'alls help. Could it just be a battery problem? or is it a hardware problem that's unfixable? Can I send this phone somewhere and get it fixed, if so, how much would it cost me? Thank You in advance.
Its more unlikely for the battery to get damaged on drop down. Its definitely a hardware. Hope your baby is still under warranty, the you can even get a replace done for free. Else the charge may vary by the diagnosis. Anyway i hope it wont be of much expense if the display is intact by the dropped force, probably there wont be of much damage.
Regards
Carty..
Hi,
I had the same prob. & send it to the service center. Luckily they replaced my phone for free. Still don't know what the real problem was, very unlikely the battery though cause I got it back with a half charged one (probably mine which I had to send in as well).
No good news for you afterall, I do really feel with you in these horrible times.
Regards, M
Yeah, i'm thinking of just buying another phone, because I don't have warranty on this phone anymore and even if I did, I have voided the warranty on it by opening it up. I'm still gonna get a new battery for it though, just to see if it is the battery, if not then I guess my loss. Atleast I found out that it wasn't the battery.
Does it show evident marks of being opened up by you? Cause that was the main reason I didn't try opening it, too afraid voiding the warranty. Though I had it unlocked & patched for BS too.
So I just gave it a try & in my case it worked out fine.
Refards, M
I suppose, problem is connected not to battery, but to battery cover/switch. Look at the photo: there is a pin on the battery cover. Usually, when cover is on the right place, it presses the switch down. Try to check at first, if switch is broken or not. When pressed, it have to short circuit. You can just short it by piece of wire and see, what's happened. If swich is not closed, jam will never turn on, even if you have charged battery, or AC adaptor connected.
JDark said:
I suppose, problem is connected not to battery, but to battery cover/switch. Look at the photo: there is a pin on the battery cover. Usually, when cover is on the right place, it presses the switch down. Try to check at first, if switch is broken or not. When pressed, it have to short circuit. You can just short it by piece of wire and see, what's happened. If swich is not closed, jam will never turn on, even if you have charged battery, or AC adaptor connected.
Click to expand...
Click to collapse
I tried that already, but I will check the cover and see the latch on the battery cover is broken or not, maybe it is. I'll try it when i get home.
if you want to salvage it for parts, I'll buy the ear piece (mini speaker in the front) from you.
balut said:
JDark said:
I suppose, problem is connected not to battery, but to battery cover/switch. Look at the photo: there is a pin on the battery cover. Usually, when cover is on the right place, it presses the switch down. Try to check at first, if switch is broken or not. When pressed, it have to short circuit. You can just short it by piece of wire and see, what's happened. If swich is not closed, jam will never turn on, even if you have charged battery, or AC adaptor connected.
Click to expand...
Click to collapse
I tried that already, but I will check the cover and see the latch on the battery cover is broken or not, maybe it is. I'll try it when i get home.
Click to expand...
Click to collapse
tried it when i got home, but still no luck. Do you guys know where I can send this to? and how much do I expect to pay? Thanks!
LordPhong said:
if you want to salvage it for parts, I'll buy the ear piece (mini speaker in the front) from you.
Click to expand...
Click to collapse
I'll have to wait and see first, maybe my phone can still be saved.
Oh man, i'm so relieved right now. This whole time I was wondering if I had to buy a new phone, since my jam is broken. I just found out that the US service center for HTC is located right by my house. It's just a relief, I will stop by there office on monday to see if they can fix my imate jam. Thank god !
Hope the best for you @ very low cost.
M
dropped off the jam there this afternoon, the cute lady service tech took my jam and said she'll run some diagnostics on it and call me whenever she gets done with it. Hopefully it's fixable.

Hermes bricked? Toasted? Need assistance urgently!

Before anyone jumps on me, I've been going through the Wiki and forums extensively, and found just one similar problem. Which wasn't solved...
My HTC TyTN/Hermes 200 won't boot up anymore. It is totally dead. I even can't get it into bootloader mode. Screen stays blank and the LED is off.
Put the (3 months old) battery in another Hermes to test it, and it's at 100% charge.
My Hermes shows a steady red LED when it's plugged into power without the battery in, and no LED at all when the battery is installed. The red LED turns off when the battery is installed while there's power going into the unit.
I've left the battery out for at least an hour, plugged it back in, same results. Like the other guy I tried the "pull power, pull battery, plug in power, plug in battery, reset" trick http://forum.xda-developers.com/show...6469&p=1077622 - to no avail.
Does anyone have any last resort ideas on how to get it to at least come back up to a boot loader screen ?
check the battery contact points on the phone. the hermes shows a red led when its plugged in but without a battery
... have you ever dismantled your hermes? your screen ribbon cable may have dead tracks or not be connected properly
just a test on the opposite side of the battery connectors with battery removed press firmly without putting pressure on the LCD, this worked for me when i had a white screen on power up.
if this fixes the problem you may need to actually dismantle the back and put some flame retardant electrical tape on the back over the existing tape to add an extra layer of pressure and retension
XtreMe_G said:
check the battery contact points on the phone. the hermes shows a red led when its plugged in but without a battery
Click to expand...
Click to collapse
Yes, I have cleaned the contact too, nothing. And the battery is OK for sure, my colleague's TyTN runs on it without any problem.
Mattnokis said:
... have you ever dismantled your hermes? your screen ribbon cable may have dead tracks or not be connected
Click to expand...
Click to collapse
In fact I have, I have totally dismantled and reassembled my TyTN yesterday afternoon, nothing.
the only other problem may be that when being dismantled you may have damaged some sensitive components, Electro Static Discharge will fry sensitive CMOS components, they do not like it at all, whenever dismantling you should wear an earth strap, any time i dismantled mine it was on a workbench with a static mat and i was earthed through the mat.
but this is one possibility, the only other idea is to swap main board and displays with another that works, finding someone willing to allow you to do this with a working hemes is the tough part.
thats as much all i can think of for now
R.I.P. my trustful Hermes 200
Thanks all for your assistance. I have come to the conclusion that my sweetheart is no longer among us. May she rest in peace.
I have obtained a (2d hand) replacement yesterday. May this one last longer.
I'll keep the old TyTN for replacement parts.
Oh well...

to all who are expert with lg smartphones,help please!! (about lg g2)

hello guys
i charged my lg g2 (d802) under the pillow (i know it,s a dump move) all over the night
in the morning , i found the phone very hot that i couldn't hold it and since then the phone wont turn on , wont do anything like there is no life in it:crying:, i know its a hardware issue ,but can someone tell me what iam dealing with and what i should do ?
thanks for your time
shldm_g2 said:
hello guys
i charged my lg g2 (d802) under the pillow (i know it,s a dump move) all over the night
in the morning , i found the phone very hot that i couldn't hold it and since then the phone wont turn on , wont do anything like there is no life in it:crying:, i know its a hardware issue ,but can someone tell me what iam dealing with and what i should do ?
thanks for your time
Click to expand...
Click to collapse
help please ????
shldm_g2 said:
hello guys
i charged my lg g2 (d802) under the pillow (i know it,s a dump move) all over the night
in the morning , i found the phone very hot that i couldn't hold it and since then the phone wont turn on , wont do anything like there is no life in it:crying:, i know its a hardware issue ,but can someone tell me what iam dealing with and what i should do ?
thanks for your time
Click to expand...
Click to collapse
I'm pretty sure you fried it. It could be anything from the screen to the main board =/. I'm happy that nothing happened to you, however. Had it been a *ahem* Samsung *ahem* or if you just had some horrible luck it would probably have caught fire, so be happy that it didn't happen.
oooh god
vPro97 said:
I'm pretty sure you fried it. It could be anything from the screen to the main board =/. I'm happy that nothing happened to you, however. Had it been a *ahem* Samsung *ahem* or if you just had some horrible luck it would probably have caught fire, so be happy that it didn't happen.
Click to expand...
Click to collapse
really ,thanks god?
i also noticed that the phone gets worm(upper part) when i try to charge it
shldm_g2 said:
really ,thanks god?
i also noticed that the phone gets worm(upper part) when i try to charge it
Click to expand...
Click to collapse
remove the back cover and then the plastic cover that covers the motherboard (the top piece). Disconnect the battery connector and reconnect it. Try to power it on. If that fails, put your device with the screen facing down on a table and while trying to turn it on (keep pushing power button) push gently with your finger/nail the lower bottom of this small battery connector. If it turn on then use a tiny plastic/elastic thing, or just some tape, to do the same job that your finger did when you put back the plastic cover. Dont think that since it power on its ok, cause it will not charge or turn on or reboot if you dont put something to keep pushing the battery connector. If none of these work, then you have a serious hardware damage. But i want to believe its just the battery.
ok
i will try this and come back with results
thanks for your time?
Sp_Ark said:
remove the back cover and then the plastic cover that covers the motherboard (the top piece). Disconnect the battery connector and reconnect it. Try to power it on. If that fails, put your device with the screen facing down on a table and while trying to turn it on (keep pushing power button) push gently with your finger/nail the lower bottom of this small battery connector. If it turn on then use a tiny plastic/elastic thing, or just some tape, to do the same job that your finger did when you put back the plastic cover. Dont think that since it power on its ok, cause it will not charge or turn on or reboot if you dont put something to keep pushing the battery connector. If none of these work, then you have a serious hardware damage. But i want to believe its just the battery.
Click to expand...
Click to collapse
i did what u told me to do,still not working
but i noticed a couple of things
first the heat is coming from the area under the battery connector(while trying to charge the phone)
second when i remove the battery connector the phone is not heating up (when i try to charge it)
Try again the problem might be with this small battery connector, it's a common damage. Usually when I repair g2 and face this problem i put a small ball of electric tape and problem gets fixed. The thing with yours is that your battery must be totally drained so even if you find the right spot to push this connector, there is going to be a delay till the phone starts charging again. You can try a new battery for about 10 to 15 euros. The thing that you felt heat under the connector is not necessarily bad. There is nothing under this part so this shows that electricity goes there. You can wait 5 minutes to see if it will start charging. Sorry for my English...
Sent from my LG-LS980 using Tapatalk

Replaced battery, now digitizer works but I can't see anything on the LCD.. help!

I'm unsure if I'm having the same problem as a person who decided to replace his screen assembly had, but I'm in a situation where I can't tell if it's a software issue or a hardware one.
I've checked the cable under the battery and everything looks great, it even reseats just fine. the other ribbons are plugged in just fine...
I'm not sure where to begin, please help!
Any thoughts at all? I banged my head against a wall all night!
kroenem said:
Any thoughts at all? I banged my head against a wall all night!
Click to expand...
Click to collapse
I can't imagine it would be software if it was working before you took it apart. My first thought would be dinged ribbon cable under the battery of course but you said its fine. You could check terminals on motherboard and ribbon cable with a magnifying glass or camera on zoom mode to make sure nothing got bent and no debris got into the connection when reassembling. Not the first time I've seen someone damage the display when replacing a battery on this forum unfortunately. There's a few cases of this in the oem battery thread.
hawkswind1 said:
I can't imagine it would be software if it was working before you took it apart. My first thought would be dinged ribbon cable under the battery of course but you said its fine. You could check terminals on motherboard and ribbon cable with a magnifying glass or camera on zoom mode to make sure nothing got bent and no debris got into the connection when reassembling. Not the first time I've seen someone damage the display when replacing a battery on this forum unfortunately. There's a few cases of this in the oem battery thread.
Click to expand...
Click to collapse
Thanks for the heads up.. the cord and connector look just fine
kroenem said:
Thanks for the heads up.. the cord and connector look just fine
Click to expand...
Click to collapse
Sure does look fine. The only thing I notice is the debris or whatever it is on the solder pads halfway down the left hand side in the motherboard picture, it's in two spots. I wish you luck.
Nope! nothing
Mine had a problem of a pink hue after the battery replacement I did, I'm pretty sure it's because I separated the screen and LCD a little at one time..oh well least it don't die randomly
hawkswind1 said:
Sure does look fine. The only thing I notice is the debris or whatever it is on the solder pads halfway down the left hand side in the motherboard picture, it's in two spots. I wish you luck.
Click to expand...
Click to collapse
Sooo I got another (Broken) nexus 6p for $30 off ebay and swaped the motherboards. I plugged it in and got a red flashing light - I then replaced the battery with my new one and all that happens is when I plug it in I feel a vibrate. I try to turn it on and it vibrates... exactly like the problem I had before. Ugh, it must be the socket (? I think that would be the term) and not the screen. hm.
kroenem said:
Sooo I got another (Broken) nexus 6p for $30 off ebay and swaped the motherboards. I plugged it in and got a red flashing light - I then replaced the battery with my new one and all that happens is when I plug it in I feel a vibrate. I try to turn it on and it vibrates... exactly like the problem I had before. Ugh, it must be the socket (? I think that would be the term) and not the screen. hm.
Click to expand...
Click to collapse
The phone you bought had a bad motherboard and good screen assembly? Anything come on screen if you hold power and volume down buttons simultaneously for 5+ seconds? Or hold volume down while plugging it into a computer. Any joy if you install your original battery from original 6p? Kind of lost without being able to see it. Just throwing out some ideas.
I have your same problem... did you solve it?

Zuk Z2(plus) not charging fix

So my brother's zuk z2 has been broken for months now, and no repair shop could repair the phone.
I did a lot of digging and i found out that zuk z2 has a problem with quick charge 3.0 (It technically supports it but it doesn't have the necessary hardware for it)
If your zuk z2 (plus) has these symptomes this fix is guaranteed to work
Not charging.
Not turning on (Sometimes it might turn on).
Notification light blinking.
Heating in the lower part of the phone near the charging port. (If your zuk doesn't do that, then removing the cx chip will only disable fast charging)
The problem:This tiny chip with cx on it: https://i.imgur.com/YD8Eh2b.jpg
This chip is responsible for quick charge and it only supports quick charge from the original charger (that is what i was told).
When charging with an qc charger it may short out. That is where the heat is coming from.
The solution
You need to remove that chip.
You can just pry on it with a screwdriver and it pops out like its meant to do that.
Anyone can do this procedure at home, but you need a phone repair kit(<1$ online).
Or you can take your phone to the local repair guy and send them a link to this guide.
If you decide to do this by yourself i advise you to watch a teardown video, because there are some plastic tabs that you don't want to break.
1) First off, remove the sim card tray and then you need to remove the back glass, use a hair drier at the lowest setting and heat the lower part of the back of the phone (where the zuk logo is) around the perimeter.
When the glass is hot, use a suction cup to lift the glass and then use a plastic tool (only plastic tools) to slice the adhesive.
Try the suction cup method 3-4 times with heating, because the suction cup may not be strong enough to lift the glass up.
If the suction cup is not strong enough to lift the glass away, use a very thin and short piece of metal, wedge it between the glass and the plastic body (this will slightly damage the plastic) and the glass should pop out if it's hot.
Be very careful at the left upper side of the phone (the camera side) because there is the volume and power button ribbon and the battery ribbon. You don't want to damage those.
This is maybe the hardest part of this teardown.
This is how it looks like once the back cover is off: https://i.imgur.com/XGD5m7F.jpg
2) Because the chip is on the back side of the motherboard you will need to remove almost every component except the battery and some other smaller components.
Remove all screws.
Attention! one screw is under the battery ribbon.
Then try to remove the plastic.
The top plastic piece needs to be pulled from the opposite side of the back camera because there is a plastic latch near the back camera.
Pull that plastic piece up and then to the left (away from the back camera).
The lower plastic piece should be pulled from the upper most part, but it should be pulled first up and then pulled towards the top side.
If the piece doesn't move you need to remove residual adhesive or try to remove the lower plastic piece from the headphone jack side.
This is how it should look like without the plastic top cover: https://i.imgur.com/qEtXTg7.jpg
This is how it looks like without the bottom plastic piece:https://i.imgur.com/RlVhDQK.jpg
The problematic chip is in the red circle, but it is on the other side of the motherboard.
3)Unclip the connections, the antenna connectors, and the selfie camera.
By this point you should have removed the sim card tray, if not remove it NOW.
4)Remove the motherboard with the back camera (its held with some copper tape).
Inspect the charging port.
It should look something like this: https://i.imgur.com/bKiN5tG.jpg
The chip is very small.
This is how the chip looks like when removed: https://i.imgur.com/fCSJBds.jpg
This is the chip you want to remove: The one with CX on it!
This chip: https://i.imgur.com/YD8Eh2b.jpg
5)Remove the chip with something made out of metal, like a screwdriver.
6)Reassemble the phone and enjoy your charging phone.
Also this is why you would want to do it yourself.
This is what a "repair guy" did to the phone: https://i.imgur.com/5BiMn6s.jpg
He said that there was a short on the motherboard and the phone is completely dead.
The phone works, but now i don't have a power/volume button.
He obviously used a metal tool, as seen by the scratches left on the metal inside the phone.
So don't use a metal tool.
Edit: Removing this chip will only disable fast charging, if your device is perfectly working, or has different symptomes, don't remove this chip.
Edit2: The thread was broken,(only one image was showing). My dumb ass inserted the images wrongly.
Will removing this enable quick charge 3.0 support on our device ?
troublesom said:
Will removing this enable quick charge 3.0 support on our device ?
Click to expand...
Click to collapse
No
My phone is bot charging. So will removing this chip make it charging again??
And how it is so that without that chip it will work properly??
Does OTG work after removing it?
Sandeep7974 said:
My phone is bot charging. So will removing this chip make it charging again??
And how it is so that without that chip it will work properly??
Click to expand...
Click to collapse
Don't remove it .it regulates charging speed and safety
spandu500 said:
Does OTG work after removing it?
Click to expand...
Click to collapse
It does.
zuk z2 plus
thanks bro
its work for me
It did not work for me, unfortunately. I removed the black part of the chip and the problem continued, just stopped blinking the led and vibrated continuously. I removed the silver part of the chip and nothing, it continued in the same way without charging. But I figured out a way to charge it, I entered the TWRP menu, (by clicking on the power button to enter the recovery it would turn off, then I pressed the button to enter the recovery, it hung up and when it was already on the twrp). At the TWRP recovery I connected the charger, and then the ZUK started charging the battery more slowly than normal, but it charged 100%. I have it for at least 2 years, I always used the original charger, only 2 or 3 months I changed the cable that broke. So I believe this is not a hardware problem, but a software problem. I use the Cardinal rom, but it seems that this happens in any rom ...
Isaías J. said:
It did not work for me, unfortunately. I removed the black part of the chip and the problem continued, just stopped blinking the led and vibrated continuously. I removed the silver part of the chip and nothing, it continued in the same way without charging. But I figured out a way to charge it, I entered the TWRP menu, (by clicking on the power button to enter the recovery it would turn off, then I pressed the button to enter the recovery, it hung up and when it was already on the twrp). At the TWRP recovery I connected the charger, and then the ZUK started charging the battery more slowly than normal, but it charged 100%. I have it for at least 2 years, I always used the original charger, only 2 or 3 months I changed the cable that broke. So I believe this is not a hardware problem, but a software problem. I use the Cardinal rom, but it seems that this happens in any rom ...
Click to expand...
Click to collapse
I am sorry for you.
I really don't know if there can be such a software problem. (have you tried clean flashing?)
Did your phone heat up a lot when charging in the usb area?
Did the procedure fix the heating?
If it charges in any way, that is not a hardware problem.
Are you using any kind of rom tweaking apps (like kernel adiutor or smartpack kernel manager) if yes check in the battery section if charging is enabled or just uninstall them.
Try flashing the stock rom.
I know it is a pain in the butt to try all of these things, especially if your zuk is your primary phone (my zuk is not my primary phone and it has a problem with flashing custom roms that i haven't fixed in months)
I didn't try the original rom, it's too bad. It also has no kernel or overclocking app. Moreover, the device did not heat up in the usb area, only in the area of ​​the processor, when it was charging, was always like this. What made a difference before the problem was that it got too hot, especially playing pupg, which I've done a lot in the last few days, and then he hung up. He always hung up, but it was rare to happen, days before the problem he started to hang up almost every day.
But I have something new, I saw the gmail notification of your message yesterday, so today I came to respond. The device was in the TWRP menu, charging, I turned on the system and the led turned on. As I write the battery charged 10%!
JoraForever said:
I am sorry for you.
I really don't know if there can be such a software problem. (have you tried clean flashing?)
Did your phone heat up a lot when charging in the usb area?
Did the procedure fix the heating?
If it charges in any way, that is not a hardware problem.
Are you using any kind of rom tweaking apps (like kernel adiutor or smartpack kernel manager) if yes check in the battery section if charging is enabled or just uninstall them.
Try flashing the stock rom.
I know it is a pain in the butt to try all of these things, especially if your zuk is your primary phone (my zuk is not my primary phone and it has a problem with flashing custom roms that i haven't fixed in months)
Click to expand...
Click to collapse
And the problem returns.
thank you i try remove the cx chip and it work after remove it charging decreased a bit from 2100 ma to 1980 ma and volt from 4.4 to 4.1:fingers-crossed::fingers-crossed:
Working, thanks!
it worked for me! many thanks!
JoraForever said:
So my brother's zuk z2 has been broken for months now, and no repair shop could repair the phone.
I did a lot of digging and i found out that zuk z2 has a problem with quick charge 3.0 (It technically supports it but it doesn't have the necessary hardware for it)
If your zuk z2 (plus) has these symptomes this fix is guaranteed to work
Not charging.
Not turning on (Sometimes it might turn on).
Notification light blinking.
Heating in the lower part of the phone near the charging port. (If your zuk doesn't do that, then removing the cx chip will only disable fast charging)
The problem:This tiny chip with cx on it: https://i.imgur.com/YD8Eh2b.jpg
This chip is responsible for quick charge and it only supports quick charge from the original charger (that is what i was told).
When charging with an qc charger it may short out. That is where the heat is coming from.
The solution
You need to remove that chip.
You can just pry on it with a screwdriver and it pops out like its meant to do that.
Anyone can do this procedure at home, but you need a phone repair kit(<1$ online).
Or you can take your phone to the local repair guy and send them a link to this guide.
If you decide to do this by yourself i advise you to watch a teardown video, because there are some plastic tabs that you don't want to break.
1) First off, remove the sim card tray and then you need to remove the back glass, use a hair drier at the lowest setting and heat the lower part of the back of the phone (where the zuk logo is) around the perimeter.
When the glass is hot, use a suction cup to lift the glass and then use a plastic tool (only plastic tools) to slice the adhesive.
Try the suction cup method 3-4 times with heating, because the suction cup may not be strong enough to lift the glass up.
If the suction cup is not strong enough to lift the glass away, use a very thin and short piece of metal, wedge it between the glass and the plastic body (this will slightly damage the plastic) and the glass should pop out if it's hot.
Be very careful at the left upper side of the phone (the camera side) because there is the volume and power button ribbon and the battery ribbon. You don't want to damage those.
This is maybe the hardest part of this teardown.
This is how it looks like once the back cover is off: https://i.imgur.com/XGD5m7F.jpg
2) Because the chip is on the back side of the motherboard you will need to remove almost every component except the battery and some other smaller components.
Remove all screws.
Attention! one screw is under the battery ribbon.
Then try to remove the plastic.
The top plastic piece needs to be pulled from the opposite side of the back camera because there is a plastic latch near the back camera.
Pull that plastic piece up and then to the left (away from the back camera).
The lower plastic piece should be pulled from the upper most part, but it should be pulled first up and then pulled towards the top side.
If the piece doesn't move you need to remove residual adhesive or try to remove the lower plastic piece from the headphone jack side.
This is how it should look like without the plastic top cover: https://i.imgur.com/qEtXTg7.jpg
This is how it looks like without the bottom plastic piece:https://i.imgur.com/RlVhDQK.jpg
The problematic chip is in the red circle, but it is on the other side of the motherboard.
3)Unclip the connections, the antenna connectors, and the selfie camera.
By this point you should have removed the sim card tray, if not remove it NOW.
4)Remove the motherboard with the back camera (its held with some copper tape).
Inspect the charging port.
It should look something like this: https://i.imgur.com/bKiN5tG.jpg
The chip is very small.
This is how the chip looks like when removed: https://i.imgur.com/fCSJBds.jpg
This is the chip you want to remove: The one with CX on it!
This chip: https://i.imgur.com/YD8Eh2b.jpg
5)Remove the chip with something made out of metal, like a screwdriver.
6)Reassemble the phone and enjoy your charging phone.
Also this is why you would want to do it yourself.
This is what a "repair guy" did to the phone: https://i.imgur.com/5BiMn6s.jpg
He said that there was a short on the motherboard and the phone is completely dead.
The phone works, but now i don't have a power/volume button.
He obviously used a metal tool, as seen by the scratches left on the metal inside the phone.
So don't use a metal tool.
Edit: Removing this chip will only disable fast charging, if your device is perfectly working, or has different symptomes, don't remove this chip.
Edit2: The thread was broken,(only one image was showing). My dumb ass inserted the images wrongly.
Click to expand...
Click to collapse
Thank you so much for this post, I have just done this and my zuk is charging again! Thank you sir for this post! :fingers-crossed: :good:
I deleted this chip, but after that it stopped connecting to the PC. The drivers all stood, the cable was working. Then I had the urge to change the firmware to https://forum.xda-developers.com/le...rom-flyme-7-3-0-0a-zuk-z2-plus-bylzy-t3923861, but he went into the bootloop, and then probably the battery played Darth Vader in Return of the Jedi.
Removal of the chip fixed my ZUK as well!
Thank you TS!!!
I must really thank you for the guide. My phone stopped charging suddenly, tried different cables, chargers, etc and none worked. I was about to go buy a new phone and somehow stumbled on this thread. After a few days getting the courage to open the phone, i did it, followed the guide and now it is charging!!
Thank you very much!!!
Big thanks, my zuk is now working again :good:

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