Database Develop

Battery Quits / Stops Charging - My findings and fix

So like many others, I have a AT&T Tilt, 8925 or HTC Kaiser that quit charging with some of my chargers. My symptoms were like everyone else. It will charge with a car adapter, or "X" brand of wall charger but for no reason just quit charging one day.
Here are the four charging methods I am using, and the different symptoms when this issue presented itself.
1. Wall A/C charger that came with the phone.
2. Car charger that I got from AT&T store.
3. USB cable plugged in to my laptop.
4. Wall A/C charger for "some other" device.
When I first got the phone, all of the above worked. Then after a few weeks, this happened.
Wall Charger
Still worked. No change.
Car Charger
Charging LED would not light up. Phone would not charge.
USB Cable
Charging LED would not light up, but I could Sync the phone with WMDM.
Wall Charger (other brand)
Charging LED would light up, but the phone would not charge.
So I went through and real a lot of posts and I first made sure I had "When device is turned on, do not charge the battery when connected to the PC" unchecked. This did not help.
Then I started looking closer to my phone. And I noticed what seemed to be one of the pins on the mini USB port was bent back in to the middle plastic piece that stands in the middle of the connector. When holding the phone face up, it was the pin to the far right. See my picture below. (I wish I had a before picture)
I removed the battery from my phone and used a small pick to VERY GENTLY pull the pin out a bit. I did my best to make it look like the other four pins to the left. You can also see in the picture, that the 4th pin is bent back a bit too but I left it alone. I did not think it was bent enough to cause a contact issue with the connector. After fixing this, I installed the battery and tested it out. And to my surprised, that fixed the problem.
So, the question is, how did this happen???
Well, I suspect it's from trying to stuff the stylus in to the reset button but missing and hitting the mini USB port instead. That middle "stand off" piece of plastic has some flex to it. So by stuffing the tip of the stylus in the corner of the USB port, that likely flexed that plastic back which also bent the pin. Note that the pins are not attached to the plastic piece, so that is why only one pin bent and not all of them.
Long winded sorry. But perhaps may help out.
And take this all at face value. This is just what was wrong with my phone. Mileage will vary.
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Xperia Z dead(Reverse Polarity)

So i accidently plugged in the usb the wrong way and the phone shut off. Have tried every button combination and holding down the powerbutton numerous times with no success. Led light doesn't light up and have tried leaving it in the charger for various hours and used different chargers. My next step was to disassemble the phone and hope a battery pull did the trick but that didn't work. However when I disconnect the black battery connector and plug in a usb the red led lights up for about 15 seconds and dissapears.
anyone know any possible solutions? I think my battery might have fried
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Is there a way to jump the battery and hope that that works? I've jumped plenty of batteries on phones with removable batteries but I'm not sure if the Z has metal contacts for negative and positve

no one?

normally any device that has DC input (like usb) is secured with diodes so that even when a faulty charger is connected it doesn't fry. But that's my electrical knowledge speaking. Please reply when you found out what the problem is

laandennis said:
normally any device that has DC input (like usb) is secured with diodes so that even when a faulty charger is connected it doesn't fry. But that's my electrical knowledge speaking. Please reply when you found out what the problem is
Click to expand...
Click to collapse
My One X did fry when I connected it to a car charger not too long ago
still no luck on this phone however

How did you even manage to connect the usb the wrong way? lol

wawyed said:
How did you even manage to connect the usb the wrong way? lol
Click to expand...
Click to collapse
**** happens lol what sucks is that as soon as it made contact the phone turned off

adolfo778 said:
My One X did fry when I connected it to a car charger not too long ago
still no luck on this phone however
Click to expand...
Click to collapse
Alright thx for the info but maybe you had another problem with you charger and the transformation from 12V to 5V was bad, that can't be controlled with only a diode. Or maybe your One X hadn't any security internally because the manufacturer wanted to save money on that component / no place anymore to put it in the phone.

Think I have something similar..... Connected to car charger, led didn't go red,pushed charger in moved wire in phone charger goes off, phone won't start tried all button combos.
Sad bit is I only just got phone 3 days ago:banghead::banghead::banghead::banghead::banghead:
Sent from my C5303 using xda premium

Can anyone else comment on this? I recently did this and my Xperia Z will not turn on. Would replacing the battery work or is the damage related to the other internals?

Do you see any damage to the usb port?

ngvuanh said:
Do you see any damage to the usb port?
Click to expand...
Click to collapse
No I don't see any damage to the USB port.

I did the same to my xperia Z1 (reverse biased it using usb and 5 volts wires) The battery however had charge so as soon as I connected the phone restarted and could not charge any more. Any solution please ????

Might be an old post but I had the same problem. I was fixing a cable (18V) and I wanted the range the cable in the corner. I was so lazy to use a screw driver or something else. So I used what I have in my hand: The jack cable, plugged into my phone. So I used the bare part of the cable (Don't ask me why, I don't know). I don't remember if my phone restarted, but he was fine. But not my jack connector. When I plug an earphone it says that my earphones are not recognized. So I change it (by my self) But still the same problem...
Seems like the problem comes from somewhere else.

do you found the fried parts of your phone or fixed it ?
i have same issue today i connected an experimental cable (v+ was placed into gnd pin and gnd to v+) to my lumia 625 and it flashes then shut off immediately now it show no sign of life not charging not turning on
anyone knows what parts have been fried ?

Need help with unresponsive USB port

My Z3C's USB port has become unresponsive, it wont charge the phone nor connect to a computer.
The phone itself works as it should, apart from the USB.
It does sense that it is plugged into a charger when in an off state and boots into the battery charging screen however no charging takes place and there's no animation of the battery icon or change in the percentage. The magnetic charging port does work though.
I can't get my computer to recognise the phone in either standard mode, fastboot or flash. However when connected by USB I can get the phone into fastboot (steady blue) or flash mode (red/green flash), it's just my computer doesn't pick up anything.
I've tried several cables, chargers and computers so all that can be ruled out.
I've verified the continuity between the end of the USB port (that connects to the computer/charger) to the pins soldered to the main board of the phone. Everything seems fine. I reflowed the solder of the USB connector just to be sure.
I'm at a loss, anyone got any ideas?

doby_p said:
My Z3C's USB port has become unresponsive, it wont charge the phone nor connect to a computer.
The phone itself works as it should, apart from the USB.
It does sense that it is plugged into a charger when in an off state and boots into the battery charging screen however no charging takes place and there's no animation of the battery icon or change in the percentage. The magnetic charging port does work though.
I can't get my computer to recognise the phone in either standard mode, fastboot or flash. However when connected by USB I can get the phone into fastboot (steady blue) or flash mode (red/green flash), it's just my computer doesn't pick up anything.
I've tried several cables, chargers and computers so all that can be ruled out.
I've verified the continuity between the end of the USB port (that connects to the computer/charger) to the pins soldered to the main board of the phone. Everything seems fine. I reflowed the solder of the USB connector just to be sure.
I'm at a loss, anyone got any ideas?
Click to expand...
Click to collapse
if phone has warranty use it, i had this problem in some phones sometimes mic fails as well and I had to change usb flex for galaxy s2 and 3. Sometimes is for humidity on usb flex.

I've just been inspecting the mainboard closely near the usb port and I think there's a component missing. No idea how it has become detached.
The phone is an ebay salvage project, but I'm sure when I received it I could charge it fine through the USB port although it wasn't soon after that it started having problems. Now I'm doubting myself that it ever charged in the first place.
Anyway I'm now looking for a high res photo of the Z3C mainboard (battery side). I've got a dead Z1C with the same components near the USB port but as the components are arranged in a different orientation I'm unsure of which way round to solder it to the Z3C.
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Edit: Found the pic I was looking for in the service manual, soldered missing component in place and it's now working!

"Moisture in charging port" and Samsung PMC (Power Management Chip)

I've been getting this "Moisture in charging port" message recently and after Googling the symptoms I was very discouraged because "fixes" did not seem to work. Phone would only charge wirelessly and my nexJack Dex would only work when the USB C was plugged in one orientation only, if at all.. Eventually I paid ubreakifix to replace the USB C charging port and the problem has gone away.
Why am I posting this you ask? Seems very straight-forward. However the ubreakifix tech said he found evidence of a PMC failure and some "electricity was leaking" and causing the battery to age faster and will cause other failure modes to the phone such as I was experiencing. I was/am skeptical because the only method he used was to plug some "special" equipment into the USB C port. He was confident that he didn't need to recheck after the port replacement.
Has anyone else encountered a PMC problem with their Note 8? There is actually a YouTube video of a PMC Note 8 replacement---not for the faint of heart.

Hi, test to clean data and cache on USB Setting (system application) and reboot.... It's OK for me now.
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Envoyé de mon SM-N950F en utilisant Tapatalk

Actually I did this without any good result. Replaced the charging port and all is well for my case. Your case, of course, could be different.

Could be that the port is faulty...

mmarquis said:
Actually I did this without any good result. Replaced the charging port and all is well for my case. Your case, of course, could be different.
Click to expand...
Click to collapse
Same happened to me few times, especially after going to swim and put my phone in my wet pockets, the solution was to plug the original charger (even with the message of moisture) and reboot. After the reboot the phone was able to charge via USB again, although I charge it wiresly most of the times.
I don't know but several persons helped that method, maybe just a software error.

I have the suspicion they're reading data from the phone, not directly from the hardware; and if that data is the result of a software issue (I'll get to that below), their voltage leak is a faulty assumption. My experience:
Same problem here. I tried a ton of fixes: new cables, new chargers, safe mode boot, USBDevice data wipe, Dalvik Cache wipe, full reset, etc. but none of them worked for me. Closest I got was holding down Bixby button on boot and then plugging in cable-- which would let me charge normally UNTIL I unplugged the first time; would always get moisture detected after that until next reboot....
Was ready to replace hardware at ubreakifix....
UNTIL I found this solution in a single obscure Youtube comment:
1. Reboot
2. Plug in cable on first logo
3. Unplug when 1st logo goes away
4. Quickly plug in again on 2nd logo.
It worked like a charm for me. Now I have no issues.
This confirms to me that there was some odd software flag that was tripped. My guess is that there's a baseline voltage the phone measures for charging, and when the voltage is under that baseline, it throws a moisture error. I bet this sequence causes the phone to measure a new baseline, thus resetting the bad data that tripped the moisture flag previously.
Just a guess, but would make sense.
mmarquis said:
I've been getting this "Moisture in charging port" message recently and after Googling the symptoms I was very discouraged because "fixes" did not seem to work. Phone would only charge wirelessly and my nexJack Dex would only work when the USB C was plugged in one orientation only, if at all.. Eventually I paid ubreakifix to replace the USB C charging port and the problem has gone away.
Why am I posting this you ask? Seems very straight-forward. However the ubreakifix tech said he found evidence of a PMC failure and some "electricity was leaking" and causing the battery to age faster and will cause other failure modes to the phone such as I was experiencing. I was/am skeptical because the only method he used was to plug some "special" equipment into the USB C port. He was confident that he didn't need to recheck after the port replacement.
Has anyone else encountered a PMC problem with their Note 8? There is actually a YouTube video of a PMC Note 8 replacement---not for the faint of heart.
Click to expand...
Click to collapse

Question Broken screen - access internal memory

Hi,
A maniac stole my phone and almost destroyed it. No more screen. Sadly I had some photos from my kids, birthday party and did not backup them :/
When I pluged the phone to a windows computer I see Pixel 7 on the device manager. I think I activated the developper mode though
I went to my local IT strore and he tried with an USB-C-HDMI adapter to see the screen on a computer screen, nothing appears.
Any hint ?
Thanks !
PS : Next move, buy a new pixel 7, plug a mouse and make the same movement to click the right digit and get in the phtone :/

Do u try to transfer data to new phone using USB cable?

One solution is to buy a replacement screen and connect it. You don't have to install it, just let it dangle.
What is your screen lock? If it's alphanumeric you can just use a keyboard.
You need to see what USB interfaces are active. MTP? ADB?
I wrote something to let a master Android login swipe a slave Android, see: https://forum.xda-developers.com/t/accessing-my-phone-with-a-dead-screen.4542763/post-88013171

I try to save some pictures in DCIM with an USB cable to my computer. Should I try with another phone ? ???
A replacement screen is about 250 €
How do I know which interface is active ?
In your solution the slave Android seems to have adb active.

hubertes said:
In your solution the slave Android seems to have adb active.
Click to expand...
Click to collapse
No, the slave has to simply support OTG (which I'm sure the P7 does).
The master is acting like an absolute digitizer (and not a relative mouse) and also a keyboard.
If ADB is not on, this allows you to navigate to Settings and turn it on.
It's not simple or easy.
You'd need a rooted master of any random model.
You'll probably want a 3rd Android to test the master Android.
You'd need reference screenshots from some helpful P7 owner.
The video shows how, with a BT keyboard paired to the master Android.
There is the additional problem of there being no "hot key" for settings.
You'd have to remember where it was on your launcher.
OTOH, if you did have ADB already enabled all you have to do is unlock the P7.
Even if the screen is black the touch sensing may/may not be broken.
Use this utility https://ftdichip.com/utilities/#MicrosoftUSBView (or lsusb -v if you're on Linux).
Find your device in the left pane and copy/paste the text in the right.
(You can redact your serial number.)

It's really nice to help me like u do
Sadly it seems that my destroyed pixel 7 stoped to send data to my computer. I don't see anything on my w$ devices.
Do someone know if the motherboard "starts" with only the battery pluged-in ?
Which pin should be active to start up ?
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Most devices that have a battery require a battery.
Batteries include a circuit board with the BMS (battery management system).
You're showing four contacts, quite a common setup.
One is for minus, one for plus, one usually for a 10k NTC thermistor to minus.
The fourth could be a simple resistor as identification of the battery pack or a one wire communication to some monitoring on the battery pack.
I'd need a better photo to say anything.
Is that your board? Did you remove it from the case?
You should probably just try to run things normally with the battery connected.
Ok, I often run Androids on a power supply but it requires care and a bit of know-how.
The advantage is that you can see if/how the device is booting.
I think this is a Moto E6 booting up, but I forget.

Found 0 ohm between contactor 1 and 4 when I push the power button in regard to those pins, so it should be it.
I still have 10 % hope, but the battery wont charge anymore...
NB : motherboard photo is from here

Did you check the battery for voltage?
With 99% certainty the two power pins are the outside two.
Is it possible that more than the screen was damaged?
It seems more likely that without an active screen you left it on until the battery died?
Heck, this thing is practically brand new.
Edit: Huh? I saw the video. The battery is connected on a mezzanine connector. I thought that first photo you posted was showing the battery connector.
It sucks that apparently the P7 only natively supports "GoogleCast" and not a Type C alt-mode video.
You can't get a slightly damaged (but working) screen from a repair place? You could just plug it in. Even just to borrow one.

The battery pion is so uncommon(mezzaine connector ?), I d'ont know where to make the measure :/
Yes it is possible, like I said it was a maniqac who destroyed my phone
The phone was 80 % full and left for a week end on the ground under water but fliped back (no water on the motherboard)
Yeah, my phone was 2 month old :/
NO video possible through usb C then ?
The screen costs approximatively 250 €. The maniac destroyed it ion purpose (connector screen riped of)

So the screen was actually removed?
I presume that you've tried to charge it?
Do you have one of those little USB adapters that measure voltage/current?
Can you see if it's trying to charge?
You won't be able to probe/measure anything on the mezzanine connector easily.
Since you're not sure of what is working, this is one of those cases where measuring current on the USB and the voltage/current on the battery are your first steps.
You might want to CAREFULLY remove the battery and take off the tape at the top of the battery until you can see the two tabs of the actual battery.
Be very careful not to short anything!
Do you have an adjustable bench power supply?

Hi,
Don't have those tester. Went to my it store, nothing's charging whern pluged in :/ I did remove the tape, but don't see any +/- tabs :/
could I try with the wireless charger ?
I could have such a bench in my highschool yes.

hubertes said:
I did remove the tape, but don't see any +/- tabs
Click to expand...
Click to collapse
If you remove enough layers of tape (only on the TOP of the battery where the flex circuit goes in) you should see some shiny (somewhat) flexible tabs about 5mm wide.
Don't bend them too much and break them.