Database Users

[Q] Red Light - Charging without back?

So, I plugged my Nexus 4 into a generic car charger and it went black instantly. The battery was at about 92%. With the hope that a proper AC or computer USB charge connection would bring up the white battery icon and fix things, I stopped by an out of town T-mobile. The manager tried the button battery-reset (up volume + power for 60sec) and I googled alternatives and tried the - enter recovery by pressing those buttons for 15sec off the charger and connecting while still holding down the buttons - trick. Neither worked.
The manger seemed familiar with that and the other button pressing tricks, and said that really, my only real hope would be to reset/replace the battery, but that would void my warranty. However, although the T-mobile site claims my Google bought phone is under warranty (and I've been paying for it each month), technically, it isn't. Under them or Google (any more). So, I purchased the tools to open the phone, as well as a replacement battery. In the interim, I tried to use all the button combos and various charging connections to get it to come back to life. I *did* manage to get it charging the old battery. I know because the blinking red light turned constant for an hour or two, and the battery got warm. I can only guess that the battery was too damaged to keep the charge however, because I could never get it to turn on during or after. My best guess is that the software battery reset allowed the phone to send a charge to the battery - at least once.
After getting my tools and replacement battery, I managed to get the phone open (with great effort - I think there must be a difference between batches there). I removed the old battery connection and looked to see if I could get the charge icon with it unattached and on the charger. I couldn't. Reconnecting the old battery didn't seem to make any difference.
I was about to go through the process of prying up the old battery when I realized that you can actually connect the new battery to the board connector without getting the old one out. So I did that. Leaving it charging like that for awhile didn't do anything, so I decided to do another software battery reset and I'm letting it sit on the charger overnight. All of this has been without reattaching the back.
So my major question is - does anyone know for sure if the phone actually charges the battery with the back off? I know there are important circuits there - which seem to shut down the phone after the battery or google image when not detected (at least that's my deducement after reading posts). But are those connections also used in charging? The Qi goes though the back to the charger function, so perhaps that connection has to be there? I would like to try and find out though beforehand. It took 2 hours and two mangled guitar picks to get it open the first time, and the second may be just as trying. (And believe me, towards the end, I was not concerned with being gentle.)
I am also curious about the four prong battery connection. I've seen the post about charging the battery using external sources by connecting to the two outer pins. Does that mean the two inner pins constitute a second circuit between the charged battery and the phone? And if I find another 3.8v battery fully charged, I could perhaps connect that to the phone instead by wires and get it booted into recovery? As to why I'd want to do that, I don't recall the last dated CM version I had installed, so finding that in their folder plus pulling off everything from /data... assuming I replaced this with another Nexus 4, I might be able to save myself a lot of setup hassle.
In terms of the red light... it actually seems to be an error code. When triggered, it blinks 7 times, and on the eighth stays lit for a bit before repeating.

cetkat said:
So, I plugged my Nexus 4 into a generic car charger and it went black instantly. The battery was at about 92%. With the hope that a proper AC or computer USB charge connection would bring up the white battery icon and fix things, I stopped by an out of town T-mobile. The manager tried the button battery-reset (up volume + power for 60sec) and I googled alternatives and tried the - enter recovery by pressing those buttons for 15sec off the charger and connecting while still holding down the buttons - trick. Neither worked.
The manger seemed familiar with that and the other button pressing tricks, and said that really, my only real hope would be to reset/replace the battery, but that would void my warranty. However, although the T-mobile site claims my Google bought phone is under warranty (and I've been paying for it each month), technically, it isn't. Under them or Google (any more). So, I purchased the tools to open the phone, as well as a replacement battery. In the interim, I tried to use all the button combos and various charging connections to get it to come back to life. I *did* manage to get it charging the old battery. I know because the blinking red light turned constant for an hour or two, and the battery got warm. I can only guess that the battery was too damaged to keep the charge however, because I could never get it to turn on during or after. My best guess is that the software battery reset allowed the phone to send a charge to the battery - at least once.
After getting my tools and replacement battery, I managed to get the phone open (with great effort - I think there must be a difference between batches there). I removed the old battery connection and looked to see if I could get the charge icon with it unattached and on the charger. I couldn't. Reconnecting the old battery didn't seem to make any difference.
I was about to go through the process of prying up the old battery when I realized that you can actually connect the new battery to the board connector without getting the old one out. So I did that. Leaving it charging like that for awhile didn't do anything, so I decided to do another software battery reset and I'm letting it sit on the charger overnight. All of this has been without reattaching the back.
So my major question is - does anyone know for sure if the phone actually charges the battery with the back off? I know there are important circuits there - which seem to shut down the phone after the battery or google image when not detected (at least that's my deducement after reading posts). But are those connections also used in charging? The Qi goes though the back to the charger function, so perhaps that connection has to be there? I would like to try and find out though beforehand. It took 2 hours and two mangled guitar picks to get it open the first time, and the second may be just as trying. (And believe me, towards the end, I was not concerned with being gentle.)
I am also curious about the four prong battery connection. I've seen the post about charging the battery using external sources by connecting to the two outer pins. Does that mean the two inner pins constitute a second circuit between the charged battery and the phone? And if I find another 3.8v battery fully charged, I could perhaps connect that to the phone instead by wires and get it booted into recovery? As to why I'd want to do that, I don't recall the last dated CM version I had installed, so finding that in their folder plus pulling off everything from /data... assuming I replaced this with another Nexus 4, I might be able to save myself a lot of setup hassle.
In terms of the red light... it actually seems to be an error code. When triggered, it blinks 7 times, and on the eighth stays lit for a bit before repeating.
Click to expand...
Click to collapse
I RAN INTO A SIMILAR PROBLEM
I found that holding the power button for a while allowed my nexus 4 running stock Lollipop 5.1 to boot back up.
Have considered that you may have a faulty USB port ?
Just pop the old battery out install the new one plug in the charger and it will charge. You can boot up without the back on. The back contains the antennia.... and the NFC circuit board.
Good luck

Blacksmith5 said:
I RAN INTO A SIMILAR PROBLEM
I found that holding the power button for a while allowed my nexus 4 running stock Lollipop 5.1 to boot back up.
Have considered that you may have a faulty USB port ?
Just pop the old battery out install the new one plug in the charger and it will charge. You can boot up without the back on. The back contains the antennia.... and the NFC circuit board.
Good luck
Click to expand...
Click to collapse
Well, still no luck. I ended up putting the new battery in and closing it up to try the Qi charger, but all I can get is either 7 or 10 red blinks followed by a short solid light. No white battery charging symbol or anything else.
When you say a faulty USB port, what are you referring to? The cable works (though I've also tried my Nexus 7 one too) and even though it won't boot, my computer does recognize that something is there when I plug my phone into it (it just can't figure out what's plugged in - which is normal). I want to say that it's trying and failing to charge the new battery. At this point, I think the charger messed up more than just the battery.

[Help] Moto X Play won't show it is charging but the battery is working properly.

So, 2 days ago I was charging my device (XT - 1562 Indian Version 16GB) and when I saw the phone after 2 hours the battery was still at 15%... so I got into the battery options to check if the battery was charging and it was showing "Not charging"(SS attached) so I rebooted my phone and it was still showing not charging, I also did a factory reset and still the problem was not solved so I booted into the fastboot mode and there it was showing that the battery is charging. I was confused so I thought that there may be a firmware problem(6.0), so I downloaded factory images of 6.0.1 and flashed them(the BL was locked) and still the problem was there then I unlocked the BL and flashed 5.1.1 and problem still persists. Guys pls help me. :crying:
Also please tell me how can I flash 6.0.1 again via Fastboot mode. I am still at stock 5.1.1
Edit : Update : Now I have installed a custom ROM (CM 13.1 by Temasek) and now the phone is charging like it should but it charges till 82~85% and then stops charging. Cant give the phone to the service center because I unlocked the BL.

thesaurabh7777 said:
So, 2 days ago I was charging my device (XT - 1562 Indian Version 16GB) and when I saw the phone after 2 hours the battery was still at 15%... so I got into the battery options to check if the battery was charging and it was showing "Not charging"(SS attached) so I rebooted my phone and it was still showing not charging, I also did a factory reset and still the problem was not solved so I booted into the fastboot mode and there it was showing that the battery is charging. I was confused so I thought that there may be a firmware problem(6.0), so I downloaded factory images of 6.0.1 and flashed them(the BL was locked) and still the problem was there then I unlocked the BL and flashed 5.1.1 and problem still persists. Guys pls help me. :crying:
Also please tell me how can I flash 6.0.1 again via Fastboot mode. I am still at stock 5.1.1
Click to expand...
Click to collapse
Maybe fault in hardware.
Automated reply by JARVIS

K.khiladi said:
Maybe fault in hardware.
Automated reply by JARVIS
Click to expand...
Click to collapse
Thanks for the reply bro. I have updated the thread so can you tell me what is the problem.

are you using the original charger and cable ?? charge the Device when it's off then turn onforum.xda-developers.com/showthread.php?t=1782420

I'm having this exact same problem on my xt1575. I bought it from a nice dude on Swappa, but he seemed pretty green concerning phones in general. He rooted/unlocked it, then appears that he kept the stock ROM while flashing the franken kernel. I didn't notice this for the first day or two as I opened it and poked around for some signs of something loose/water damage: nothing.
I couldn't sleep last night, so all morning I've been doing what I can to play around with clearing caches, flashing different ROMs, and anything else I can find in the software side, but aside from somehow getting it to get past the previous cap of 4% to a whopping 25% before slamming down to 11% (percentages waver constantly), I'm stuck and desperate to figure it out. I've even tried the stock turbo charger, the stock charger for an old Moto X 2014, and as of writing this just now a Samsung quick charger for the giggles.
I have parts for all kinds of Moto X 2014/Nexus 6 lying around, so I took the risk of connecting a Moto X 2014 battery up to see how it behaved. It read the battery level around mid-seventies and didn't seem to drop at any exaggerated rate but still kind of bounced around a tad. It would charge at times, but otherwise still wouldn't show the battery as being charged. I didn't think too much of it because the 2014 is of course a different model at a much smaller capacity, so I didn't want to try leaving it on the charger for fear of overcharging. The only thing left that I haven't done is hook up the Play battery to another motorola because I don't have any screens to monitor progress and see how consistently it reads to determine if it's the battery that's somehow gone wonky.
So in summation/where I'm at right now: I'm having this same problem; I've tried both hardware and software tinkering to no avail; I feel this is still somehow kernel/software related, but I'm not sure how to completely obliterate everything to start from stock. Please forgive how scatterbrained I am right now, I'm tired yet wide awake and irritated with the whole situation; there's NOTHING I can find in the forums or elsewhere outside of stock replies like "are you using the original charger?"

My moto x play not change in normal it only charge in factory mode that to 75-82℅ only.

Let it discharge fully then put on charge without booting up

PSxplay said:
Let it discharge fully then put on charge without booting up
Click to expand...
Click to collapse
I have did that still it's not charging, it's showing power symbol without percentage showing.

Shajj99 said:
I have did that still it's not charging, it's showing power symbol without percentage showing.
Click to expand...
Click to collapse
I have tried after battery fully drain, still it's not charging again I am charging mobile in factory mode. Is there any solution please help me. In factory mode i am not getting signal.

So no change in behavior. I did notice that when in TWRP that the CPU Temp value is crazy, and any reporting software says the battery is at -23.8° C and always cold, even on a brand new replacement battery (obviously send like that is what's keeping it from charging). I even went as far as to put a heat gun on it from a distance to artificially actuate any sensors and got nothing. The one time it did report normal temps it charged fine for a whole day but hasn't returned to normal since. This **** is maddening...

I know this is a long shot, but have you tried resetting the battery stats?
http://forum.xda-developers.com/showthread.php?t=1699687

I had this problem but yesterday I can solve that
First I put stock firmware
Wait for fully discharge
And wait full shutdown
I put an moto g 2013 charger (550mA 5V)and led stay on around 5 min but not charge
After put Nokia n86 charger (1A 3.5V)5 min and not charge
After i put an orginal moto turbo charger
And start to charge wait for 9%
Turn on the phone
Clear battery stats with battery calibration app
Wait for full discharge
Wait for full turn off
I put a Nokia n86 charger wait 5 minutes vibrates and start to charge like the beginning

Any other suggestions or solutions? Still my phone only charges in recovery mode. I have a aukey fast charger. Tried different kernels and roms without success.
The solution with the nokia chargers seems really strange and i dont have that type of charger.
Regards

Someone fixed this? I have the same problem and can't solve it. I have cm 13 by temasek and the first time the x play charged up to 83% but after a full discharge and a clean of battery stats, I olny could charge it via factory mode, like in stock 6.0.1

I dont know why but after i opened the phone and disassembled the battery it worked after putting it back together. Disconnected the cable to mainboard as well as nfc antenna. Then carefully pried the battery out. Its slightly glued to the mb. Then I held power button down for a few sec as read in a different forum. Afterwards I connected power cable back but left the battery next to the phone. Booted the phone and charging worked. Than I reassembled the phone Ehen I was sure everything worked. I was about to change the battery but now it works. I flashed different Roms and kernels without any improvment before. After I got it working I flashed a nandroid backup of a resurection Rom image that didnt worked before. Now its running perfect.

pulpokraken said:
I dont know why but after i opened the phone and disassembled the battery it worked after putting it back together. Disconnected the cable to mainboard as well as nfc antenna. Then carefully pried the battery out. Its slightly glued to the mb. Then I held power button down for a few sec as read in a different forum. Afterwards I connected power cable back but left the battery next to the phone. Booted the phone and charging worked. Than I reassembled the phone Ehen I was sure everything worked. I was about to change the battery but now it works. I flashed different Roms and kernels without any improvment before. After I got it working I flashed a nandroid backup of a resurection Rom image that didnt worked before. Now its running perfect.
Click to expand...
Click to collapse
So, may the problem be in the pins when the battery is plugged into the mb? I'll try that! thanks!

Still having this issue, the solution with the chargers didn't work for me, neither the battery solution, suggestions?

How to solve the problem?
Please

Same issue
My Moto X Play has the same issue. It will only charge in Factory Mode. I had this issue before at 10-11 months old and had it 'fixed' under warranty, now 2-3 months later the same issue has occurred. Of course the warranty is only 1 year...
Glad I am not alone in this issue but i wish there was an easy fix! Putting me off getting another Moto...

Same problem occurred with me( Moto X Play).
My phone was not charging, it was stuck in some percentage and was not increasing or neither decreasing while plugged in to charger. But when i put it into recovery mode, it charges. But that was not the solution to the problem.
So, i have tried factory reset.
but problem was not solved.
i googled for the solution, but couldn't find the right solution. And i was stressed (I have a girlfriend, and living in very distance relationship, for me a smartphone is very important).
And was thinking of buying a new phone but not the Motorola, but couldn't afford at the time.
At the same time, i thought of repairing it by myself, by fixing the battery properly.
Without thinking about voiding the warranty and Motorola support, i unbolt every screw of the phone. and finally , finally, finally i made it by removing the battery and fixing it again(charger was plugged while removing the battery and fixing, and phone switched off while removing).
And now my phone is charging properly.
Hope I have helped every person concern to this same problem.
Thank you

0% 0mV with fully charched battery

Hello everybody
Phone: Motorola Moto 4g Athene. Bought in 2016 in the USA in BestBuy. There is no warranty now.
Firmware: I have used LineageOS. At the moment, the bootloader is locked and the firmware is official (see below)
Problem:
The battery indicator shows 0%. The application "Battery callibration" shows 0mV. I culdn't turn it on directly: after "hello moto!" it is turned off. I managed to enter the system only through the recovery. If you disconnect the charging from the phone, it immediately turns off, because it thinks that the battery is critically low. At the same time in the recovery it works as long and stable as need even without charger. The voltage at the ends of the wires of battery measured by the multimeter was 3.9. After the body stood on the charge it became 4.2. Looks like the battery is charging in normal mode. All other functions of the phone seems to work properly. It seems that the phone is OK, but for some reason "does not know" how many volts there are on the clamps of its battery...
Background:
The body is Motorola Moto 4g Athene. It heated a lot all the time after purchase. As a result, the official battery have dead after one year. I bought a new one from the internet. (I am not in the US now. Motorola do not certified here. So there is no official parts, stores and service centers). The new one also died in a couple of months. During the replacement of the third battery, the plug on the board broke off. The wires from the new battery had to soldered directly to the board ... The third battery also died in a couple of months, and I have bought a fourth. Soldered. Here this funny Bug appeared.
Attempts to resolve:
Initially, it was LineageOS 14.1 installed. I did a Wipe of everything except internal data. Nothing changed. Then I rolled back to native firmware with locked recovery. Nothing. I made a Factory reset. Nothing. I have resoldered contacts from the battery wires to the board 5-6 times. Nothing has changed.
There is an idea that I overheated something on the board. Charge controller or something else. Nevertheless I can’t understand why the body works normally, except that it does not understand how many volts there are in the battery?
As a temporary solution, I consider the installation of some kind of software, which would not allow the android to turn off when the battery is low. In this case, I will charge the phone every 15-16 hours and everything will be OK. Do you have any idea about such kind of software?
Any other ideas are welcome.

Galaxy s5 won’t boot up

Please can someone help me with a problem I’m having with my Samsung Galaxy s5.
I put my phone on charge before I went to bed and when I woke up it was still showing a red LED. I knew this was wrong because it should have had enough time to charge and turn green. I had not powered the phone off before putting it on charge and I plugged it into the same USB 3.0 charging lead I have been using for the past six months. I unplugged the phone and pressed the power button to light up the lock screen but it didn’t light up.
I’m thinking possibly something has either shorted or over heated and fried something either on the charging port assembly or one of the chips adjacent to the port while the charger was plugged in. It seems like only a trickle of power is getting through to the phone. When I plug a different USB 2 charging cable into the phone, without trying to power on, the charging icon appears but shows no charge at all in the battery.
I have also tried the spare battery I have but it’s still the same. I know the spare battery is 100% fully charged because I store it in a separate charging/storage box which shows a green LED when it is full. In fact the one which was in the phone at the time is also fully charged according to the charging box. Neither battery has got warm at all inside the phone. I’m confident both batteries are fully charged and totally fine and the problem isn’t with the batteries.
At this point I removed my sim card and also the MicroSD card. I needed the sim to use in my spare phone and I wanted to see if the sd card could be causing the issue but after again trying a normal reboot it made no difference.
I’ve tried several possible things I found on google but nothing has worked. Between each different thing I tried I had to remove the battery for 10 seconds and insert it again to get it out of the boot loop so I could try something else.
Initially when I tried booting into safe mode, then recovery mode and then download mode it brought up the screens for those but in each case after a few seconds the phone powered off and went into a boot loop so I couldn’t attempt any recovery options such as clearing cache etc. Now I cannot even get it to start any of those modes at all and all that happens is the phone does a little vibration, displays the Samsung logo and then just boot loops no matter what I try.
I have tried removing the battery and leaving the phone for a few hours then powering on again but it still just loops.
I have tried pressing and holding Vol-down when plugging it into my PC using a different USB 2 cable and windows acknowledged a phone was plugged in but said it couldn’t connect or recognise the phone and suggested the phone could have a fault.
I don't know if maybe my USB 3.0 lead has a fault that could have caused it or if there could have been some electricity spike while the phone was plugged in, or as I said a component has just fried.
I strongly suspect this is a hardware fault and not a software fault but as I’m not a phone engineer I have no idea about how to trace any possible hardware issues or what might have gone wrong. I would really appreciate any help or suggestions about what the problem might be as this has been a great phone for the last 2 years since I got it and I’d be sad to have to junk it and buy a new one.
Thank you.

I would not junk it yet......
You had mentioned that you go through a lot, just to get phone into Recovery ( " Initially when I tried booting into safe mode, then recovery mode and then download mode it brought up the screens for those but in each case after a few seconds the phone powered off and went into a boot loop so I couldn’t attempt any recovery options such as clearing cache etc. Now I cannot even get it to start any of those modes at all and all that happens is the phone does a little vibration, displays the Samsung logo and then just boot loops no matter what I try." )
OK, just my 2 cents here on this... Why not trying to goto Recovery by pressing and holding the Volume Down (vol-); Home button, and The Power button all at the same time. (yes, if you have a Recovery, and its works, you should be able to boot right into Recovery- >Now, (I would, cause I've been there..) I would also have a PC going with Odin open (Plus the Latest Stock Rom) ... If it works, you would flash the Stock ROM, to clean up anything, giving you all stock, but you can change that of course ...then go from there...
Second, if you can not still get to Recovery.... Have you tried a Stock USB Cable, only asking.... Obliviously something is a miss... with Power... IF phone is off, and you plug it to a power source ... then system has power, and these can power up with just the usb cable, without having the battery in..... Been there. Can add the simple fact, if using just a Micro SD cable, they can bend the Power Board. Believe me (Had to fix the Wife's S5 a few Frinkin' times....) That is why, I say using the Stock Cable, or even a USB 3.0 Cable (like the stock one) does help with power issues when the Micro has bent up the power board...
Will check back and see if this may have you to Recovery or fixed... sure hope this can help you out

Thanks for replying godofsalt.
At the time the phone was plugged in to my USB 3 lead which charges faster and all I can think is that perhaps there could be a fault with the lead or the higher ampage of using this lead caused a circuit to burn out.
I have around a dozen USB 2 leads and I've tried your idea with 3 different ones but none of them will fire up the phone at all with the battery taken out.
I am sure this is going to need some kind of replacement either of the charging port or the motherboard. I don't rate my chances of trying to do it myself and I don't think it will be economic to take it to a shop so I've found a better option by buying the same phone which is second hand but in good condition. That way I know I have all the additional accessories already for probably the same price any shop would charge to fix it.
In future I'll stick to using a decent USB 2 lead on the 1 amp charger I used to use before and hopefully this will not occur again.

G500F battery graphic/boot loop
Had the same problem a few days after installing a 9.0 Rom. My battery is brand new and all cables aren't too aged, so I thought this had to be a physical fault of some kind, but then I had the thought to flash an older bootloader and just like that my battery started taking a charge again and I could boot up. Switched to Flyme os for a while the went back to 9.0 again, with the lastest bootloader and the thing stopped working again. Don't know too much, but I'd try and flash a different bootloader to see if there's any difference. My device failed right at the Galaxy logo, then looped the charging graphic endlessly but would strangely go into download mode and not fail. Don't know if this helps, just thought I'd share my solution.

Thanks for replying henderia93.
My symptoms are very slightly different in that the phone couldn't maintain any of the modes I tried for more than a few seconds before going back to the boot loop again so there was no chance of trying any software fixes including flashing the ROM. Now it won't enter any of those modes at all. I'm certain that's due to only a trickle of power getting through to the main board, not enough to maintain any recovery modes, so there is just enough power for it to attempt to boot, but no more so it just keeps looping, most likely caused by something that has blown while on charge.

MarylinC said:
Thanks for replying henderia93.
My symptoms are very slightly different in that the phone couldn't maintain any of the modes I tried for more than a few seconds before going back to the boot loop again so there was no chance of trying any software fixes including flashing the ROM. Now it won't enter any of those modes at all. I'm certain that's due to only a trickle of power getting through to the main board, not enough to maintain any recovery modes, so there is just enough power for it to attempt to boot, but no more so it just keeps looping, most likely caused by something that has blown while on charge.
Click to expand...
Click to collapse
I ha e taken so many of these a part... Like I may have mentioned, there is a Board, just for the USB (data and power (i still have 2 of them)).... In short, you really have to pretty much take the phone a part. Being very careful with the Screen, and the "Sticky" LEDs and the Home button. There is a lot to it actually.
Like I said, been there done that... Cheap to get, takes some time but it is possible to replace that board. It's a separate board different from the actual main CPU board.
I would have to find it, but I had a manual, for taking these a part.

godofsalt said:
I ha e taken so many of these a part... Like I may have mentioned, there is a Board, just for the USB (data and power (i still have 2 of them)).... In short, you really have to pretty much take the phone a part. Being very careful with the Screen, and the "Sticky" LEDs and the Home button. There is a lot to it actually.
Like I said, been there done that... Cheap to get, takes some time but it is possible to replace that board. It's a separate board different from the actual main CPU board.
I would have to find it, but I had a manual, for taking these a part.
Click to expand...
Click to collapse
While I've been looking for answers about this I've seen teardown videos for the s5 so I can see what the port assembly looks like with it's little PCB behind it. As I have a replacement s5 on it's way all I need to decide now is whether to keep the old handset for spare parts or see if I can follow the teardown video to try and install a new port assembly to get the phone working again as a spare.

MarylinC said:
While I've been looking for answers about this I've seen teardown videos for the s5 so I can see what the port assembly looks like with it's little PCB behind it. As I have a replacement s5 on it's way all I need to decide now is whether to keep the old handset for spare parts or see if I can follow the teardown video to try and install a new port assembly to get the phone working again as a spare.
Click to expand...
Click to collapse
Yep, me too, seen many vids on the tear down. I decided to go a bit more, IMHO, to have an actual manual, PDF, when I did my first one, many years ago. So, can read, and use photos wisely. Seen too many Utube crap, where the break it, destroy it..... crazy!
Well, at this age, not too sure what to do my self. In our case, our present service is cheaper to Keep these. Grandfathered in, and we pay a but less, than going to any other carrier. Plus, these newer phones are not cheap at all.
True, it up to you. hope all goes well.

Sorry I am a novice so please excuse my question.
Are you assuming that the usb port is shorting even when no usb cable is inserted? As you put a fully charged battery in with no change it would seem that the act of charging is not involved.
Have you tried a voltmeter to check the voltage at the battery charging pins?
Have you tried to check the voltage at the two pins commonly used for a wireless charging adapter (to the upper left of the battery) to see what the voltage is?
Sorry if I am off base.

Mi 9t - Phone won't boot (or battery won't charge)

Hi all,
Bit of an issue with my phone: photos.app.goo.gl/D1ybZrWc7B9WyaALA
In a nutshell:
- Phone's stock as a rock (no rom, no root, etc.)
- Phone was charging okay
- Tried a number of different usb c cords, power bricks, etc.
- Vol up/down + power doesn't work.
Thoughts? Thoughts on next steps?

tmumf said:
Hi all,
Bit of an issue with my phone: photos.app.goo.gl/D1ybZrWc7B9WyaALA
In a nutshell:
- Phone's stock as a rock (no rom, no root, etc.)
- Phone was charging okay
- Tried a number of different usb c cords, power bricks, etc.
- Vol up/down + power doesn't work.
Thoughts? Thoughts on next steps?
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An update - after a few mi logo/empty battery logo cycles (see vid), the phone died altogether. I did notice; however, that when plugged in, the red light (as part of the popup camera) is flashing slowly. Does this signify something?

Try different cable, charger. If not, then it is probably hardware problem with motherboard or battery - battery could be drained too much. It's on warranty, so dont wait, just let em fix it for you

yeah, tried different chargers, cables, etc. No dice.
I would go warranty through supplier; however, its 'tobydealsau', and they charge ~80AUD for a warranty inspection (i.e. no promises), and it takes 4-6 weeks.
I read some stuff about EDL mode - could this fix it?

What? Deliver it to one of service centers near your location:
[URL="https://www.mi.com/global/service/support/warranty/au.html]here[/URL]