Mi 9 SE defect USB Port? - Xiaomi Mi 9 SE Questions & Answers

Hello guys,
maybe somebody can help me with my strange problem...
Since a few days, my phone doesnt get recognized via USB anymore.
I tried the following things to get it to work:
Change multiple cables, USB Ports and Computers
Reinstalled the last update to ensure i didnt corrupt the OS
Cleaned the Port on the Phone carefully
Used USB-Debugging
Change Standard Mode for USB to MTP
The phone doesnt get recogniced even by task manager, so installing other or new drivers is no option.
It doesnt matter if I am in OS, Recovery or Bootloader, there is absolutely no reaction by the phone or the PC.
The strange thing is, that the phone is charging normally and even my usb-c to 3.5mm Adapter is working fine.
Somebody an idea what I could try to do now?? (I already searched for replacement ports, but i couldnt find an affordable one to try)

Mine is charging really slow since two weeks. I dont know if this is due to a software bug or a hardware problem. So, maybe your problem is a software bug - due to the fact that your phone is charging with normal speed.

If this is the case, how can i flash the previous version without a data connection? Because downgrading is not supported by the MIUI updater anymore.

Have you tried to reverse the usb-c plug. I have seen strange things happen when reversing the plug. In one direction it is impossible to get a connection to the computer - in the other direction it worked.

piaggiorider said:
Have you tried to reverse the usb-c plug. I have seen strange things happen when reversing the plug. In one direction it is impossible to get a connection to the computer - in the other direction it worked.
Click to expand...
Click to collapse
Yeah already tried that while testing different cables and USB Ports.

Mine started to charge slowly and usb connection stopped working. Are you sure that QuickCharge still works for you?
I sent the device to repair center. The board with USB port has been replaced and everything is fine now.
Wysłane z mojego Mi 9 SE przy użyciu Tapatalka

Related

[Q] USB Keeps being plugged in and out

Hello,
When plugging my HTC One M8 into my laptop, about every 30 seconds there is the sound of a USB being plugged out and then plugged back in, and then the typical windows 8 "what do you want to do with this device" notification. I dont think its a laptop problem because my USB memory sticks etc work completely fine. I've tried with all the USB ports, both 2.0 and 3.0.
Any ideas as to what to do to troubleshoot?
Thank you.
xT4Z1N4TRx said:
Hello,
When plugging my HTC One M8 into my laptop, about every 30 seconds there is the sound of a USB being plugged out and then plugged back in, and then the typical windows 8 "what do you want to do with this device" notification. I dont think its a laptop problem because my USB memory sticks etc work completely fine. I've tried with all the USB ports, both 2.0 and 3.0.
Any ideas as to what to do to troubleshoot?
Thank you.
Click to expand...
Click to collapse
Try a different cable.
xunholyx said:
Try a different cable.
Click to expand...
Click to collapse
I have tried with the cable that came with the M8, and also the cable that came with my old Desire Z
1. Uninstall the drivers for HTC m8 from device manager , accept to delete all drivers and restart you laptop. After restart reconnect your phone and fresh install your phone. Use your original cable.
Sounds like bad cable, bad USB port on pc, or port on device is damaged. Rule out the first 2 first. Try another pc too. If not, probably your device port unfortunately.
I've seen a couple other reports of this happening on Win 8 (8.1 specifically?); and bad port or cable did not seem to be the cause. Don't know if a solution was ever found.
I've had this problem with some cables. An old Treo Pro cable I have does this, as well as a generic 3rd party cable too. The genuine HTC cable works fine as does a 3rd party flat cable I have. I always forget about it and spend 2 hours trying to figure out why the blasted thing kept disconnecting, then I remember and use my trusty OEM cable and all is well...

What is broken and can it be fixed at home?

Hi all!
My computers USB port was broken and it let all the electric through (don't know how to write these thing in english)
I connect my phone to the USB and don't know that.. then my phone only charge through computers usb and pc doesn't even try to recognize it.
Then i connected my microsd cardreader to same usb and i heard "puff" and smelld burning electric.
Phone does not smell like burned or anything. Working just fine.. it only doesn't work with data transfer.
So.. is it possible to fix by myself? like changing the usb dock https://ae01.alicdn.com/kf/HTB1xvUoMVXXXXaoaXXXq6xXFXXXf/5PCS-For-Xiaomi-Mi-Max-Hexa-Core-6-44-Smartphone-USB-Charging-Port-Dock-Connector-Transfer.jpg
Or is my phone bricked forever and i cant use it through usb cable?
i hope that you all understand my problem, it's hard to write these thing different language
Anyone?
Replacing the usb dock piece will probably fix your problem and isnt very hard to replace and isnt very expensive from aliexpress. I cant post links but if you go to youtube and search "mi max disassembly" it will show you how to take apart the phone and get to the piece. i have taken myn apart before and it isnt very hard at all. Hope this helps
Sorry, it's not clear to me. Is there a problem with the USB port on your phone? Or only a problem with the USB port on your computer?
You may want to try a different USB cable. Sometimes the microUSB adapters can get worn out.
Problem is on the phone. Phone only charge from usb. Settings are ok.
Same usb port broke my Canon also. It has warranty and its fixed now. It was same way broken than my phone.
Computers usb is fixed now.

usb problems

im having a problem connecting my pixel 2 xl to my desktop pc via usb c
here are some things
when i connect phone to usb-c port nothing happnes. no charging, no usb options notification
old phone, nexus 6p, uses same port and cable and works just fine
pixel 2 xl will connect to usb-c port on my laptop just fine
will connect to usb-a port with an a-c cable just fine
if i boot in to safe mode the desktop will recognize but it takes 5 minutes or so of being plugged in
windows 10 and usb drivers are up to date
any ideas??
thanks guys
First thing to try would be another cable and/or another USB-C port.
On the first Pixel XL, after Oreo came out, it very picky about these. It took me many tries of three cables and two USB-C ports until the images would flash properly. Two of the cables were straight from Google, and the third one was certified as a good cable. They all worked fine for everything on Nougat.
I realize that you're only trying to connect it but those are always the first things to try.
I did try other cables. Both work on my 6p that has Oreo. I only have one usb-c port on my desktop unless I buy an expansion card and I'd rather not. I did try my laptops usb-c port and that works
The default option when plugging phone into USB on a laptop or PC is charging. You can see this from notification area.
Select this and change it to File Transfer. Then you should be able to see it connected.
I'm not getting the USB options notification unfortunately
knock.back said:
I'm not getting the USB options notification unfortunately
Click to expand...
Click to collapse
Do you have USB debugging enabled?
If so, then when you first plug it into the PC, you should be prompted on the phone to allow the PC/Device to connect to your phone. Allow it always.
USB debugging is not turned on
knock.back said:
USB debugging is not turned on
Click to expand...
Click to collapse
Turn it on.
knock.back said:
USB debugging is not turned on
Click to expand...
Click to collapse
That is your issue, you need to turn on USB Debugging to enable communications between the Laptop/PC and Phone. Once enabled, and you connect them. Drop the notification window and select File Transfer.
Have you tried toggling PTP and MTP? That is how I got my Nexus 6P tp bre seen as storage (adb worked fine).
I didn't have this problem with my Pixel 2 XL using the same cable and port.
I don't know if this will have any effect but on the pc, plug to the usb ports on the back that are direct to the motherboard instead of usb headers on the top/front of pc.
I have this issue with a TomTom satnav and a Mio miview dash cam. Unless they are plugged in on back pc / with Windows 10 doesn't recognize
Sent from my XT1572 using Tapatalk
I have been having USB data transfer problems as well.
My Pixel 2 XL sometimes chokes on files when transferring from MacOS with Android File Transfer. I have tried different cables, different computer ports, different computers. I have tried USB debugging and Safe Mode. I have even tried factory reset. Sometimes it chokes on the same files, sometimes it is different files. Yet my Pixel XL handles those same files without any problem with the same cables and computers.
Data transfer stops completely. Sometimes a reboot of the phone is required. Sometimes a reboot of the phone and computer. And sometimes even a factory reset doesn't clear the problem -- it has unable to detect any other connected phone to transfer files during setup.
I was only able to bypass this file transfer problem by sending the files as a zip.
I have contacted Pixel 2 Support about this. They seem very puzzled. They said that I should be hearing back from an "upper level", but that was 5 days ago now.
knock.back said:
im having a problem connecting my pixel 2 xl to my desktop pc via usb c
here are some things
when i connect phone to usb-c port nothing happnes. no charging, no usb options notification
old phone, nexus 6p, uses same port and cable and works just fine
pixel 2 xl will connect to usb-c port on my laptop just fine
will connect to usb-a port with an a-c cable just fine
if i boot in to safe mode the desktop will recognize but it takes 5 minutes or so of being plugged in
windows 10 and usb drivers are up to date
any ideas??
thanks guys
Click to expand...
Click to collapse
Same here man, contacted google this morning and support said this was how it was with his brother's phone as well. Had no suggestions.
EDIT: This is with USB Debug on or off, no options to charge or select anything, takes about 5 minutes and then starts working as normal. Unfortunately, the fingerprint scanner stopped working as well. Getting a new one sent out, I'll follow up and let you know if it has the same behavior.
EDIT: 11/6/17 - Got new phone in. Fingerprint issue is resolved but the same USBC issue is not. Phone does charge from it when off.
I've got a very similar problem here with Pixel 2 XL manufacture date October 10th. After some extensive troubleshooting, I'm certain this is a hardware issue.
When connecting USB-C to USB-C with my laptop, the phone will start charging but will not register that it is connected to a computer unless USB debugging is enabled. Even then, with debugging enabled I will usually, but not always get the option to switch from charging mode to MTP/file transfer mode, but when I try to switch the phone will just disconnect and reconnect several times and revert back to charging mode. It has only every actually established a data transfer connection 3 times out of probably near 50 attempts over the past week.
I have tried two different type-C to type-C cables, doesn't make a difference.
I had the pixel 1, and had no issues at all with the same connection and with either cable, so I can safely rule out the cables or the laptop as the problem.
The issue was present with 8.0 firmware and is still present with 8.1 beta.
I did try booting into safe-mode, and the problem was still present.
I did a full factory reset, and the problem still persists.
This issue is specific for type-C to type-C, when I use a USB-C to USB-A cable, the phone will immediately recognize a data connection and allow me to switch from charging mode to MTP/File transfer mode, regardless of whether USB debugging is enabled or not. Though the phone does occasionally hiccup and disconnect/reconnect itself so it may take a second or third attempt at switching to MTP mode, but then it will establish a steady connection where I can access the phone's data.
I just got off the phone with google support, the rep mentioned he has heard of a few instances of a similar issue, and since I've already exhausted all possible troubleshooting they would have recommended, they are sending me a replacement.
I've been a loyal google customer since the Nexus 6P. It's a shame the LG's quality control was so shoddy with this product, now I have to wait and see if the replacement doesn't have the same issue or if it ends up having worse blue screen shift than the phone I am replacing.
At least I can say that google's customer support is on point, kudos to them for trying to make this right.
Alright well I may try this. IDK if it's worth an RMA tho, my a to c cable works fine, I just more or less can't charge off of it because it's too slow
knock.back said:
Alright well I may try this. IDK if it's worth an RMA tho, my a to c cable works fine, I just more or less can't charge off of it because it's too slow
Click to expand...
Click to collapse
Might not be worth RMA to you, but considering that it's a brand new $1,000 device (XL 128GB) I'd want to make sure I had one that doesn't that doesn't come with (more) problems out the gate... and since type C is the new standard, eventually replacing type A, and google is promising 3 years of updates, I'd like to ensure mine is future proofed as I intend to keep mine for a while.
I have the same issue and apparently so do lots of others. Did all the norm right off the bat, usb debugging on, tried every usb port, toggled PTP, MTP, etc. (currently left on MTP). An option pops up to choose either "transfer files" or "charging". It will never leave "charging" mode. The radio button will not select transfer files. Super annoying that a 1k phone has ridiculous hiccups for such basic hardware components.
Has anyone fixed this issue? I have the exact same one. My OG Pixel on Oreo worked fine on my motherboards USB c port. The Pixel 2 does not work at all. I can use any USB a port and it works... This is funky
Sent from my Pixel 2 using Tapatalk
stevemw said:
Have you tried toggling PTP and MTP? That is how I got my Nexus 6P tp bre seen as storage (adb worked fine).
I didn't have this problem with my Pixel 2 XL using the same cable and port.
Click to expand...
Click to collapse
I can get my comp to see my XL 2 but I can't get adb to work. Any ideas?
jerflash said:
Has anyone fixed this issue? I have the exact same one. My OG Pixel on Oreo worked fine on my motherboards USB c port. The Pixel 2 does not work at all. I can use any USB a port and it works... This is funky
Sent from my Pixel 2 using Tapatalk
Click to expand...
Click to collapse
I haven't found any fix yet.
Stuck with the super slow A to C cable

Lost usb connection and quick charge after rom update

Hi guys,
I had a xiaomi.eu beta rom installed from feb/18 and i decided do update to the last beta available 8.4.28 through twrp. After that i lost quick charge and my usb connection. My pc (or any) dont recognize my phone, when i plug the usb into my pc nothing happens, nothing new in the device manager. I tried different cables and charges. Cleaned my phone usb type c port with isoprophyl alcohol and a electronic contact cleaner, didnt fix. I decided to do a full wipe, installing a Global stable 9.5.2 do see if it would fix my problem, but it didnt workout. After that i foundout thay i lost my twrp and a generic recorery from xiaomi was instaled. Yesterday i got a update via OTA to 9.5.4, didnt fix it. Now i have a phone with slow charge, no usb connection, no twrp, no root. My only solution now is to find an APk that root my phone so i can install twrp using flashify and try the rom from february i was usong before all of this. Does anyone have/had this issue?
Does this also happen when connecting with other computers?
Yes, i tested with my laptop and my computer at work. Also, my otg doesnt work. I can reboot to Fastboot mode, but i my pc doesnt regognize this way too.
i have the same problem. currently i am on V9.6.1.0.NAGCNFD. and i lost my USB connection to my pc. as well on all QC chargers i have, i cannot charge my device any more. it starts to charge for 2-3 seconds and then stops charging. slow charging via regular usb ports/chargers is the only function left on the built in usb-c port.
i tried various pc's, cables & chargers.
rainersc said:
i have the same problem. currently i am on V9.6.1.0.NAGCNFD. and i lost my USB connection to my pc. as well on all QC chargers i have, i cannot charge my device any more. it starts to charge for 2-3 seconds and then stops charging. slow charging via regular usb ports/chargers is the only function left on the built in usb-c port.
i tried various pc's, cables & chargers.
Click to expand...
Click to collapse
I fixed it on my mi5s. it was actually a hardware problem . after changing the lower board containing the USB-C connector inside of my phone, it all is working again.
the board is available for a couple of USD on aliexpress.
Just wondering - did you manage to fix this problem? I have the same issue - but AliExpress USB-C module replacement didn` help.
Mine is working fine since i replaced that module.

Is it possible to charge my Note 4 whilst also accessing USB via an OTG cable?

I have a USB OTG cable that I can use to connect USB devices like flash drives, keyboard etc. and that works fine, but for some reason my phone won't charge whilst the OTG cable is plugged in.
Am I missing some really obvious way of getting this to work? Is it software based? I'm rooted and running Lineage OS if that makes any difference. I've tried several different OTG cables, I've tried connecting to different power supplies, different USB cables, different outlets, I've tried going into developer debug settings - nothing seems to get it to charge and data at the same time.
I am also interested in the topic. Trying to run Octoprint for Android and charge at the same time. I bought an OTG Y cable and the problem is that the phone is either charging or communicating with the 3d printer. Never both at the same time. I've researched quite a bit on google and it turns out at least on some devices the required effect can be achieved but I haven't been able to find anything about huawei devices. It is most probably a software limitation.
The same problem but i have Samsung J5 2017, i have rooted device so there is option to modify system files
Gosh! Would love to get this working. Any news?

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