Develop Bugs

UNIVERSAL in Boatloader mode not recognized by PC-USB

I tried to upgrade my rom but the process crashed. The utility mtty doesn't work because when I connect the universal, boatloader mode by the cable, to the pc, it says "USB not recognized" (sometimes when I connect the computer is frozen till I disconnect the cable of the universal)
Please, I tried to have some solutions in the forum but all the posts indicates is needed previously the usb connection.
Do you know if should be possible to run the flash of the rom in other way, for example using a serial cable connected into the miniusb of the universal, because the boatloader screen says "Serie, v.1.01"
I apprecite what you can say please, I'm really in a hole.

Try this...
Try taking out the battery for a few minutes (10-30mins) and reboot your PC then repeat upgrade process. Hope that helps. Good luck!!!

I have the same problem on my PC at work, it's caused by a poor USB chipset in the PC, or trying to connect through a USB hub.
The only thing I found that worked was to try a different PC, then it was fine...

sl9 said:
I have the same problem on my PC at work, it's caused by a poor USB chipset in the PC, or trying to connect through a USB hub.
The only thing I found that worked was to try a different PC, then it was fine...
Click to expand...
Click to collapse
In my case it still happening in other computers. Conclussion: some piece of the software in the universal has been lost. The screen shows "Serial" that means on some way that is opened to comunication but not USB.
My questions are:
- should be possible to put some starting software in SD and do the universal boot on it.
- do you know how to connect to the computer COM! port from the usb miniport of the Universal.
I appreciate, I was not planning to replace now the Universal...

beginner said:
sl9 said:
I have the same problem on my PC at work, it's caused by a poor USB chipset in the PC, or trying to connect through a USB hub.
Now works.... I still thinking windows is so stupid software made for distroy our mind ....
Solved after install drivers for a converter usb -rs232 ( I was looking for the way to connect from rs232 the universal)
I'm happy again and I promise don't try to change rom again (at least for a while)
If some person is interested in what brand of software/hardware I installed, send me a mail...
Thanks hearing me ...
Click to expand...
Click to collapse
Click to expand...
Click to collapse

i have the same problem with my friend's uni
does it mean that you don't have to own any adapter, just have to install drivers for USB to RS232 adapter
if yes, where to find it?
thanx
respectfully
ZeD

zedino said:
i have the same problem with my friend's uni
does it mean that you don't have to own any adapter, just have to install drivers for USB to RS232 adapter
if yes, where to find it?
thanx
respectfully
ZeD
Click to expand...
Click to collapse
I want to say that is running after doing some things and obviously some of it solved my problems. I made:
- unistall last version of activesync and go back to version 4.0
- delete all the applications using ports usb.
due the connection still not running (windows message: device not recognized) and because in the screen of universal I saw: "COMM1" I tried to connect from computer port rs232. By that I purchased some special cable, name: hama brand, rs232 serial, 9 pin - usb.
As you can imagine all the steps I followed were followed by the typical restart of windows. In this sense is important to say that the universal, after connect, need to do a soft reset each time (again windows....)
Other comment is that I unmark the option to connect by usb in activesync and mark the connection by com1.
and after all was done, connecting by usb the unniversal, kill wcescomm, windows said "NEw usb device, sync device". I started mtty and now appears the USB option, great! same time the screen in universal changed from comm1 to usb, more great....
and that's all.

does it mean you solve your problem using special USB 2 RS232 connector?
ZeD
PS: it was my first idea , but i still believe i can solve the problem using USB port

zedino said:
does it mean you solve your problem using special USB 2 RS232 connector?
ZeD
PS: it was my first idea , but i still believe i can solve the problem using USB port
Click to expand...
Click to collapse
I think my english wording was not fine. I mean I solved my problem after install the sofware -drivers- of the rs232 connector, but connecting to the universal by usb as on standard way I was syncronizing previous the crack with activesync.

OK, where to get this driver?
thanx

?????????? NOTHING ?????????????

zedino said:
OK, where to get this driver?
thanx
Click to expand...
Click to collapse
Try here.
http://www.hama.de/portal/type*3/action*1026/searchMode*1/q*039703

I have had the same problem several times now (search the forum for the thread).
I tried three different PC's/laptops and three different USB cables all with the same error as yourself.
Eventually I got a connection but the laborious process of trying - failing, restarting windows and soft resetting the phone, trying - failing........... until it finally worked. I did nothing differently the time that it worked but the strange thing is that it has worked every time since! Maybe the USB driver the phone has a bug in it that causes it to get 'stuck' in a mode where it will no longer correctly operate but once you have managed to 'kick' it into action it seems toi then carry on working.
It was also a ROM upgrade that caused my USB phone driver to stop functioning. Maybe the fact that the phone has a slightly diffferent software configuration after the upgrade but exactly the same hardware fingerprint causes the driver to fail.
Every time that I have had this problem it is after an upgrade but once I have gotten it to work once with the new ROM, it always continues to function - until the next upgrade.

shrubbery said:
I have had the same problem several times now (search the forum for the thread).
I tried three different PC's/laptops and three different USB cables all with the same error as yourself.
Eventually I got a connection but the laborious process of trying - failing, restarting windows and soft resetting the phone, trying - failing........... until it finally worked. I did nothing differently the time that it worked but the strange thing is that it has worked every time since! Maybe the USB driver the phone has a bug in it that causes it to get 'stuck' in a mode where it will no longer correctly operate but once you have managed to 'kick' it into action it seems toi then carry on working.
It was also a ROM upgrade that caused my USB phone driver to stop functioning. Maybe the fact that the phone has a slightly diffferent software configuration after the upgrade but exactly the same hardware fingerprint causes the driver to fail.
Every time that I have had this problem it is after an upgrade but once I have gotten it to work once with the new ROM, it always continues to function - until the next upgrade.
Click to expand...
Click to collapse
not works, probably is this device lost forever, i have restarted device and PC almost hundred times, still the same result, uni stuck in Bootloader screen top of page "Serial" bottom of page "v1.00"
nothing changed, even if i connect to USB port
if someone have some solution to this s*it pls let me know
thanx

i have had the same. my device wast recognized by my pc, bur i used maupgradeno_id and installed a other rom, even installed the original rom from qtek (latest) then after i was finished it started then i tried the other rom and it was working. ( pc did see a unknown device ) hope you have the same and its working also.
good luck

mrijnvis said:
i have had the same. my device wast recognized by my pc, bur i used maupgradeno_id and installed a other rom, even installed the original rom from qtek (latest) then after i was finished it started then i tried the other rom and it was working. ( pc did see a unknown device ) hope you have the same and its working also.
good luck
Click to expand...
Click to collapse
no, my problem persist, hundred times i tried to recover friends device using upgrade by original shipped ROM but the device is not recognized by system so there is allways connection error, so this kind of reliving this UNI is not usable
anyway, thanx for raply and suggestion
ZeD

mrijnvis said:
i have had the same. my device wast recognized by my pc, bur i used maupgradeno_id and installed a other rom, even installed the original rom from qtek (latest) then after i was finished it started then i tried the other rom and it was working. ( pc did see a unknown device ) hope you have the same and its working also.
good luck
Click to expand...
Click to collapse
If you're stuck in bootloader mode only, visit www.buzzdev.netand look for ExitBootloader utility written by the great Buzz. Just follow his instructions or scroll thru' Universal's forum here and there for problems relating to "stuck in bootloader"
hope this helps

no device is not recognized by PC so any trying to use exitbl is not available, anyway this option was one of the first what i have tried
thanx anyway
ZeD

i had the same problem with the QTEK of my principal after I upgraded his ROMs.
(after the hard reset, the pocket remained in bootloader mode).
you can solve this problem in a very simple way:
you have to launch the bootloader installation (BL1.01_RUU_UNI_V.1.2.EXE) from the PC (still connected with the PPC through USB) while the PPC is in bootloader mode (on your display you see "USB > Serial 1.01" or something like that).
then you do a SOFT reset and the pocket boot normally.
very simple.
i hope to be helpful to someone.

zedino said:
no device is not recognized by PC so any trying to use exitbl is not available, anyway this option was one of the first what i have tried
thanx anyway
ZeD
Click to expand...
Click to collapse
I had some problem. After uninstall all usb applications in the pc and install the software for cable usb -rs 232, doing some softreset in the pda connected, it turned the screen message "Com" by "Usb"

USB Device Not Recognised on Bootloader

I have a problem. My Exec is stuck on the bootloader screen. All I see is Serial at the top, and v1.00 at the bottom.
When I connect my exec via USB, the screen continues to say Serial (rather than switching to USB) and the PC I connect to 'installs' the device as 'unknown device' in device manager.
I've seen mention of the problem elsewhere on the site, but the only solution I can find seems to be to keep trying, and eventually it's recognised. So far, after three days of trying, it has not been recognised.
I am aware of Buzz tool to get the device out of bootloader mode, but that required a connection to be established, which at the moment, I can't do.
Has anyone got any experience of this, or any ideas as to what's causing this, or how this can be fixed? I have tried uninstalling the 'unknown device' from device manger, restarting the PC (and hard reset of the Exec) then reconnecting, but the same thing happens every time.
Any ideas would be appreciated, as I'm currently staring at a rather expensive paper weight.

Try this it shld work
hdubli said:
This is based on my experience with two UNis..one Exec and other JASJAR..both had same problem...this is how I solved :
-Put yr device in bootloader Mode
-Disable USB in Active Sync
-Now connect woth USB cable and open mtty utility
-Select the "WESUSB... " port
-You shall see a blank white screen..press Enter to get "USB>"
-Then type ( as BUzz has informed) set 14 0
(here I wud like to inform that after doing the above I did not get success so I typed set 14 10,then set 14 9 for two three times)
-Then I ran the ROM Upgrade directly(After enbabling the USB)
-I then followed the procedure as informed on the COngratulations Screen that is hold the two "-" buttons and soft reset and then pressed 0
-I got them back to normal..
I hope this helps to all my friends...Pls feel free..pls do not trouble our Buzz..he might be busy in inventing something more to our devices
Click to expand...
Click to collapse

Guru Meditation said:
I have a problem. My Exec is stuck on the bootloader screen. All I see is Serial at the top, and v1.00 at the bottom.
When I connect my exec via USB, the screen continues to say Serial (rather than switching to USB) and the PC I connect to 'installs' the device as 'unknown device' in device manager.
I've seen mention of the problem elsewhere on the site, but the only solution I can find seems to be to keep trying, and eventually it's recognised. So far, after three days of trying, it has not been recognised.
I am aware of Buzz tool to get the device out of bootloader mode, but that required a connection to be established, which at the moment, I can't do.
Has anyone got any experience of this, or any ideas as to what's causing this, or how this can be fixed? I have tried uninstalling the 'unknown device' from device manger, restarting the PC (and hard reset of the Exec) then reconnecting, but the same thing happens every time.
Just noticed your user name, I was a big Amiga fan a few years back, still fire up Amiga forever occasionally on my PC when I feel the need.
Any ideas would be appreciated, as I'm currently staring at a rather expensive paper weight.
Click to expand...
Click to collapse
Try it with a different USB cable or in a different USB port (don't go through a hub and if you've been using a laptop then try it on a desktop PC since some laptops have hubs built into them). If that doesn't work then you're out of luck as your Universal isn't detecting that you've connected to your PC and its time to send it in for repair.

Thanks Niketkumar - unfortunately it's the step before your suggestion kicks in thats the problem - the device won't connect to the PC, so when using mtty WESUSB..... isn't an option, only COM1 and COM2.
Shuflie, I've tried with three separate USB cables on a laptop and desktop (neither through a hub, and the same device has worked fine on both laptop and desktop before).
I fear a trip to the doctors is in order ...
Very frustrating because the PC sees a device, but installs it as unknown device. Anyone know if theres a Windows CE device driver that I could try and install as an overide (i.e. in device manager on the PC go to update driver and browse to a WinCE.inf or equivalent?)
Failing this, has anyone got any clue what needs to be fixed? Or how much it might cost?

i am stuck on the same problem and wondering the forum for almost 3 days now with no luck.... please help my device is in boot loader mood but not turning the serial to USB ......... please HELP.......

solution
Guru Meditation said:
Thanks Niketkumar - unfortunately it's the step before your suggestion kicks in thats the problem - the device won't connect to the PC, so when using mtty WESUSB..... isn't an option, only COM1 and COM2.
Shuflie, I've tried with three separate USB cables on a laptop and desktop (neither through a hub, and the same device has worked fine on both laptop and desktop before).
I fear a trip to the doctors is in order ...
Very frustrating because the PC sees a device, but installs it as unknown device. Anyone know if theres a Windows CE device driver that I could try and install as an overide (i.e. in device manager on the PC go to update driver and browse to a WinCE.inf or equivalent?)
Failing this, has anyone got any clue what needs to be fixed? Or how much it might cost?
Click to expand...
Click to collapse
Please follow the steps:
1. Plug in ur usb cable in bootloader mode while it is showing 'serial' and version 'x.xx'.
2. Soft reset by pressing Backlight+power+reset pin WHILE KEEPING THE USB CABLE CONNECTED
3. your phone will now reboot into 'usb' mode. Don't remove the usb cable yet.
4. Remove the Memory card while keeping the usb cable still connected and VOILA,your pc starts recognising your phone as Microsoft usb sync.
5. Do whatever you want to do now (upgrade)
Hope it solves the problem now.
Press thanks if it does.

Something else to try
Having had a few issues with my G3 Uni, I've been through my fare share of Uni bootloader issues. When I find that I can't get the 'serial' to go to 'USB', I normally find it's because I haven't taken the memory card or the SIM card out (usually the memory card).
Make sure your memory card is out, then try to enter the bootloader and see if this cures it. If it does, then use mtty and the command 'set 14 0'
This tells it to reboot on reset. if you were to use 'set 14 1' it would go back to the bootloader on reset.

my Htc hd2 t-mobile won't recognize usb on boot-loader mode
hey guys i have a big problem!!!! my Htc hd2 t-mobile won't recognize usb on boot-loader mode. Here is the story my phone was running android 2.3.7 cyanogen 7 but i wanted to update it to ics android 4.0.4, So to do that i restarted my phone while holding down the down volume button and the boot-loader with the three colors came-on saying serial but when i connect my usb cable it won't show usb. even when i tried to run the dft.exe it shows an error saying usb connection failed. BY the way it lets me access the sd card using the usb cable on my pc, so i don't know what the problem is. PLEAS HEALP i am begging u guys pleas!!!!!!!!!!!!!!

kaleb2954 said:
hey guys i have a big problem!!!! my Htc hd2 t-mobile won't recognize usb on boot-loader mode. Here is the story my phone was running android 2.3.7 cyanogen 7 but i wanted to update it to ics android 4.0.4, So to do that i restarted my phone while holding down the down volume button and the boot-loader with the three colors came-on saying serial but when i connect my usb cable it won't show usb. even when i tried to run the dft.exe it shows an error saying usb connection failed. BY the way it lets me access the sd card using the usb cable on my pc, so i don't know what the problem is. PLEAS HEALP i am begging u guys pleas!!!!!!!!!!!!!!
Click to expand...
Click to collapse
you have the wrong forum friends! This Htc Universal section
to update Android on HTC HD2, you can use the Clock Work Mod Recovery !! for more details should refer to this thread http://forum.xda-developers.com/showthread.php?t=1021837

I-MATE JASJAR hung
Guru Meditation said:
Thanks Niketkumar - unfortunately it's the step before your suggestion kicks in thats the problem - the device won't connect to the PC, so when using mtty WESUSB..... isn't an option, only COM1 and COM2.
Shuflie, I've tried with three separate USB cables on a laptop and desktop (neither through a hub, and the same device has worked fine on both laptop and desktop before).
I fear a trip to the doctors is in order ...
Very frustrating because the PC sees a device, but installs it as unknown device. Anyone know if theres a Windows CE device driver that I could try and install as an overide (i.e. in device manager on the PC go to update driver and browse to a WinCE.inf or equivalent?)
Failing this, has anyone got any clue what needs to be fixed? Or how much it might cost?
Click to expand...
Click to collapse
Hi every one,
i have a serious problem with my HTC I-MATE JASJAR what's blocked in white screen (Serial / USB) and i cannot do anything on it, no boot, no reset soft, no reset Hard, no upgrade.
The issue is related to:
I tried to upgrade Radio ROM from 1.09.00 to 1.12 and i'm using Windows 7 Pro and when starting Flash, my PC shutdown because an electrical issue and since that, i cannot boot my device, i cannot flash or reset, my device is hung on white screen with Serial when no USB cable bluged in the PC and USB when Cable is pluged.
I Tried many times to boot it but no response, it's still hung and nothing can move on it.
I Just have one detail: when i plug the USB cable in my PC, the device is reconised but when starting upgrade or flash, i have error 101, no connexion.
Plz someone help me

bechir2013 said:
Hi every one,
i have a serious problem with my HTC I-MATE JASJAR what's blocked in white screen (Serial / USB) and i cannot do anything on it, no boot, no reset soft, no reset Hard, no upgrade.
The issue is related to:
I tried to upgrade Radio ROM from 1.09.00 to 1.12 and i'm using Windows 7 Pro and when starting Flash, my PC shutdown because an electrical issue and since that, i cannot boot my device, i cannot flash or reset, my device is hung on white screen with Serial when no USB cable bluged in the PC and USB when Cable is pluged.
I Tried many times to boot it but no response, it's still hung and nothing can move on it.
I Just have one detail: when i plug the USB cable in my PC, the device is reconised but when starting upgrade or flash, i have error 101, no connexion.
Plz someone help me
Click to expand...
Click to collapse
look here
http://forum.xda-developers.com/showpost.php?p=5456317&postcount=6
the first point...

A lot easier than to root this device

brick after tomal 8.7

hello
i have a uni who stuck on bootloader (BL) bl- v2.01
i use tomal 8.7, browsing aplication and find storage manager (some with partition program... ) and my uni was frozen after reboot ... (long story)
i turn (BL) and want to reflash my rom to other version, but my uni don't want it
i run a mtty/putty and want to do a DoC format, but programs don't want to connect with uni, i try a lot of usb cable, usb ports and a 4 computers with Winxp. i use a few version of mtty and uni exit bootloader, hx4700 bootloader...
and dosent works
yy windows not reconize uni show msg unknown device.
some screeens
http://esiu.kom.pl/universal
uni has no sim or sd card.
Hard reset dosen't works
BL keeps serial when i connect it to pc don't turn to "usb" only shows serial
ps. sory for my english
ps2. hmm i think i brick this uni testing storage manager ( option with unmount partiion or something)
ps3. please a sugestion to repair uni

Hello,
I think if you look on HERE the all will be there for you to sort out your problem
Regards
Jay

hmm ive read many times universal wiki and i dont find there a solution.
i think when i "using" storage aplication in tomal 8,7 i delete a partition then it "stuck"
uni in bl mode when plug usb cable don't change to "usb" stuck on "Serial"
if usb cable is pluged in when i turn bl mode when "usb" shows but dosent react with pc ... don't recognize it, active sync have unmarked 'usb connections'

Do you have your SD card and Sim card out of the PDA??

If you cannot see
Serial changing to USB on your device, I say your USB port is damaged and that prevents you from flashing any ROM or device being recognised by PC.

hmm so my port in uni is dameged? ok its software damage or hardware damage ? 10 minutes before uni was stuck i change rom few times.

[Q] WinMo wont connect via USB since new Froyo installed.

I was trying to put the hum/hiss sound fix on my sd card and I cannot get my pc to connect via USB...
My wife has a TP2 and it connects fine...
I have tried with/without the sd card in, rebooted the pc and phone, rebooted the phone while connected to the pc.... nothing...
wtf...
anyone else with this problem?
PS... NRGZ28 had posted a very basic rom for booting to android back in Feb and it is now gone from hotfile. Anyone know of a quick boot into android?

- Try a different computer
- Try a hard reset
That are the first thing you should do.

Tried hard reset...
Dif PC is not an option at the moment... I have rebooted...

Just flashed the ROM (NRGZ newest, thank goodness I had it on my SD card) and I still cant get it to sync...
I have attached the USB error I am getting... (Win7, new install)
The phone is not asking if I want to active sync or use as storage???? wtf...

FarBeyond said:
Just flashed the ROM (NRGZ newest, thank goodness I had it on my SD card) and I still cant get it to sync...
I have attached the USB error I am getting... (Win7, new install)
The phone is not asking if I want to active sync or use as storage???? wtf...
Click to expand...
Click to collapse
Reboot your PC? lol bet your tried that already...
Try this:
settings > connections > usb to pc > and disable Faster Data Sync then try. This way uses the generic usb drivers and maybe it will connect.

That did not work...
How do I get my Win7 laptop to see the phone with Android on it?

FarBeyond said:
That did not work...
How do I get my Win7 laptop to see the phone with Android on it?
Click to expand...
Click to collapse
dont think thats working yet

Ya I don't think that works yet, it's tied to Android software drivers and the use of the USB port, since there is no drivers to control the port only to charge battery. Windows thinks there is something there, but the phones USB can't communicate back....I think this is the issue or at lease after playing around with it on my phone anyway

Not that it's a huge amount of help but might troubleshoot down to the hardware level...if you go into bootloader mode on the phone and connect to USB does it connect?

I don't think you should go that deep and dirty. My touch pro 2 works only with only 1 (non-HTC) cable of the 10 i have at home, all are the "standard" mini-USB but only one works flawlessly for communicating/flashing/syncing, the other cables either do the same error - device not recognized - or windows says that the device could communicate faster - and only copies files slowly.
All in all: you should simply check with another USB cable or if you have the factory HTC cable try it with that. I noticed that the cable i am using other than the HTC one is a very good quality thick (low-resistance and double-shielded) USB cable and it never failed on me.
One other thing you should definitely watch for: plug the USB cable into the motherboard USB port directly (on the back of the PC where you plug the keyboard, mouse etc.), sometimes PC cases with front panel USB outputs simply die, or are wrongly attached to the motherboard USB header and it can cause the aforementioned problems too, not to mention if it is wrongly attached it could harm your phone too.

USB conection problems, faulty hardware?

my a2 lite does not connet to my pc, I have installed drivers, put it on usb debug, but my pc does not recognize de phone, I have tried different usb ports and cables with no success, it does charge eventually with some cables, but I don't know if this is hardware problem or there is any setting I am missing, it does not give me any choice of chosing the usb kind of conection
it is a new phone just prepped for everyday use, not hacked or modded in any way
USB OTG is working but only reading, I cannot write in external usb drive with es file explorer, or the includer file aplication, it says unsupported operation
any help?

Set hardware id in the adb_usb.ini file perhaps

cpu004 said:
Set hardware id in the adb_usb.ini file perhaps
Click to expand...
Click to collapse
thank you, but I cannot acces from adb as there is absolutely no conection from my computer, it only starts charging but as if it were just a charger, there is no usb mode options avalaible y my phone, and the pc does not recognize anything conected
I have tried to connect with another computer with the same results, it only gets power, but no data comunication whatsoever

as nobody gives any clue or info about some hidden setting, I must assume this is another case of bad quality control in xiaomi products, I will check with the seller

Did you specifically set file transfer mode via the notification drawer or left it on charge only?

cpu004 said:
Did you specifically set file transfer mode via the notification drawer or left it on charge only?
Click to expand...
Click to collapse
the phone does not detect either that it is connected to a computer, so the notification to select the mode of connection does not even show
I have tried usb otg and I can read fine but I cannot write at all in a pendrive
I have installed also an sd card as internal memory and have storage errors all the time so I have removed it
I have tried also conection in fastboot mode but the computer still does not recognize anything connected
I have uses several cables, usb ports and even 2 different pc with same results
My only guess is that there were some hidden config setting that is messing with the phone, that's the reason I am asking before going to the seller.

Seems like a broken USB pin then

cpu004 said:
Seems like a broken USB pin then
Click to expand...
Click to collapse
an usb pin should not affect internal sd memory, and usb does not work like water pipes, one pin data in one pin data out, they need both data pins for reading also, so as it can read from pendrive the problem is somewhere else, not in the connector.

This could be a hardware problem. Have you tried to connect it to another computer?

I have already tried on 3 diferent computers with same results. The only diference so far is that it actually does not read either the content of a pendrive connected through OTG, the first day it read it, now it only detects but reads nothing.
Also when sd is configured as internal memory, instead of reading internal memory, that seems to be the normal result, I can read only the sd card with android file explorers

I have the same problem.
No connection data with pc/mac, it only charges.
I'm italian and like many other italians, I've also the problem with Sim slot 2 with no connect..

robiox said:
I have the same problem.
No connection data with pc/mac, it only charges.
I'm italian and like many other italians, I've also the problem with Sim slot 2 with no connect..
Click to expand...
Click to collapse
It is good to know I am not the only one.

F**k, this phone starts to look like a piece of garbage I dont connect to USB, I dont use SD not 2nd sim, so I did not experience these issues, but, f**k again..

Have you tried rebooting? Press the power button for 15secs. to power it off. Use another cable, use another PC, make sure the cable is plugged in properly... bla bla bla. Oh, have you tried placing the phone into a dry rice bowl? Haha (sorry, I had to). I'm sure you've tried it all.
So, I have not much to say. Only that I had a similar problem with a Moto G after I flashed a LineageOS ROM. It worked fine before, but with the new ROM, the USB didn't work at all (it could only read OTG). It was stuck in the "charging" mode. No notification nor option to turn it to file transfer. The PC didn't recognise it at all, either.
Solution? Initially, I turned on USB debuging option and the PC saw the phone (on windows device manager, it was there, but not on MyPc). It was some advance. I can't remember if adb detected it.
Final solution? Luckily my phone was rooted and had a custom recovery, so I could easily flash the same ROM from the TWRP recovery and everything works fine now.
You might try using Xiaomi's flash tool to try to flash the orginal ROM again IF the phone is recognised by the tool (try if it can see the phone) http://en.miui.com/download-354.html
And I suggest contacting Xiaomi for a warranty claim if needed, 'cause it looks like a harware problem (a pin the the microUSB port issue). But be ready to answer the questions posted above several times haha.
Good luck!

adriakus said:
Have you tried rebooting? Press the power button for 15secs. to power it off. Use another cable, use another PC, make sure the cable is plugged in properly... bla bla bla. Oh, have you tried placing the phone into a dry rice bowl? Haha (sorry, I had to). I'm sure you've tried it all.
So, I have not much to say. Only that I had a similar problem with a Moto G after I flashed a LineageOS ROM. It worked fine before, but with the new ROM, the USB didn't work at all (it could only read OTG). It was stuck in the "charging" mode. No notification nor option to turn it to file transfer. The PC didn't recognise it at all, either.
Solution? Initially, I turned on USB debuging option and the PC saw the phone (on windows device manager, it was there, but not on MyPc). It was some advance. I can't remember if adb detected it.
Final solution? Luckily my phone was rooted and had a custom recovery, so I could easily flash the same ROM from the TWRP recovery and everything works fine now.
You might try using Xiaomi's flash tool to try to flash the orginal ROM again IF the phone is recognised by the tool (try if it can see the phone) http://en.miui.com/download-354.html
And I suggest contacting Xiaomi for a warranty claim if needed, 'cause it looks like a harware problem (a pin the the microUSB port issue). But be ready to answer the questions posted above several times haha.
Good luck!
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Click to collapse
I have done all your sugestions previously, even reseting phone with a new gmail account so no config setting from other phone could interfere, I have also tried fastboot, but although phones goes to fast boot mode the pc does not recognize connection either
it is not an usb pin issue, tried 6 cables, 4 computers, 10 or more usb 2 an 3 ports, I am negotianting in aliexpress a refund, we'll see
If I go into recovery mode with power vol+ a broken android appears.

elsita said:
I have done all your sugestions previously, even reseting phone with a new gmail account so no config setting from other phone could interfere, I have also tried fastboot, but although phones goes to fast boot mode the pc does not recognize connection either
it is not an usb pin issue, tried 6 cables, 4 computers, 10 or more usb 2 an 3 ports, I am negotianting in aliexpress a refund, we'll see
If I go into recovery mode with power vol+ a broken android appears.
Click to expand...
Click to collapse
I don't know if you already did this, but try using a PC with Linux (you can use Ubuntu without installing it on the PC, then install the fastboot package).

Hi,
I had no problem with fastboot and adb with Mac!
Phone recognized by the machine and do transfer boot.img for magisk...
Now I Win!
I can see the internal memory with Android File Transfer (Trasferimento File Android in italian!) - this is the link https://www.android.com/filetransfer/.
My version of Build is V.9.6.8.0.
Solution:
- Connect the phone to pc/mac;
- Go to: Settings -> System -> Developer Options -> Select USB Configuration -> select first "Charge" and then "MTP" (Media Transfer Protocol)
- The system recognize the phone!
[for italian, like me, andare su Impostazioni -> Opzioni Sviluppatore -> Seleziona Configurazione USB -> scegliere "Ricarica" e poi "MTP" (Media Transfer Protocol) ]

robiox said:
Hi,
I had no problem with fastboot and adb with Mac!
Phone recognized by the machine and do transfer boot.img for magisk...
Now I Win!
I can see the internal memory with Android File Transfer (Trasferimento File Android in italian!) - this is the link https://www.android.com/filetransfer/.
My version of Build is V.9.6.8.0.
Solution:
- Connect the phone to pc/mac;
- Go to: Settings -> System -> Developer Options -> Select USB Configuration -> select first "Charge" and then "MTP" (Media Transfer Protocol)
- The system recognize the phone!
[for italian, like me, andare su Impostazioni -> Opzioni Sviluppatore -> Seleziona Configurazione USB -> scegliere "Ricarica" e poi "MTP" (Media Transfer Protocol) ]
Click to expand...
Click to collapse
somehow i was able to connect through fastboot with the help os some advanced users, I unlocked boot and managed to flash original firmware using fastboot mode, the result: no usb connection, no pendrive otg, sd card as internal memory gives storage errors all the time ...
so the phone is faulty, now I am at aliexpress hands claiming for a refund and send back phone

elsita said:
somehow i was able to connect through fastboot with the help os some advanced users, I unlocked boot and managed to flash original firmware using fastboot mode, the result: no usb connection, no pendrive otg, sd card as internal memory gives storage errors all the time ...
so the phone is faulty, now I am at aliexpress hands claiming for a refund and send back phone
Click to expand...
Click to collapse
Where are you from? Where did did you purchase the phone (the actual store, is it in China)? Depending on where are you from and what country did you buy the phone from, by law, you'll get manufacturer warranty. So, any "official" distributor in your country will have to provide a warranty solution for you. If Ali Express is unable to provide you with a solution, look into that.
Let us know how it work out for you

adriakus said:
Where are you from? Where did did you purchase the phone (the actual store, is it in China)? Depending on where are you from and what country did you buy the phone from, by law, you'll get manufacturer warranty. So, any "official" distributor in your country will have to provide a warranty solution for you. If Ali Express is unable to provide you with a solution, look into that.
Let us know how it work out for you
Click to expand...
Click to collapse
I am from Spain, and the aliexpress seller has store in Spain, but you know how chinese vendors act ... no agreement so far, and now aliexpress decides, whenever they turn back to work, because China as you may know is a whole year vacation place for workers ...