The Mediatek USB VCOM port appears properly in the Windows 7 device manager when I connect the USB cable.
After 2 seconds, the phone automatically enters charging mode (=starts charging from the USB port) and at that moment the VCOM device disappears from device manager.
Normally you would remove the battery to flash a rom but in Lenovo s850 you CANNOT remove the battery because it's built in.
Any suggestions?
jtoksa said:
The Mediatek USB VCOM port appears properly in the Windows 7 device manager when I connect the USB cable.
After 2 seconds, the phone automatically enters charging mode (=starts charging from the USB port) and at that moment the VCOM device disappears from device manager.
Normally you would remove the battery to flash a rom but in Lenovo s850 you CANNOT remove the battery because it's built in.
Any suggestions?
Click to expand...
Click to collapse
I was able to figure it out.
If I plug in the phone with the Flash Tool not running, the phone will enter charging mode and the device will disappear from device manager about 2 seconds after connecting the USB cable.
But if I prepare Flash Tool for flashing (load the scatter file etc), and only then connect the phone, it will not go to charging mode, and everything works fine.
jtoksa said:
The Mediatek USB VCOM port appears properly in the Windows 7 device manager when I connect the USB cable.
After 2 seconds, the phone automatically enters charging mode (=starts charging from the USB port) and at that moment the VCOM device disappears from device manager.
Normally you would remove the battery to flash a rom but in Lenovo s850 you CANNOT remove the battery because it's built in.
Any suggestions?
Click to expand...
Click to collapse
1>HOLDING VOLUME+ CONNECT IT TO PC VIA USB(ONCE YOU HEAR A SOUND FROM PC YOU CAN RELEASE VOLUME+)
2>OPEN DEVICE MANAGER(ON COMPUTER SEARCH IT OR CONTROL PANEL)
3>WAIT FOR 2-3 MINUTES
4>YOU WILL HEAR A SOUND & OTHER DEVICE WILL BE DISPLAYED
5>IN OTHER DEVICES ->MT65XX PRE-LOADER
6>RIGHT CLICK MT65XX PRELOADER
7>UPDATE DRIVER
8>LOCATE THE DRIVERS PROVIDED ACCORDING TO YOUR OS(VISTA,WIN7,XP)
9>IT WILL DO ITS STUFF
NOTE:-
Now you can flash firmware through sp-flash tool
if it does'nt work for first time repeat again
it will work for 2 or 3rd time ...
Hope this helps ....
Related
My symptoms are here :
1) wont charge on AC or USB when power on ( no charging animation) !!!! ***But it charges when power completely off*** (got icon charging at centre of the screen)
2) wont being recognised by PC at all (cant access) shows unrecognized device at all time
**weird thing is when i plug to my laptop USB2.0 port it shows nothing (like nothing connected) , only shows device not recognized when i put it in USB3.0 port **
I ve done many researched and did following steps with unsuccessful result :
1) Factory reset for multiple times .
2) Already did force driver install but wont install at all **Naked driver, google driver, samsung driver, PDAnet driver.... (already disable force driver signature in windows 8)
I have no idea at all now someone plz help me ??? appreciate it , thanks in advance ...
Note :
This nexus running stock 4.3 (never rooted) .
It was fully working with connect to PC (MTP) and can show USB connected and Debugging on when pull down the notification bar , few minutes ago TT
EDIT:
Its not charging even though when power off , its just showing charging icon but not charge .
(i power off when 80% , after an hour i power on back , its still 80%)
sumyt said:
My symptoms are here :
1) wont charge on AC or USB when power on ( no charging animation) !!!! ***But it charges when power completely off*** (got icon charging at centre of the screen)
2) wont being recognised by PC at all (cant access) shows unrecognized device at all time
**weird thing is when i plug to my laptop USB2.0 port it shows nothing (like nothing connected) , only shows device not recognized when i put it in USB3.0 port **
I ve done many researched and did following steps with unsuccessful result :
1) Factory reset for multiple times .
2) Already did force driver install but wont install at all **Naked driver, google driver, samsung driver, PDAnet driver.... (already disable force driver signature in windows 8)
I have no idea at all now someone plz help me ??? appreciate it , thanks in advance ...
Note :
This nexus running stock 4.3 (never rooted) .
It was fully working with connect to PC (MTP) and can show USB connected and Debugging on when pull down the notification bar , few minutes ago TT
EDIT:
Its not charging even though when power off , its just showing charging icon but not charge .
(i power off when 80% , after an hour i power on back , its still 80%)
Click to expand...
Click to collapse
It definitely sounds like a driver issue. Have you tried connecting it to another PC?
If it works on another PC then you should be able to determine that your laptop is the issue.
Have you tried uninstalling whatever driver it's using from device manager?
edit: Didn't see your edit. Could also be the cable.
I bought in January s4 mini duos
At the beginning i was well without problem I plug it into my pc it is detected without problem I did all my transfer data without problem
I put a day the system to an official 4.4.2 via Odin and all is well detected without the problem
But last week it is no longer detected on pc via usb cable when I plug it will start charging but without any sign of detection of equipment or on phone or pc .
I test other cables , other pc and nothing changes and the problem persists.
Help me please
bicha2016 said:
I bought in January s4 mini duos
At the beginning i was well without problem I plug it into my pc it is detected without problem I did all my transfer data without problem
I put a day the system to an official 4.4.2 via Odin and all is well detected without the problem
But last week it is no longer detected on pc via usb cable when I plug it will start charging but without any sign of detection of equipment or on phone or pc .
I test other cables , other pc and nothing changes and the problem persists.
Help me please
Click to expand...
Click to collapse
Does it connect in download mode? (maybe also try change MTP etc) Different mode uses different USB drivers etc. Have read sometimes a USB port seems to become disabled in one mode but will work in other.
Make sure your USB driver is good. Are you using the same drivers from some "dodgy" website if so uninstall and just allow Windows to find drivers or get from samsung.
You may be able to enter the USB service menu and change settings by entering *#0808# in dialer then select MTP (or maybe *#7284# & set to PDA)
But connector/power board may have a problem
IronRoo said:
Does it connect in download mode? (maybe also try change MTP etc) Different mode uses different USB drivers etc. Have read sometimes a USB port seems to become disabled in one mode but will work in other.
Make sure your USB driver is good. Are you using the same drivers from some "dodgy" website if so uninstall and just allow Windows to find drivers or get from samsung.
You may be able to enter the USB service menu and change settings by entering *#0808# in dialer then select MTP (or maybe *#7284# & set to PDA)
But connector/power board may have a problem
Click to expand...
Click to collapse
same problem in download mode is not detected.
I changed drivers but the problem persists.
when I 'll branch pc displays a notification at the bottom next to the date indicates an unrecognized USB device.
bicha2016 said:
same problem in download mode is not detected.
I changed drivers but the problem persists.
when I 'll branch pc displays a notification at the bottom next to the date indicates an unrecognized USB device.
Click to expand...
Click to collapse
Turn phone off. Remove battery & SIM (though I think it's probably the battery that does the trick). Reassemble & your USB may be back if it's none of the other things and it's not hardware .......:fingers-crossed:
(If it doesn't work 1st time do it again but only reassemble after a minute or two to be certain all power is drained from caps etc.)
Hi
I have a Sony Xperia Z 5 Premium dual e6833 model. a few days ago after about one month when i try to connect a usb flash via otg cable the usb not detected. I think after update to Android 6.0 (ota update) this problem has occured.then I download the 6.0 stock rom to flash via flash tools that i found phone can't connect to pc. Flash tools and Xperia companion can't recognize the phone however driver's installed.but Flash tools can detect phone in flashmode and fastbootmode. I flashed the 6.0 buildnumber 185 whit full wipe. But the problem not solved. Then 6.0 buildnumber 163. Then 6.0.1 buildnumber 224. Then 5.0 buildnumber 170 and all these fladhed whit full wipe. But the problem still not solved.
By the way... When I try to connect the phone to pc via usb cable it's not detecte by pc and no reaction in pc and phone. But when i turned off the phone and connect the phone to pc via usb cable and then turn on the phone Xperia companion and flash tools can recognize the phone and the pop up notification for selecting connection mode is shown in notification bar. But flash tools recognize the phone whit usb debugging off however the usb debugging is on and unknown source is active in setting.
In this situation if disconnect the phone and try to reconnect it the same problem is occured.
I tried to change the settings usb connection from setting - developer options- select usb configuration but the problem still not solved.
Please help me
Did you select the type of usb but connection on the phone? In 6.0 it gives you the various options such as charge only or mtp connection.
Robobob1221 said:
Did you select the type of usb but connection on the phone? In 6.0 it gives you the various options such as charge only or mtp connection.
Click to expand...
Click to collapse
pop up message that allow you to select the usb connection is not shown in phone. Only when I turn off the phone and connect the phone to pc via usb cable and then turn on the phone this option is shown in notification bar and everything is ok. If i disconnect the phone and try to reconnect it again the same problem is occured.
By the way usb device can't detect. When I push detect the usb device after a few minutes failure message is shown.
mizanlo said:
pop up message that allow you to select the usb connection is not shown in phone. Only when I turn off the phone and connect the phone to pc via usb cable and then turn on the phone this option is shown in notification bar and everything is ok. If i disconnect the phone and try to reconnect it again the same problem is occured.
By the way usb device can't detect. When I push detect the usb device after a few minutes failure message is shown.
Click to expand...
Click to collapse
Uninstall the usb driver on pc, forget device connection on phone, and reinstall driver via the pc companion
Sent from my iPad using Tapatalk
Hi, for the otg connection there is a quick setting. I think sony found this solution to avoid problems with the open micro usb port and the IP67 certification. Try to connect a USB key to the phone and press the search usb quick setting, worked for me!
Sent from my E6853 using XDA-Developers mobile app
bj4ever said:
Hi, for the otg connection there is a quick setting. I think sony found this solution to avoid problems with the open micro usb port and the IP67 certification. Try to connect a USB key to the phone and press the search usb quick setting, worked for me!
Click to expand...
Click to collapse
Where is this quick setting? Do you mean the detect usb device button in notification bar?
mizanlo said:
Where is this quick setting? Do you mean the detect usb device button in notification bar?
Click to expand...
Click to collapse
Yes, the detect usb device button in the notification bar
Sent from my E6853 using XDA-Developers mobile app
Hi , my Poco F3 arrived today and i was very hyped to use it but i've come into a problem.
Neither my win10 laptop or my F3 can identify each other when i connect them via USB, i can't even find it on the device manager, on my sister's laptop it connects and identifies weirdly enough but that's an older laptop is really slow and unreliable for anything specially since its not mine.
My laptop is a new one 2020 model and it connects well to any other device ...
I've tried replugging 100 times and i've made sure USB debbuging was toggled on my poco, also made sure the usb config was on file transfer, i've tried installing various ADB drivers too but it didn't help.
Can anyone please help me out with this , the poco f3 is my first android device and i really wanted to put other roms and use the ADB fastboot tools to debloat it but without connecting it with my laptop its gonna be very hard ...
Use official USB cable. Don't use a USB hub. Connect directly to the laptop. Change a USB port.
Plug your phone USB cable to laptop, switch file transfer mode on phone drop down menu, then reboot your laptop without disconnecting your phone from laptop.
Right click on the windows button on the task bar. Click on device manager. Does any device appear on their when the F3 is plugged in. Also as said above directly connect to a PC usb port rather than through a hub (maybe use a Usb c to usb c cable if your laptop only has usb c ports)
One plus 9pr complete brick. Cannot access fastboot or recovery. Will not turn on and when I plug in only shows a connect a chargwer screen. It is charged. I cannot get msm tool to connect either.
What led up to this point?
We'll need more info than this:
Are you using a Windows computer?
Is it Windows 10?
Have you plugged in USB via USB port on the computer or USB hub? (Should always plug directly into the computer)
Windows 10 has driver signature checks on by default, the Qualcomm drivers are not signed so you need to disable signing before trying to use MSM tool : https://www.tenforums.com/tutorials...river-signature-enforcement-windows-10-a.html (I usually use option 2, BCDEdit)
Here's the Qualcomm EDL drivers : https://www.androidfilehost.com/?fid=14943124697586335873
You need to press both VOL buttons and POWER to get into EDL mode, make sure you choose the correct assignment from the top "TARGET" dropdown in the MSM tool too and make sure it's the correct MSM tool for your region/phone. They're all available from here
There's a decent guide here
There's a video here for OnePlus 8/8 Pro but it's the same technique (remember to give him a like if he helps you out ) :
If the MSM tool doesn't show "CONNECTED" on any COM port then keep the cable connected and try rebooting the phone back into EDL mode again, it will eventually show up.