X720 not been recognized in adb, fastboot , QFIL. - LeEco Le Pro3 Questions & Answers

My X720 entres normally in these modes , but pc doesn't recognize device. I tested with different ports, pcs and cables. All same. I notice that in device manager that recognize it as an uknown usb device , failed to read descriptor error 43. My drivers are fine, work flawlessy with my Le 2. My phone charges normally. Also OTG doesn't work . Any suggestions ?

Had the same problem with my x727 what i did was (while leaving the phone connected to the pc:unistall the driver and then reconnecting the phone to the PC) that fixed my problem

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HELP-Serius issue USB DEVICE NOT RECOGNIZED IN Download Mode

Hi
my phone is running blisspop , cmw touch is installed . when i try to connect my phone to my PC , error message saying USB device not recognized , and saying device is malfunctioned.
i tried everything.
tried my phone with my friends laptop
changed usb cable
tried same usb with my friends G2 which is working fine. so this is not issue with USB cable.
so i tried to flash kdz to get rid of problem, i entered my phone "Download mode" my pc still displaying same error message.
is it hardware related issue?
It could be a hardware problem. I'm going through a similar case (but it's not a hardware issue though). By default you shold turn off the phone, connect the usb to the PC (not the phone) and then Hold Vol+ and Power, Until you see it entered download mode, THEN you plug the USB port to the phone.
install driver

Computer not recognising Lenovo K30-W

I have a bricked Lenovo K30-W I'm trying to fix (freezes on startup). My computer (Windows 10) won't recognise it when I connect it to the USB port. In device manager, the phone is displayed as unknown, with error "Device descriptor request failed". I tried connecting to different USB version ports, I tried installing multiple different drivers and software, but nothing helped. Adb doesn't recognise it as well, even if I boot the phone to fastboot with volume+power buttons. Any other ideas? Thanks.
Update: problem seems fixed. I used another USB cable and plugged it into an older version USB port. It is now recognised.

My OP5 cant connect to laptop (Worked before)

Hi
i cant connect my OP5 ( two days ago it worked) to my laptop
changed cables and usb ports with not success
this is what i am getting
"Currently, this hardware device is not connected to the computer. (Code 45)"
and after this i dont see even the yellow mark on the device manager
please assist
thanks
Sounds to me like an driver issue. Just install the platform tools again, reboot pc and connect your phone again. Or enable ADB and USB debugging again in Developers Options and reboot device.
Hi
How do i enable adb on the phone ?
Usb debug i enabled but it didnt helped

Odin not detecting device on download mode

Help! i want to flash official firmware -GT i9500
In past i was able to flash via odin on same pc and now its not showing usb all driver installed
already try changing data cable and diffrent ports i even tried reinstalling win7 and diffrent version of kies and drivers
i dont have other pc or laptops . other samsung phone is showing on download mode on same pc.
odin only shows my phone when i pull battery while connected to usb on download mode and i can flash twrp recovery or
any small size file but cant flash full firmware its disconect after some seconds
it connects well on mtp mode and twrp.
I have the same problem with my S4. I tested J5 2016 and it is connecting properly with the same cable, drivers, etc, either with odin or in normal situations when phone is on. also S8+ connects with its cable and same drivers, etc. But S4 is repeatedly connecting-disconnecting, either in downloading mode or normal situations.
I installed this driver "https://developer.samsung.com/galaxy/others/android-usb-driver-for-windows" which is "SAMSUNG USB Driver for Mobile Phones 1.5.51".
imanam said:
I have the same problem with my S4. I tested J5 2016 and it is connecting properly with the same cable, drivers, etc, either with odin or in normal situations when phone is on. also S8+ connects with its cable and same drivers, etc. But S4 is repeatedly connecting-disconnecting, either in downloading mode or normal situations.
I installed this driver "https://developer.samsung.com/galaxy/others/android-usb-driver-for-windows" which is "SAMSUNG USB Driver for Mobile Phones 1.5.51".
Click to expand...
Click to collapse
Already tried it didnt work. i dont have disconnecting issue on normal mode i can send and recive via usb mtp to pc for your disconnect problem if it disconnect after phone screen off, go to control panel>sytem &security>power option>change paln setting>change advanced power setting>expand all usb setting =enable change to disable.
If anyone has solution to OP please reply
Thank you!
I eventually succeed! Nothing special just used my brothers' laptop (win 7). same cable, same driver (1.5.51).
My primary problem was WiFi and Bluetooth not working. I was hopeful flashing will solve it but unfortunately no. Seems a hardware problem.
With your recommendation (enable to disable) i saw no change with my pc (win 7).

Zenfone 5 t00j charging, but is not recognized by the computer

Hi all, I have bought a second hand t00j however it seems that when i connect it to the computer via usb, it is not listed anywhere, but it is still charging. I tried different USB ports. I have tried with one windows and one linux computer. The phone is in MTP mode, I have the latest intel drivers. It is not showing up in the devices tab on windows. I tried enabling usb debugging. I opened the phone to make sure the connector ribbons between the usb board, the sim card and the mombo are connected properly. Please help.

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