phone keeps connecting & disconnecting automatically with pc - Android Q&A, Help & Troubleshooting

I have tried to unlock bootloader in my oppo 15 and it got corrupted and after that its not even showing anything, neither fastboot mode nor stock recovery and whenever i'm trying to connect my phone to pc it keeps connecting and disconnecting automatically and cuz of that i'm not being able to flash stock rom as well. Any Help?

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[Q] MOTOROLA XT615 MOTOLUX flashing help needed

I have a problem with my xt615,
it started out with the bootloop problem.
after that i managed to get into flash mode (redscreen) installed the pc drivers
and tried to flash 2-3 different stock roms, and a recovery via RSD LITE version 6.
at the beginning the phone was recognized as a zeus flash device, but i changed that driver to a motorola usb device.
somehow i manage to get the phone connected in the FLASH MSM7227 but still no program can recognize it so i can flash...
since i tried to flash the recovery i cannot enter the Flash mode (red screen) and earlier, when i was trying to turn on the devices from 50power attempts 2 times it was the moto bootloop logo...
now i cannot do that...
any suggestions how to get this device flashed!?or get it into flash mode?!
all the time its blackscreen and as i enter the usb it connects to the pc depends on which mode...when i hold the powerbutton and connect it it will connect as flash device msm7227 but still...i cannot do anything via RSD LITE , also tried via adb to get it recognized. but no luck...
Help desperatly needed

[q] brick, kdz usb error

Hi, I was looking everywhere since yesterday but can't find a solution. I had cwm + twpr + lollipop cm12. I've decided to back to stock, so as allways: driver, b2cApp, kdz, v20h and v10a, usb, s/w mode, xml parser, shhtp, etc... Standard offline kdz method. But during flashing I stuck on 15% and get the info that my phone anad pc are not connected by usb cable, I tried changing usb ports at pc, reinstaling everything, but I have still the same error. If that woldn't be much enough I ****ed something up and I think I don't have any recovery right now
I can put my phone in s/w mode but I stuck on 15% with usb not connected error.
I can put my phone in fastboot mode but my pc does not recognize it, its just pluging in and out it from windows.
I can put my phone in stuck on LG logo 'mode'
Any help? How to unbrick it? How to flash stock or at least some custom recovery? Of course unlocked bootloader. Please help me :crying:
Key it ****ed up even more.
When kdz show me to connect my cable i clicked retry, plugen cable out and in, kdz found my device, and go to step 2. In half way I had again the same error, so again clicked retry, plug out, plug in. Again founded my device, when I had downloaded 100%, same situation. founded my device, log that tool is extracting kdz and nothing. Waiting about ~1,5h, nothing happend, so I diconected cable. In that moment kdz go to third step and I get windows force close for not repodnig app kdz. I said a loud **** and started again. Phone has not been found anymore by kdz. After a few tries, booted to fastboot, and connected to computer. It has been found as Google Fasbtoo USB, no way to update driver to fastboot. I disconected phone and decided to try again with s/w but nope. S/W not turning on anymore (with or without battery). Fastboot not turning on any more. Just LG logo, when I'm connecting device to PC it is sometging pluging in and out but nothing showing in device manager
Any ideas? Please!
I have the SAME problem with my (now old) LG... I read more than 20 tutorials for getting back to stock and nothing
Sent from my GT-I9205 using XDA Free mobile app
I triend on clen frsh windows I get OMAP device, fastboot is finding my device but wont start fastboot mode in my phone, when trying to flash cwm I get security error and still no s/w mode So I'm affraid that we have to say goodbay to our L9
What's more:
1. Can't find orginal p760 recovery, tried to flash p769 and I get wird effect, after LG logo screen looks like broekrn, some color stripes and all display going to white, then turn off.
2. Using fastboot and choosing options wit u-boot making my phone turning to LG logo with no security error, still no s/w, fastboot or recovery mode.
3. Using option 1 (1. Fastboot) from the fastboot tool is making my phone turnig black screen and nothin more, no even LG logo.
Please can anyone help us?

[Q] Help flashing Alcatel C7 that boots automatically when plugging the USB

Hello,
During the past days I've been trying to flash my C7 with no success. When pressing power button, it turns on and displays the Alcatel logo but stays there, it does not load the OS.
I have tried to use SPtools to flash it, I have the mtk drivers installed in my PC. When I plug the switched-off phone to the computer it turns on and couple seconds after my PC detects it (I can see the preloader mtk loaded on the device manager); however, one second right after it is detected, it is disconnected as it keeps booting to show the logo and stay there. Obviously, if the phone is not detected I cannot use SPtools to flash it.
Any suggestion will be highly appreciated.
PS: I have also tried to connect to it with adb, and dump a ROM using sideload with no sucess, the PC recognizes it from the recovery but after copying the image nothing new happens on reboot.

[Sensation CM13] Device won't boot after restart in USB mode

Hi!
I had my device connected to PC in SD transfer mode to load a file at the SD card and restarted the device afterwards to reboot in recovery mode. Unfortunately I forgot to set it back to normal USB connect before restarting and restarted it, still connected to the PC in transfer mode. Since that, my device won't boot at all. Neither to OS, nor in recovery mode. It seems to be stuck at the data transfer mode. My pc recognizes something plugging in (USB connection sound) but i can't access it. Even fastboot doesn't recognize any attached devices.
Before that it worked fine several weeks, problems with a failed flashing or OS-problems are unlikely. I also tried another phone battery to make sure, it's not just the power supply.
Is there a simple way to fix it? I have no problem to lose all data (since it's just a testing device with nothing on it) but without access to the device i don't know what to do.
Device Information:
rooted HTC Sensation with CM 13 (customized for HTC Sensation) with TWRP recovery.

My pc does not recognize my phone when it is in fastboot mode

Good morning guys,I've been trying since Friday,unlock the bootloader from my phone.
my computer normally recognizes the phone when it is connected, but when I start the phone in fastboot mode, my pc simply disconnects the phone, the USB input is firm, not this badly connects, but even so it disconnects.
I have tried to install numerous drivers times always and the same thing,from the moment it goes into mode of fastboot, it disconnects from computer.
(Remarks: My phone has a mediatek processor, my USB debugging is already activated.)
Mobile: OUKITEL WP5 PRO
xprodwp5 said:
Good morning guys,I've been trying since Friday,unlock the bootloader from my phone.
my computer normally recognizes the phone when it is connected, but when I start the phone in fastboot mode, my pc simply disconnects the phone, the USB input is firm, not this badly connects, but even so it disconnects.
I have tried to install numerous drivers times always and the same thing,from the moment it goes into mode of fastboot, it disconnects from computer.
(Remarks: My phone has a mediatek processor, my USB debugging is already activated.)
Mobile: OUKITEL WP5 PRO
Click to expand...
Click to collapse
if I remember well,in the debug options I put only for file transfer , this may be causing some problem?

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