Huawei g500 U8836D Mediatek preloader usb device vcom does not work - Android Q&A, Help & Troubleshooting

Hi guys,
I was trying to update my ROM with SP Flash tool but the preloader appear and then desappears as a device. Researching about it I read a lot of cool information about testpoint but I didn't see any explicit information about where exactly is the huawei g500 pro u8832d testpoint. I read some thread saying that possibly I can hold vol down/high and/or power. Then when I hold vol/up in my phone (without battery) the PC sound new device connection and firstly the "Mediatek USB port' appear.. then desappears... After that "Mediatek preloader usb vcom" appear .. then desappears. And the device manager refresh every time showing one or other or none and never become stable.
I found a KCOLO point too in u8836d pcb and the same thing happens when I short circuit it with GND.
Does anybody knows how do I start the preloader permanently with my G500?
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Thanks in advance for all

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[Q] Help me about driver. I really confused with this

First. I am a new member in here, sorry if me disturbing you or false thread place. please correct me if I wrong.
I have an chinese phone with MT6582, I want to install a Custom recovery but there's no tutorial with it. so I searching in chinese phone forum and i found MTKDroidTools to make and flash recovery for all mediatek MT65XX device. I read and do all instruction but my MTKDroidTools cannot read my device, I think i just wrong installing adb and usb driver (adb google without usb driver) and i reinstalling it but it's not change anything so I check in device manager. and it's make me confused.
this picture when I did'nt plug-in my phone
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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and it's when I plug-in my phone
I really confused my computer detect's 4 unknown devices and 1 Universal Serial Bus Controller
any people know how to install adb device and usb controller for these device ?
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mediatek 6582 flashing problem

recently i tried to flash my swipe elite (mediatek 6582) using stock firmware....i installed the drivers but instead of preloader driver it shows mediated usb com in device manager and in sp flashtool...... and whenever i press download and connects my phone in sp flashtool the progress bar goes to 100 % shownig red color bar and nothing happens further.....after 15 minutes it shows
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nothing happens if i keep on pressing the power button...tried by connecting it to laptop for 5 hours...but still it is like dead......but when i connect it to pc it shows as mtk usb port .....
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Lenevo s850 not recognized by laptop

Dear tema member XDA,
my Lenevo s850 not recognize in laptop.
history:
i have root my mobile.
remove some factory installed unused apps then phone malfunctioning,calling not working.
so i made emmc clear in hard reset.then phone update and ok.working ok.
after that i have flash custom vibe 2 ROM by flash tool , phone working ok.
when phone switch and again on.
i try to again flash original flash ROM it completed but preloader error msg was coming and flash tool completed.
. but when disconnect phone and again not ON. i try to factory or meta mode but not working screen,when connect to PC it shows usb not recognize.
i read other thread regarding this.
if i have to jumper the usb charging.give me picture of point.
help me to On the phone.
Make sure USB debugging is set to on. Like so :
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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To turn it on go to about device and click build number 5-7 times to enable developer settings
Sent from my SM-T350 using XDA-Developers mobile app

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Hi guys!
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http :// tinypic . com / r / ftpv91 / 9 -without spaces (because not allow my picture to share
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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I hope somebody can help on me to make it.

Ulefone U007 - Mobile Phone Dead!

Hello,
I need help to recover my phone.
I've flashed my Ulefone U007 several times to update to a newer version.
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{
"lightbox_close": "Close",
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
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The phone doesn't show battery animation when I charge it, No light or vibration when I power on, I've tried "power"+"volume up" or "power"+"volume down", and nothing happen. Can't get to the recovery menu.
I'm using Windows 10. I think something inside the mobile is still alive, because when I connect the mobile in the USB of my computer shows a MediaTek USB Port (COM4) on the devices.
I'm guessing that the bootloader or disk partition is corrupt.
Any help will be appreciated.
Thanks in advance.
Regards.

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