[XDA Assist] pee_why:
Hello everyone,

My S700 can't be powered on and it will not charge :crying: i think SP can detected my S700 yet but the device manager loop between "MediaTek USB port (COM14)" and "MediaTek Preloader USB VCOM (Android) (COM12)"... and me i'm crying !!! PLEASE HELP ME whta i will do ???

I understand that my last solution is to flash yet from the manufactor ROM... so to lost my work :'( but before i need to be sure that this troubles about my port COM 12 and 14 will make not more troubles ???

I hope you will understand better my troubles from this details :

*1/ I download the new S700 ROM from the manufactor website so i installed the drivers and flash it whith SP_MDT_exe_v3.1504-A2015.03.18-v06-customer => success! The 20150624_c218v13_jbl_a228_hd_3m_mstar ROM working well and during 2 weeks i install all my applications, contacts, ...

*2/ I try to transfer my sms from my old phone (Iocean X7hd) to my new S700 with Helium. It recognize my X7 and save my sms but it not working with the S700 (i opened a ticket to Helium) so i installed ALL MTK+ADB drivers found in this file www.adrive.com/public/fSxNQP/All MTK USB Driverv.9.2.PDanet.Adb 2015.zip => never working ! I remember about a conflict driver message...

*3/ I use MOBILedit ENTERPRISE_7_8_3_6076 to make a backup => it recognize my S700 and make a partial backup because my S700 is not rooted

*4/ I download the files from www.needrom.com/download/mstar-s700 about to root for version 20150624_c218v13_jbl_a228_hd_3m_mstar uploaded by fpiva4a : https://drive.google.com/file/d/0B358CZ0vWBWpcWZfV3A4bDFEaTg/view

*5/ I follow the tuto from xdaforums.com/android/general/mstar-s700-review-5-5-hd-touch-id-t3132431/page3 so i open SPFT v5.1528, choose the download agent+scatter file from the fpiva4a's files :

- On the main screen choose firmware upgrade from the drop down menu

- Pull out the battery and connect your phone to your PC, let the SPFT and the phone initiate a 'handshake' => there is nothing (i don't remeber if at this step the device manager loop already...)

- Unplug your phone from the USB cable. Click on the download button on the main screen. Now put your battery back into the phone and plug in the phone to your pc using the usb cable=> the SP Flah Tool start and see a progress bar but i have this error :

" BROM ERROR : S_FTHND_FILE_IS_NOT_LOADED_YET (5007)

There is file not loaded yet!!

[HINT]:

1. Please check if the DA path is correct.

2. Please check if all the ROM files exist.

3. Please check if the scatter file description is sync with the exist ROM files"

*6/ I click on help+ok, close SP and unplugg my S700 => i can't be powered on !!!

*7/ I plug the USB cable and i heard sound to mount it and after loop to unmount => i thought about a conflict (step */2) so from the device manager i try to unistall the "MediaTek USB port" and "MediaTek Preloader USB VCOM (Android)" what loop. Also i uninstall from the Control Panel W7 all the drivers installed by step */2

*8/ I try several times the *5/ but always like */6 my S700 not power on

*9/ I use USBdeview and try to uninstall my port => the green line always loop between this 2 lines

and i open the SP_MDT_exe_v3.1504-A2015.03.18-v06-customer from step *1/ => the scan is well and find my S700 on the port COM12

thanks for your help and sorry for this big post but i wanted to follow all the details even if i read all your link i don't find a specific reply about my trouble