How to fix dead totally when flashing with smart phone flash tool ?
There problem often about firmwares version, so checked really firmwares suitable with your lenovo a850 when flashing and upgrade android softwares.
To fix dead boot (no detected usb) must be jumper like follow the image line. Now your phone detected by windows and can do for flashing with SP flash tool.
|Lenovo A850 Dead Boot Fix by Testpoint|
Make sure firmwares input with following like image below, do not insert preloader and preload file when flashing if firmwares not really tested before.
|Setting for sp flash tool|
Rom Name : Lenovo A850
File size : 350MB
Hosted : 4shared
Uploader ; gsmaceh.com
Password : gsmaceh.com
ROM Version: ROM Android 4.2.2
Download Now | Tested many times.