Power off the phone, disconnect and reconnect the battery(if possible) and connect USB cable...
Hold the VOL UP to force MediaTek BootROM.
Scanning BootROM or Preloader port... Done
Detected [BootROM] MediaTek USB Port (COM29)
Connection status: EHCI:HUB:USB 1.10 High-Speed
USB Driver: [MediaTek Inc.] usbser, version: 2.0.1136.0, date: 9-1-2011
Connecting Bootrom...
Sending Download Agent...
Platform: MT6765, Hw ver: 0xCA00, Sw ver: 0x0000
Secure config: 0x00
Error: -1073545213 (STATUS_DA_SELECTION_ERR)
Error: -1073545213 (STATUS_DA_SELECTION_ERR)
Cannot find proper DA hw_code [0x6765]- sw_ver [0x0]
(connection.cpp, line:375)