This usually indicates an incompatible preloader or a locked bootloader.

The standard platform application for deploying raw ROM bin image segments. MediaTek Official Developer Zone

However, updating the preloader is the most dangerous maintenance operation you can perform on a device. The preloader is the only component that knows how to "talk" to the hardware to initialize it. If this update goes wrong—flashing the wrong file, losing power mid-flash, or using a corrupt image—the device will be completely "bricked." It won't show a charging light, won't turn on, and won't be recognized by a PC, rendering it an inoperable circuit board.

Look for the configuration option checkbox labeled or "Use Custom EMI" .