If you accidentally bricked your MTK phone through whatever means then see:
How to Unbrick / fix a bricked Mediatek phone using wiselink
How to Unbrick / fix a bricked Mediatek phone using sp flashtool
Some people; however, attempt unbricking / fixing their bricked MTK
phones using either the wrong procedure or OS files. As a result, their
devices get worse. The phones enter into a higher level of unbricking
whereby, they don’t even boot or charge any more, just dead. Even
pressing the power button would have no effect in such a scenario. What
has happened is called a corrupted or missing Preloader (preloader.bin).
We wont go into details about the function of the Preloader but one
function – which you must’ve figured out by now – is that it helps make
your MTK phone boot. To fix the problem of a Corrupted / missing
Preloader, you’ll need the following:
* Download SP Flash Tool
* USB Cord
* If you have access to a working phone of the same model then follow this guide @ how-to-backup-mediatek-stock-roms-with.html to make an MTK backup which should contain Preloader.bin and all other files you’ll need
* If you don’t have access to a working phone of the same model then download an MTK backup for your phone model @:
* Using SP Flash Tool, flash the preloader.bin first (see SP Flash tool guide @ how-to-flash-mediatek-stock-roms-with Sp flashtool.html ).
* If flashing was successful then your phone should at least be able to
vibrate when you press the power button or boot if the correct files are
present on your phone; else, flash other necessary files to make the
phone boot up and start working normally again.
Credits: Team Hovatek