Easy safe solution for black screen after writing firmware
 

read factoryfile as backup( i read mine with CM2) then write black screen file

after that fix the display by ( create newfolder and copy those files from your original phone backup "MTxxxx_Android_scatter.txt, boot.img, lk.bin, logo.bin

https://image.ibb.co/djA9wQ/black_screen.png
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then use anytool that will allow you to thick file b4 write (i mostly use inferno) and write those 3 files

https://preview.ibb.co/gt9cGQ/inferno_black.png
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