Originally Posted by abdurrahman.kh.f
Thank u very much friend. But what do u mean by download mode? is it flash mod?
You could call it flash mode I guess, yeah.
But before trying a full flash, try going into recovery mode and selecting Wipe data/factory reset.
This will fix problems 99% of the time.
Also, I found a video that might aid you. I haven't watched it, but by the title it seems like it could help you.