s4 i9505 black screeen after repair security

hello i need your help



I did a root gti9505 galaxy s4 and I followed to the letter telling me what the program but when I did security repair the phone is switched off and there was more



I tried to put it in download mode and recovery but nothing



also when I connect it to the pc tells me that windows can not find this driver:'''' qhsusb_dload



that driver is?!?!?!?

now the screen is black when I did repair security

how to solve??



help me please

via Welcome to gsm-tips http://ift.tt/1cMM8QS