HD2 Not Turning on at all after flash

[onyx550]

i got a hd2 it does not turn on at all i have tried holding the down or up button and pushing the reset button but that does not work so i plug it in and get a driver not installed qualcomm cdma technologies msm driver so i need that driver so i can try to fix the phone i need it real bad or my boss will make me give up my hd2 to the person that i messed up his phone trying to put Arabic software on a hd2 that can't have arabic on it so how can i get the new software on it i got the tmobile usa software for it but i just need the driver for it