mobile

My headphone jack was broken so I called my insurer and got a repair scheduled. Before sending it in, I wanted to reset to stock for them. Afterwards, I'd flash a new ROM. I was running Mahdi from August 28th 2014. It was about time to restart fresh. Now, I downloaded the KDZ for my IMEI, which was D80220H. The last one I used before that was D80220F. Loaded up my flash tool, went to town. About 30% in it reported an error and quit. The app adviced me to reboot the phone, so I did. That's how I got where I am now. Phone does boot, but after the LG logo it goes into a black screen and shows up in device manager as QHSUSB_BULK. I've tried the guide for this, replaced all the partitions with the images from the D80220H KDZ, but it hasn't changed a thing. What can I try to get it working again? I've heard people say this phone is unbrickable, so I hope I'm not lost yet.