mobile

So I wanted to root my phone using stump. But with the new Lollipop update or something it is patched. To get around this I found out you can use LGFlashtool to go back to an older firmware and from there be able to root. So I followed a guide on using the flash tool. Everything went great until it finished but I got the Factory Reset Status 2 code. I quickly found out the solution is to use Board DL instead of Upgrade DL in flash tool. When I went back through the steps I found out my phone will no longer enter download mode. No matter what I try, USB ports, Upgrade or Board DL mode, restarting my computer and phone multiple times. Any suggestions on how to fix this?