So here's what happened. I was planning on getting the M8 when it comes out on TMO. So I was returning my phone to stock, removing tampered flag and so on. After I did all of that I went to update my phone to 4.4.2 via the official update. However, during that process something happened and the update failed. I rebooted my phone and now it loads a pink, pixelated screen then goes to the HTC One loading screen then just freezes there (and the colors are off). I cannot boot my phone up completely. I can still push custom recoveries and my computer is making connect/disconnect sounds when I plug in my phone (if I do adb devices it says nothing is connected though). I'm s-off with hboot 1.56 and I was rooted. I can still boot into fastboot and my recovery and that's it. I do not have a backup that I can flash. I have also tried sideloading via twrp and that just fails.
I'm kind of just lost on what to do at this point. I have searched the forums and google and I haven't really found anything else that I can try at this point.