I rooted and installed TWRP 2.0 using KFU. Then I backed up my system, factory reset, wiped cache and dalvik (did not wipe system). Then I flashed MIUI.us 4.0.3.2.2.3. I got a cannot load volume /misc! error (had this with MIUI 2.1.20 also but it worked). Went to reboot and I'm stuck on the FFF screen. Nothing moves and brightness doesn't change. Any ideas on what to do? When plugged into my PC, it connects then disconnects and is labeled as "kindle".

I have tried the unbrick utility, almost every option on there, but it won't detect the device. Windows doesn't seem to detect the device for long, there's about a 2-3 second window it'll detect a device called "kindle". I've tried pressing the power button to boot into TWRP but it won't open it up (I backed up my system).