Need help with mi4 can't boot

[xSmart007x]

-my mi4 was on miui 7 kitkat
-flash twrp 3.2.1.0
-flash cwm 11
-flash new extended partition
-revert to twrp 3.2.1.0
-flash custom rom (but it's not booting although i still can go to twrp)
-flash miui 9 eu via twrp
-the device just rebooted with blank screen after finished flashing

when i connect the phone to pc, my pc doesn't recognize it as a phone, the pc just shows some partitions


edit: nvm i just flashed fastboot rom via miflash and it's all fine now