[Q] Blank Screen after flashing stock topic

Hi every one, first my english is very bad, but i will try
I often installe custum rom, without breaking my device, from slimkat i decide flashing properly lollipop, so i checked that usb debbugging is ok.

install adb and fasboot, and flask stock ktu84P. All code result by OKAY until erase cache, but the screnn gone blank,

i can't see anymore what happend on the screen,

https://imagizer.imageshack.us/v2/32...673/eaUUOE.jpg

i still can run only fastboot, and go on code, but no adb shell resulting by "no device",

i flash all this procedure without unroot the bootload
http://forum.xda-developers.com/goog...image-t2513701

IS anyone have this issue ? and how can i fix it ?

Thank you for your help,