Default Nexus 4 dead on 4.4.3 official

Hello, i whant to put 4.4.3 on N4 and with normal flash-all.bat(did it many times before on 4.4.2) and then phone was flashing booloader..waiting devices...and nothing.Phone screen is black only a sound on windows when i connect it.
How can i fix my nexus?
Edit: 1)if i shutdown with pwrbutton 10 sec and turn on via pwr+volume i hear as i connected the phone
2)if turn on normal red light a few sec..