P765 bricked?Any solution?

I have a previously 'security error' P765 phone. Recently,there seem to be easy ways to get rid of that. So,I tried.

I tried this:
[GUIDE] [UNBRICK][ROOT] FLASH Any LG L9 Factory ROM (kdz) WITH OFFLINE FIX
(http://forum.xda-developers.com/show....php?t=2085344)

When the phone is flashed and rebooted, I find that the animation was loading too long, so I rebooted the Phone.
I think here is my fault,as I later researching in the forum said I should wait at least 30 min.

I tried the above method again.
It can't detect my phone, isConnectedPhone is 0


So I tried other flashing method,like
P765 Unbrick Using LG Flash Tool 2014(http://forum.xda-developers.com/opti...-2014-t2950433)
It stuck at 50 %

Am I out of luck? Or is fastboot my last method?

Thanks in advance.