LG G2 Mini D618 Bricked

I was trying to install a different ROM lollipop, and try to unlock the bootloader just that the system no longer starts, not the sign of life, or nothing appears on the computer when connected.
Does anyone know what I can try? I've tried everything. Before I could even access the qhsusb mode but now even that.
Sorry English, do not know English, I used google translate.