brick.. lg g2 mini d620k 4g lte.. topic

anyone could help me.. please, here's the situation,, successfully rooted my phone using towel root,, did not bother to unlock the bootloader then,, one time i have old apk file rom manager premium , old version i guess. i installed , then i click backup current rom.. viola.. i succesfully bricked my phone.. i did not make any custom recovery.. the hard situation is i cant download mode or recovery mode or fastboot mode.. my phone cant detect in device manager in my laptop. is theres a change to come back alive my phone.. here's little 1% i see my phone connected to my laptop thru usb view.