My LG G2 mini D620r is bricked, how can I fix it?

[thewarrior2]

lg g2 mini d620r bricked!!!

Hi guys
i have a g2 mini d620r no way to access recovery,download mode, fastboot it shows secure booting error then black screen when i plug usb to my phone it shows in device manger many partitions !! any help please :'(