Unhappy Need help D801 isai LG2LL need to fix

[B]Dear all guy ....... i Need you help me to fix my moblie LG2LL D801 isai (japan)

now problem LG G2 D801 is living this situation:
1- Rooted and got OTA
2- No Download mode
3- No recovery mode
4- Secure booting error
5- LG detected as qhsusb_bulk in device manager
6- When you boot your device it shows only LG logo with secure booting error, then the screen goes black while your phone is still on.
7- Other symptoms[/B

Pls.... help me how to fix i don't know how to do now