[Q] HTC One SV K2_u bootloop _Lock _s-on topic

My htc__621 taiwan k2_u stuck in bootloop
bootloader: lock
S-On

(bootloader) version: 0.5
(bootloader) version-bootloader: 2.21.0000
(bootloader) version-baseband: 1.18.40a.00.05
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 3.11.709.101
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: xxxxxxxxxx
(bootloader) imei: xxxxxxxxxxxx
(bootloader) meid:
(bootloader) product: k2_u
(bootloader) platform: HBOOT-8930
(bootloader) modelid: PL8013000
(bootloader) cidnum: HTC__621
(bootloader) battery-status: low
(bootloader) battery-voltage: 3469mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-2bb255c2
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0

I try to unlock bootloader but it's not work!
Help me plz!