HTC M8q hang on logo

HTC M8q hang on logo and bootloader is locked.
Please provide legit flashing procedure and firmware.

Here is getvar info

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 1.29.214500021.12G
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 6.15.720.2
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: HT46AWM03687...

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