HTC ONE M8 HTC_044 stuck at HTC logo after OTA (marshmallow)

MY HTC one M8 is stuck at boot screen. Tried reset etc. does not work.

Following are details of device:
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 1.29.214500021.24_2G
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 6.14.707.1
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B11000
(bootloader) cidnum: HTC__044
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: 205bdca3
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0

Can you please help me :
1. Do i need to get stock rom and flash. if yes where do i get it.
2. Is there any other way to resolve this issue.

Thanks a lot

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