HTC 826d Boot Loop After Update

HTC 826 A52_DWGL went on bootloop after updating to marshmallow..

Tried flashing all marshmallow rom available. still the same.

Phone was working fine on lollipop.

Plz help me out. Any way to downgrade to lollipop..

Reading information…
Using Fastboot mode…
Reading common information
(bootloader) version: 0.5
(bootloader) version-bootloader:
(bootloader) version-baseband: 1.25.C20413.3@60126
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 2.10.425.3
(bootloader) version-misc: PVT SHIP S-OFF
(bootloader) serialno: CC53ZZ206747
(bootloader) imei: 356200060403470
(bootloader) imei2: 356200060403488
(bootloader) meid: A1000037DF8BE1
(bootloader) product: a52_dwgl
(bootloader) platform: hTCBmsm8939
(bootloader) modelid: 0PHC40000
(bootloader) cidnum: 11111111
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: off
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: 021dffe2
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
(bootloader) mfg-name: 1001
all: Done!
Execution time is 270(ms)
Reading secure flag information
… (bootloader) secure_flag: 0
Execution time is 20(ms)
Reading CID information
… (bootloader) cid: 11111111
Execution time is 10(ms)
Reading MEID information
… (bootloader) meid: A1000037DF8BE1
Execution time is 20(ms)
Read information completed.HTC