HTC One M7 Factory Reset not working

[TonyVov]

HELP - I have AT+T HTC One - stock; I was happily using it too much let the power run down till it died and after that cannot restart.
I can reach the Hard Reset Loader screen.
I have already tried factory reset.
I see a kind of battery picture pop up for a while with two green arrows making a circle and a little down arrow in the midddle - in the center of screen.
A while later the screen goes black and nothing happens.
The SIM card is still inside.
I have tried 2-3 times - battery shows to be >80% as of now.
Any suggestions?? am I doing something wrong??
What to do next.

Oh the phone is in Texas-USA

This is info from the Hard reset (DownVol + Powre) screen:
****Locked****
M7-UL PVT SHIP S-ON R/H
HBOOT 1.56.0000
RADIO-4T.24.3218.09
OpenDSP-V32.120.274.0909
OS-4.18.502.7
eMMC-boot 2048mB
JAN 28 2014, 09:32:4.1704

 

[B. Diddy]

Welcome to Android Central! Are you following the steps here for Wipe Cache Partition? Reset: HTC One (LTE) | T-Mobile Support

 

[TonyVov]

Thanks for the T-Mobile link - it includes procedures not mentioned in the manual -
Recovery - push and hold voldown and power cycle for a new menu
Factory reset - push and hold volup and voldown and powercycle

In my case neither worked for me I have manged to destroy somehow the factory loaded image, luckily device is unedr warranty and will replace - there online help system was pretty clueless for troubleshooting.

 

[Ranjith Shada]

Please help me,my htc one m7 hard reset option not working.It restarts for every 30 seconds.please help me to resolve this issue.

 

[Ranjith Shada]

please reply me ....help me ,.....I am worried about this issue