cannot access to hboot

I have HTC one mini I have tried to update ROM operation was unsuccessful now when I reboot my phone shows 4 exclamation mark in corners and cannot boot without fastboot oem boot command. When I pres power and volume buttons shows same screen so cannot access to hboot for install custom recovery and stock ROM.
Please anyone advice me how to restock.

My phone details:

LOCKED
M4_UL PVT SHIP S-OFF RL
HBOOT-2.21.0000
RADIO-1.22 40e.00.07
OpenDSP-V19.2.0268.0927
os-2.12.401.1
eMMC-boot 1024MB

----------------------------

(bootloader) version: 0.5
(bootloader) version-bootloader: 2.21.0000
(bootloader) version-baseband: 1.22.40e.00.07
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 2.12.401.1
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) meid:
(bootloader) product: m4_ul
(bootloader) platform: HBOOT-8930
(bootloader) modelid: PO5820000
(bootloader) cidnum: HTC__A07
(bootloader) battery-status: good
(bootloader) battery-voltage: 4270mV
(bootloader) partition-layout: Generic
(bootloader) security: off
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-871d213f
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.081s

When i try to flash RUU from fastboot it says
fastboot flash zip PD98IMG.zip
sending 'zip' (781472 KB)...
OKAY [ 32.359s]
writing 'zip'...
FAILED (remote: not allowed)
finished. total time: 32.362s