stock m8 stuck on boot

Hi guys as per title, htc m8 totatlly stock, locked, s-on and stuck on boot screen, I can access bootloader and stock recovery
given to me by a friend, have tried wipe/reset,, factory reset - I can only think that the os/rom has been deleted??

M8_UL PVT SHIP S-ON
HBOOT-3.19.0.0000
RADIO-1.25.214500021.06G
OPENDSP V48.2.2-00564-M8974_F0.1211
OS-4.16.401.10
EMMC-BOOT 2048
JAN 15 2015

Is there anything that can be done please?