ATA and NVMe drives can be set to a SECURITY FROZEN state which disables certain security-related firmware commands. Ziperase has a routine that runs during the early stages of the boot process to unset this state.
If a frozen drive is detected, Ziperase will put the client PC to sleep and wake it up after a few seconds, though some hardware may not support this sleep routine.
To boot in this case, select “Boot ignoring security frozen state” from the boot menu.
If the system still fails to wake, manually sleep cycle it by pressing Ctrl-Alt-U after the client has fully booted, but before erasure has started.