Thanks for your reply guardian_j,
I could easily be wrong here but the excerpt from the HiJack FAQ below says shutdown.

In reply to:


standby_minutes=30 Number of minutes to automatically shut down the player after the screen blanker fires (default shown). When playlist completes, screen blanker begins countdown regardless of screen activity, then it triggers standby counter.



I'll test it with:
A a longer delay and
B removing the HiJack Kernel

Peter blindly clutching at straws K