Power LED Sun Cobalt Qube2

[Tom Eichstaedt <info@tom-e.de>]

Hello,

I'm running GNU/Linux Debian 'Sarge' V3.1 on a Sun Cobalt Qube2.

I noticed that the Power LED of my Qube2 switches off after a shutdown 
(halt) allthough the Qube2 is not able to power off e.g. like most ATX 
systems do (ACPI).

So is it possible to switch the LED on/off by software or is this some 
kind of BIOS control?

Thanks in advance for any hint.

Kind regards,
Tom Eichstaedt.